./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa --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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:38:40,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:38:40,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:38:40,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:38:40,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:38:40,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:38:40,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:38:40,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:38:40,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:38:40,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:38:40,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:38:40,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:38:40,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:38:40,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:38:40,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:38:40,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:38:40,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:38:40,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:38:40,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:38:40,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:38:40,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:38:40,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:38:40,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:38:40,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:38:40,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:38:40,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:38:40,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:38:40,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:38:40,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:38:40,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:38:40,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:38:40,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:38:40,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:38:40,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:38:40,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:38:40,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:38:40,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:38:40,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:38:40,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:38:40,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:38:40,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:38:40,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:38:40,425 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:38:40,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:38:40,425 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:38:40,425 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:38:40,426 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:38:40,426 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:38:40,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:38:40,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:38:40,426 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:38:40,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:38:40,427 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:38:40,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:38:40,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:38:40,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:38:40,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:38:40,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:38:40,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:38:40,428 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:38:40,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:38:40,428 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:38:40,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:38:40,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:38:40,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:38:40,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:38:40,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:38:40,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:38:40,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:38:40,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:38:40,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:38:40,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:38:40,429 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:38:40,429 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:38:40,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:38:40,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:38:40,430 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_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2021-12-06 22:38:40,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:38:40,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:38:40,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:38:40,649 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:38:40,650 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:38:40,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2021-12-06 22:38:40,691 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/data/ee2a50b73/9f4fcc61d92d48ce8059c6788480e7bd/FLAG791ac4697 [2021-12-06 22:38:41,067 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:38:41,067 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2021-12-06 22:38:41,072 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/data/ee2a50b73/9f4fcc61d92d48ce8059c6788480e7bd/FLAG791ac4697 [2021-12-06 22:38:41,466 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/data/ee2a50b73/9f4fcc61d92d48ce8059c6788480e7bd [2021-12-06 22:38:41,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:38:41,469 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:38:41,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:38:41,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:38:41,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:38:41,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:38:41" (1/1) ... [2021-12-06 22:38:41,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28bed951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:38:41, skipping insertion in model container [2021-12-06 22:38:41,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:38:41" (1/1) ... [2021-12-06 22:38:41,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:38:41,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:38:41,617 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2021-12-06 22:38:41,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:38:41,625 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:38:41,638 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2021-12-06 22:38:41,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:38:41,648 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:38:41,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:38:41 WrapperNode [2021-12-06 22:38:41,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:38:41,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:38:41,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:38:41,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:38:41,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:38:41" (1/1) ... [2021-12-06 22:38:41,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:38:41" (1/1) ... [2021-12-06 22:38:41,674 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2021-12-06 22:38:41,674 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:38:41,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:38:41,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:38:41,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:38:41,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:38:41" (1/1) ... [2021-12-06 22:38:41,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:38:41" (1/1) ... [2021-12-06 22:38:41,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:38:41" (1/1) ... [2021-12-06 22:38:41,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:38:41" (1/1) ... [2021-12-06 22:38:41,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:38:41" (1/1) ... [2021-12-06 22:38:41,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:38:41" (1/1) ... [2021-12-06 22:38:41,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:38:41" (1/1) ... [2021-12-06 22:38:41,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:38:41,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:38:41,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:38:41,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:38:41,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:38:41" (1/1) ... [2021-12-06 22:38:41,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:38:41,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:38:41,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:38:41,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:38:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:38:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-06 22:38:41,761 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-06 22:38:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-06 22:38:41,761 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-06 22:38:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:38:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 22:38:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 22:38:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-06 22:38:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-06 22:38:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:38:41,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:38:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 22:38:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 22:38:41,763 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-06 22:38:41,822 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:38:41,823 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:38:41,930 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:38:41,960 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:38:41,960 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 22:38:41,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:38:41 BoogieIcfgContainer [2021-12-06 22:38:41,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:38:41,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:38:41,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:38:41,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:38:41,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:38:41" (1/3) ... [2021-12-06 22:38:41,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2123229e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:38:41, skipping insertion in model container [2021-12-06 22:38:41,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:38:41" (2/3) ... [2021-12-06 22:38:41,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2123229e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:38:41, skipping insertion in model container [2021-12-06 22:38:41,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:38:41" (3/3) ... [2021-12-06 22:38:41,968 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2021-12-06 22:38:41,973 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 22:38:41,973 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:38:41,973 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:38:41,973 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 22:38:41,998 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:41,998 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:41,999 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:41,999 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:41,999 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,000 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,000 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,000 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,000 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,000 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,001 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,001 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,001 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,002 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,002 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,002 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,002 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,002 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,003 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,003 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,003 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,003 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,004 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,004 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,004 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,005 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,005 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,005 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,005 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,006 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,006 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,006 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,006 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,006 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,007 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,007 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,007 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,007 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,007 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,008 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,008 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,008 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,008 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,008 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,012 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,012 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,012 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,012 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,013 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,014 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,014 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,014 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,015 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,015 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:38:42,018 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-06 22:38:42,058 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:38:42,063 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 [2021-12-06 22:38:42,063 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-06 22:38:42,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2021-12-06 22:38:42,105 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2021-12-06 22:38:42,105 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 22:38:42,108 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2021-12-06 22:38:42,108 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2021-12-06 22:38:42,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2021-12-06 22:38:42,128 INFO L129 PetriNetUnfolder]: 6/70 cut-off events. [2021-12-06 22:38:42,128 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 22:38:42,128 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:38:42,129 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:38:42,129 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:38:42,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:38:42,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1700112450, now seen corresponding path program 1 times [2021-12-06 22:38:42,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:38:42,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120371427] [2021-12-06 22:38:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:38:42,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:38:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:38:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:42,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:38:42,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120371427] [2021-12-06 22:38:42,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120371427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:38:42,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:38:42,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:38:42,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889707660] [2021-12-06 22:38:42,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:38:42,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 22:38:42,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:38:42,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 22:38:42,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 22:38:42,317 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 82 [2021-12-06 22:38:42,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:42,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:38:42,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 82 [2021-12-06 22:38:42,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:38:42,361 INFO L129 PetriNetUnfolder]: 10/93 cut-off events. [2021-12-06 22:38:42,361 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2021-12-06 22:38:42,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 93 events. 10/93 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 1 based on Foata normal form. 11/94 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2021-12-06 22:38:42,364 INFO L132 encePairwiseOnDemand]: 78/82 looper letters, 6 selfloop transitions, 0 changer transitions 2/67 dead transitions. [2021-12-06 22:38:42,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 158 flow [2021-12-06 22:38:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 22:38:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-06 22:38:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2021-12-06 22:38:42,377 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.926829268292683 [2021-12-06 22:38:42,378 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2021-12-06 22:38:42,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2021-12-06 22:38:42,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:38:42,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2021-12-06 22:38:42,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:42,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:42,387 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:42,389 INFO L186 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 2 states and 152 transitions. [2021-12-06 22:38:42,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 158 flow [2021-12-06 22:38:42,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-06 22:38:42,394 INFO L242 Difference]: Finished difference. Result has 69 places, 65 transitions, 134 flow [2021-12-06 22:38:42,395 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2021-12-06 22:38:42,398 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2021-12-06 22:38:42,399 INFO L470 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 134 flow [2021-12-06 22:38:42,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:42,399 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:38:42,399 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:38:42,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:38:42,399 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:38:42,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:38:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1829195169, now seen corresponding path program 1 times [2021-12-06 22:38:42,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:38:42,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105295844] [2021-12-06 22:38:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:38:42,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:38:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:38:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:42,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:38:42,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105295844] [2021-12-06 22:38:42,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105295844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:38:42,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:38:42,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:38:42,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137567697] [2021-12-06 22:38:42,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:38:42,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:38:42,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:38:42,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:38:42,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:38:42,543 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 82 [2021-12-06 22:38:42,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:42,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:38:42,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 82 [2021-12-06 22:38:42,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:38:42,612 INFO L129 PetriNetUnfolder]: 64/183 cut-off events. [2021-12-06 22:38:42,612 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-12-06 22:38:42,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 183 events. 64/183 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 533 event pairs, 25 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 322. Up to 80 conditions per place. [2021-12-06 22:38:42,614 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 26 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2021-12-06 22:38:42,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 213 flow [2021-12-06 22:38:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:38:42,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 22:38:42,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 344 transitions. [2021-12-06 22:38:42,618 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2021-12-06 22:38:42,618 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 344 transitions. [2021-12-06 22:38:42,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 344 transitions. [2021-12-06 22:38:42,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:38:42,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 344 transitions. [2021-12-06 22:38:42,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:42,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:42,623 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:42,623 INFO L186 Difference]: Start difference. First operand has 69 places, 65 transitions, 134 flow. Second operand 6 states and 344 transitions. [2021-12-06 22:38:42,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 213 flow [2021-12-06 22:38:42,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 22:38:42,626 INFO L242 Difference]: Finished difference. Result has 73 places, 66 transitions, 152 flow [2021-12-06 22:38:42,626 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2021-12-06 22:38:42,627 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2021-12-06 22:38:42,627 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 152 flow [2021-12-06 22:38:42,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:42,627 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:38:42,627 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:38:42,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:38:42,628 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:38:42,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:38:42,628 INFO L85 PathProgramCache]: Analyzing trace with hash -332340421, now seen corresponding path program 1 times [2021-12-06 22:38:42,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:38:42,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137323174] [2021-12-06 22:38:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:38:42,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:38:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:38:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:42,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:38:42,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137323174] [2021-12-06 22:38:42,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137323174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:38:42,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:38:42,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:38:42,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347981539] [2021-12-06 22:38:42,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:38:42,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:38:42,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:38:42,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:38:42,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:38:42,689 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2021-12-06 22:38:42,689 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:42,690 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:38:42,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2021-12-06 22:38:42,690 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:38:42,771 INFO L129 PetriNetUnfolder]: 87/283 cut-off events. [2021-12-06 22:38:42,771 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2021-12-06 22:38:42,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 283 events. 87/283 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1086 event pairs, 37 based on Foata normal form. 1/257 useless extension candidates. Maximal degree in co-relation 517. Up to 113 conditions per place. [2021-12-06 22:38:42,775 INFO L132 encePairwiseOnDemand]: 75/82 looper letters, 32 selfloop transitions, 5 changer transitions 1/86 dead transitions. [2021-12-06 22:38:42,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 291 flow [2021-12-06 22:38:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:38:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 22:38:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2021-12-06 22:38:42,779 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2021-12-06 22:38:42,779 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2021-12-06 22:38:42,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2021-12-06 22:38:42,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:38:42,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2021-12-06 22:38:42,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:42,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:42,785 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:42,785 INFO L186 Difference]: Start difference. First operand has 73 places, 66 transitions, 152 flow. Second operand 6 states and 396 transitions. [2021-12-06 22:38:42,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 291 flow [2021-12-06 22:38:42,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-06 22:38:42,788 INFO L242 Difference]: Finished difference. Result has 77 places, 68 transitions, 170 flow [2021-12-06 22:38:42,789 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2021-12-06 22:38:42,790 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2021-12-06 22:38:42,790 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 170 flow [2021-12-06 22:38:42,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:42,790 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:38:42,790 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:38:42,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 22:38:42,791 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:38:42,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:38:42,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1801956563, now seen corresponding path program 2 times [2021-12-06 22:38:42,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:38:42,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145411316] [2021-12-06 22:38:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:38:42,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:38:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:38:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:42,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:38:42,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145411316] [2021-12-06 22:38:42,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145411316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:38:42,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493294171] [2021-12-06 22:38:42,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:38:42,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:42,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:38:42,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:38:42,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:38:42,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 22:38:42,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:38:42,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 22:38:42,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:38:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:38:43,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:38:43,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493294171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:38:43,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:38:43,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-12-06 22:38:43,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073617180] [2021-12-06 22:38:43,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:38:43,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:38:43,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:38:43,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:38:43,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:38:43,121 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 82 [2021-12-06 22:38:43,121 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:43,121 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:38:43,121 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 82 [2021-12-06 22:38:43,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:38:43,225 INFO L129 PetriNetUnfolder]: 44/166 cut-off events. [2021-12-06 22:38:43,225 INFO L130 PetriNetUnfolder]: For 50/56 co-relation queries the response was YES. [2021-12-06 22:38:43,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 166 events. 44/166 cut-off events. For 50/56 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 530 event pairs, 23 based on Foata normal form. 13/174 useless extension candidates. Maximal degree in co-relation 338. Up to 66 conditions per place. [2021-12-06 22:38:43,227 INFO L132 encePairwiseOnDemand]: 74/82 looper letters, 20 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2021-12-06 22:38:43,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 233 flow [2021-12-06 22:38:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:38:43,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-06 22:38:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 460 transitions. [2021-12-06 22:38:43,229 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7012195121951219 [2021-12-06 22:38:43,229 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 460 transitions. [2021-12-06 22:38:43,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 460 transitions. [2021-12-06 22:38:43,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:38:43,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 460 transitions. [2021-12-06 22:38:43,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 57.5) internal successors, (460), 8 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:43,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:43,233 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:43,233 INFO L186 Difference]: Start difference. First operand has 77 places, 68 transitions, 170 flow. Second operand 8 states and 460 transitions. [2021-12-06 22:38:43,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 233 flow [2021-12-06 22:38:43,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 221 flow, removed 3 selfloop flow, removed 4 redundant places. [2021-12-06 22:38:43,236 INFO L242 Difference]: Finished difference. Result has 78 places, 67 transitions, 168 flow [2021-12-06 22:38:43,236 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2021-12-06 22:38:43,237 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2021-12-06 22:38:43,237 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 168 flow [2021-12-06 22:38:43,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:43,237 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:38:43,237 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:38:43,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:38:43,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:43,438 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:38:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:38:43,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1474269123, now seen corresponding path program 1 times [2021-12-06 22:38:43,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:38:43,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305549670] [2021-12-06 22:38:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:38:43,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:38:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:38:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:43,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:38:43,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305549670] [2021-12-06 22:38:43,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305549670] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:38:43,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098084834] [2021-12-06 22:38:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:38:43,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:43,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:38:43,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:38:43,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:38:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:38:43,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 22:38:43,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:38:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:43,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:38:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:44,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098084834] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:38:44,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:38:44,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2021-12-06 22:38:44,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421725691] [2021-12-06 22:38:44,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:38:44,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:38:44,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:38:44,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:38:44,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:38:44,140 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2021-12-06 22:38:44,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:44,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:38:44,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2021-12-06 22:38:44,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:38:44,202 INFO L129 PetriNetUnfolder]: 17/162 cut-off events. [2021-12-06 22:38:44,202 INFO L130 PetriNetUnfolder]: For 38/44 co-relation queries the response was YES. [2021-12-06 22:38:44,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 162 events. 17/162 cut-off events. For 38/44 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 427 event pairs, 1 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 266. Up to 21 conditions per place. [2021-12-06 22:38:44,204 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 25 selfloop transitions, 5 changer transitions 5/86 dead transitions. [2021-12-06 22:38:44,204 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 302 flow [2021-12-06 22:38:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:38:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 22:38:44,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2021-12-06 22:38:44,207 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7987804878048781 [2021-12-06 22:38:44,207 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 393 transitions. [2021-12-06 22:38:44,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 393 transitions. [2021-12-06 22:38:44,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:38:44,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 393 transitions. [2021-12-06 22:38:44,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:44,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:44,211 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:44,211 INFO L186 Difference]: Start difference. First operand has 78 places, 67 transitions, 168 flow. Second operand 6 states and 393 transitions. [2021-12-06 22:38:44,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 302 flow [2021-12-06 22:38:44,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-06 22:38:44,214 INFO L242 Difference]: Finished difference. Result has 81 places, 71 transitions, 197 flow [2021-12-06 22:38:44,215 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2021-12-06 22:38:44,216 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2021-12-06 22:38:44,216 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 197 flow [2021-12-06 22:38:44,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:44,216 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:38:44,216 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:38:44,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:38:44,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:44,418 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:38:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:38:44,419 INFO L85 PathProgramCache]: Analyzing trace with hash 343908841, now seen corresponding path program 2 times [2021-12-06 22:38:44,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:38:44,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435486627] [2021-12-06 22:38:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:38:44,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:38:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:38:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:38:44,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:38:44,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435486627] [2021-12-06 22:38:44,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435486627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:38:44,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080217442] [2021-12-06 22:38:44,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:38:44,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:44,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:38:44,590 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:38:44,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:38:44,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:38:44,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:38:44,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 22:38:44,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:38:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:38:44,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:38:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:38:44,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080217442] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:38:44,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:38:44,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2021-12-06 22:38:44,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823212764] [2021-12-06 22:38:44,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:38:44,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 22:38:44,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:38:44,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 22:38:44,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:38:44,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 82 [2021-12-06 22:38:44,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 64.1) internal successors, (641), 10 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:44,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:38:44,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 82 [2021-12-06 22:38:44,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:38:44,930 INFO L129 PetriNetUnfolder]: 109/370 cut-off events. [2021-12-06 22:38:44,931 INFO L130 PetriNetUnfolder]: For 199/209 co-relation queries the response was YES. [2021-12-06 22:38:44,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 370 events. 109/370 cut-off events. For 199/209 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1754 event pairs, 24 based on Foata normal form. 15/376 useless extension candidates. Maximal degree in co-relation 819. Up to 124 conditions per place. [2021-12-06 22:38:44,934 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 34 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2021-12-06 22:38:44,934 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 414 flow [2021-12-06 22:38:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:38:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 22:38:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 466 transitions. [2021-12-06 22:38:44,936 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8118466898954704 [2021-12-06 22:38:44,936 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 466 transitions. [2021-12-06 22:38:44,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 466 transitions. [2021-12-06 22:38:44,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:38:44,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 466 transitions. [2021-12-06 22:38:44,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:44,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:44,941 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:44,941 INFO L186 Difference]: Start difference. First operand has 81 places, 71 transitions, 197 flow. Second operand 7 states and 466 transitions. [2021-12-06 22:38:44,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 414 flow [2021-12-06 22:38:44,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 99 transitions, 410 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-06 22:38:44,945 INFO L242 Difference]: Finished difference. Result has 88 places, 84 transitions, 338 flow [2021-12-06 22:38:44,946 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2021-12-06 22:38:44,946 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 16 predicate places. [2021-12-06 22:38:44,947 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 338 flow [2021-12-06 22:38:44,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 64.1) internal successors, (641), 10 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:44,947 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:38:44,947 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:38:44,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:38:45,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 22:38:45,149 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:38:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:38:45,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2134643199, now seen corresponding path program 3 times [2021-12-06 22:38:45,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:38:45,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070061092] [2021-12-06 22:38:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:38:45,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:38:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:38:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:45,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:38:45,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070061092] [2021-12-06 22:38:45,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070061092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:38:45,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071194719] [2021-12-06 22:38:45,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:38:45,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:45,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:38:45,265 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:38:45,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:38:45,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 22:38:45,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:38:45,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:38:45,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:38:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:45,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:38:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:45,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071194719] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:38:45,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:38:45,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2021-12-06 22:38:45,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529229337] [2021-12-06 22:38:45,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:38:45,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 22:38:45,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:38:45,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 22:38:45,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:38:45,621 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:38:45,623 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 338 flow. Second operand has 22 states, 22 states have (on average 59.54545454545455) internal successors, (1310), 22 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:45,623 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:38:45,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:38:45,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:38:46,842 INFO L129 PetriNetUnfolder]: 341/924 cut-off events. [2021-12-06 22:38:46,843 INFO L130 PetriNetUnfolder]: For 1534/1534 co-relation queries the response was YES. [2021-12-06 22:38:46,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2748 conditions, 924 events. 341/924 cut-off events. For 1534/1534 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5105 event pairs, 5 based on Foata normal form. 29/953 useless extension candidates. Maximal degree in co-relation 2735. Up to 175 conditions per place. [2021-12-06 22:38:46,850 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 126 selfloop transitions, 180 changer transitions 9/360 dead transitions. [2021-12-06 22:38:46,850 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 360 transitions, 2526 flow [2021-12-06 22:38:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-06 22:38:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-12-06 22:38:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4205 transitions. [2021-12-06 22:38:46,860 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7431954754330152 [2021-12-06 22:38:46,860 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4205 transitions. [2021-12-06 22:38:46,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4205 transitions. [2021-12-06 22:38:46,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:38:46,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4205 transitions. [2021-12-06 22:38:46,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 60.94202898550725) internal successors, (4205), 69 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:46,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 82.0) internal successors, (5740), 70 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:46,885 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 82.0) internal successors, (5740), 70 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:46,885 INFO L186 Difference]: Start difference. First operand has 88 places, 84 transitions, 338 flow. Second operand 69 states and 4205 transitions. [2021-12-06 22:38:46,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 360 transitions, 2526 flow [2021-12-06 22:38:46,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 360 transitions, 2514 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-12-06 22:38:46,896 INFO L242 Difference]: Finished difference. Result has 191 places, 245 transitions, 1966 flow [2021-12-06 22:38:46,896 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=1966, PETRI_PLACES=191, PETRI_TRANSITIONS=245} [2021-12-06 22:38:46,897 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 119 predicate places. [2021-12-06 22:38:46,897 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 245 transitions, 1966 flow [2021-12-06 22:38:46,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.54545454545455) internal successors, (1310), 22 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:46,898 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:38:46,898 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:38:46,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:38:47,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 22:38:47,099 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:38:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:38:47,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1131716833, now seen corresponding path program 4 times [2021-12-06 22:38:47,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:38:47,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102767600] [2021-12-06 22:38:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:38:47,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:38:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:38:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:47,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:38:47,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102767600] [2021-12-06 22:38:47,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102767600] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:38:47,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946261146] [2021-12-06 22:38:47,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:38:47,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:47,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:38:47,186 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:38:47,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:38:47,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:38:47,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:38:47,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 22:38:47,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:38:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:47,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:38:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:47,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946261146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:38:47,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:38:47,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2021-12-06 22:38:47,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417481118] [2021-12-06 22:38:47,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:38:47,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 22:38:47,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:38:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 22:38:47,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-12-06 22:38:47,599 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:38:47,600 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 245 transitions, 1966 flow. Second operand has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:47,600 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:38:47,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:38:47,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:38:48,398 INFO L129 PetriNetUnfolder]: 521/1417 cut-off events. [2021-12-06 22:38:48,398 INFO L130 PetriNetUnfolder]: For 34566/34566 co-relation queries the response was YES. [2021-12-06 22:38:48,407 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8022 conditions, 1417 events. 521/1417 cut-off events. For 34566/34566 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 9224 event pairs, 3 based on Foata normal form. 31/1447 useless extension candidates. Maximal degree in co-relation 7973. Up to 290 conditions per place. [2021-12-06 22:38:48,420 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 157 selfloop transitions, 287 changer transitions 7/496 dead transitions. [2021-12-06 22:38:48,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 496 transitions, 5587 flow [2021-12-06 22:38:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 22:38:48,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-06 22:38:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2387 transitions. [2021-12-06 22:38:48,425 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7464040025015635 [2021-12-06 22:38:48,425 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2387 transitions. [2021-12-06 22:38:48,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2387 transitions. [2021-12-06 22:38:48,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:38:48,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2387 transitions. [2021-12-06 22:38:48,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 61.205128205128204) internal successors, (2387), 39 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:48,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:48,439 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:48,439 INFO L186 Difference]: Start difference. First operand has 191 places, 245 transitions, 1966 flow. Second operand 39 states and 2387 transitions. [2021-12-06 22:38:48,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 496 transitions, 5587 flow [2021-12-06 22:38:48,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 496 transitions, 5042 flow, removed 195 selfloop flow, removed 5 redundant places. [2021-12-06 22:38:48,500 INFO L242 Difference]: Finished difference. Result has 237 places, 404 transitions, 4532 flow [2021-12-06 22:38:48,500 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4532, PETRI_PLACES=237, PETRI_TRANSITIONS=404} [2021-12-06 22:38:48,501 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 165 predicate places. [2021-12-06 22:38:48,501 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 404 transitions, 4532 flow [2021-12-06 22:38:48,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:48,502 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:38:48,502 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:38:48,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:38:48,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:48,703 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:38:48,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:38:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash -360678591, now seen corresponding path program 5 times [2021-12-06 22:38:48,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:38:48,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143978748] [2021-12-06 22:38:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:38:48,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:38:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:38:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:48,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:38:48,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143978748] [2021-12-06 22:38:48,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143978748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:38:48,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200811484] [2021-12-06 22:38:48,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:38:48,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:48,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:38:48,863 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:38:48,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:38:48,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 22:38:48,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:38:48,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:38:48,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:38:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:49,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:38:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:49,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200811484] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:38:49,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:38:49,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2021-12-06 22:38:49,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987273771] [2021-12-06 22:38:49,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:38:49,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:38:49,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:38:49,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:38:49,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:38:49,147 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:38:49,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 404 transitions, 4532 flow. Second operand has 20 states, 20 states have (on average 59.25) internal successors, (1185), 20 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:49,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:38:49,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:38:49,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:38:50,252 INFO L129 PetriNetUnfolder]: 708/2099 cut-off events. [2021-12-06 22:38:50,252 INFO L130 PetriNetUnfolder]: For 51745/51745 co-relation queries the response was YES. [2021-12-06 22:38:50,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12324 conditions, 2099 events. 708/2099 cut-off events. For 51745/51745 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16110 event pairs, 15 based on Foata normal form. 31/2122 useless extension candidates. Maximal degree in co-relation 12263. Up to 360 conditions per place. [2021-12-06 22:38:50,279 INFO L132 encePairwiseOnDemand]: 69/82 looper letters, 233 selfloop transitions, 439 changer transitions 19/736 dead transitions. [2021-12-06 22:38:50,280 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 736 transitions, 9640 flow [2021-12-06 22:38:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 22:38:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-12-06 22:38:50,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 4073 transitions. [2021-12-06 22:38:50,284 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.741354204586822 [2021-12-06 22:38:50,284 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 4073 transitions. [2021-12-06 22:38:50,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 4073 transitions. [2021-12-06 22:38:50,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:38:50,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 4073 transitions. [2021-12-06 22:38:50,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 60.791044776119406) internal successors, (4073), 67 states have internal predecessors, (4073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:50,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 82.0) internal successors, (5576), 68 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:50,298 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 82.0) internal successors, (5576), 68 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:50,298 INFO L186 Difference]: Start difference. First operand has 237 places, 404 transitions, 4532 flow. Second operand 67 states and 4073 transitions. [2021-12-06 22:38:50,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 736 transitions, 9640 flow [2021-12-06 22:38:50,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 736 transitions, 8645 flow, removed 472 selfloop flow, removed 9 redundant places. [2021-12-06 22:38:50,439 INFO L242 Difference]: Finished difference. Result has 317 places, 592 transitions, 7602 flow [2021-12-06 22:38:50,439 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=3847, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=7602, PETRI_PLACES=317, PETRI_TRANSITIONS=592} [2021-12-06 22:38:50,440 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 245 predicate places. [2021-12-06 22:38:50,440 INFO L470 AbstractCegarLoop]: Abstraction has has 317 places, 592 transitions, 7602 flow [2021-12-06 22:38:50,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.25) internal successors, (1185), 20 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:50,440 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:38:50,440 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:38:50,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:38:50,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 22:38:50,642 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:38:50,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:38:50,644 INFO L85 PathProgramCache]: Analyzing trace with hash 556953787, now seen corresponding path program 6 times [2021-12-06 22:38:50,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:38:50,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246861538] [2021-12-06 22:38:50,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:38:50,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:38:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:38:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:50,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:38:50,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246861538] [2021-12-06 22:38:50,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246861538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:38:50,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3841382] [2021-12-06 22:38:50,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:38:50,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:50,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:38:50,794 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:38:50,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:38:50,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 22:38:50,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:38:50,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:38:50,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:38:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:50,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:38:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:51,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3841382] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:38:51,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:38:51,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2021-12-06 22:38:51,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611975264] [2021-12-06 22:38:51,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:38:51,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 22:38:51,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:38:51,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 22:38:51,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:38:51,155 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:38:51,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 592 transitions, 7602 flow. Second operand has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:51,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:38:51,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:38:51,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:38:52,221 INFO L129 PetriNetUnfolder]: 840/2458 cut-off events. [2021-12-06 22:38:52,221 INFO L130 PetriNetUnfolder]: For 42340/42340 co-relation queries the response was YES. [2021-12-06 22:38:52,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14598 conditions, 2458 events. 840/2458 cut-off events. For 42340/42340 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19700 event pairs, 14 based on Foata normal form. 1/2455 useless extension candidates. Maximal degree in co-relation 14516. Up to 440 conditions per place. [2021-12-06 22:38:52,254 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 321 selfloop transitions, 521 changer transitions 17/904 dead transitions. [2021-12-06 22:38:52,255 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 904 transitions, 13698 flow [2021-12-06 22:38:52,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 22:38:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-06 22:38:52,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2515 transitions. [2021-12-06 22:38:52,257 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7480666270077335 [2021-12-06 22:38:52,257 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2515 transitions. [2021-12-06 22:38:52,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2515 transitions. [2021-12-06 22:38:52,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:38:52,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2515 transitions. [2021-12-06 22:38:52,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.34146341463415) internal successors, (2515), 41 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:52,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:52,266 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:52,266 INFO L186 Difference]: Start difference. First operand has 317 places, 592 transitions, 7602 flow. Second operand 41 states and 2515 transitions. [2021-12-06 22:38:52,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 904 transitions, 13698 flow [2021-12-06 22:38:52,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 904 transitions, 13001 flow, removed 213 selfloop flow, removed 28 redundant places. [2021-12-06 22:38:52,551 INFO L242 Difference]: Finished difference. Result has 337 places, 752 transitions, 10690 flow [2021-12-06 22:38:52,552 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=7057, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=10690, PETRI_PLACES=337, PETRI_TRANSITIONS=752} [2021-12-06 22:38:52,552 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 265 predicate places. [2021-12-06 22:38:52,552 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 752 transitions, 10690 flow [2021-12-06 22:38:52,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:52,553 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:38:52,553 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:38:52,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:38:52,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:52,755 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:38:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:38:52,757 INFO L85 PathProgramCache]: Analyzing trace with hash -667796903, now seen corresponding path program 7 times [2021-12-06 22:38:52,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:38:52,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245779819] [2021-12-06 22:38:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:38:52,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:38:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:38:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:52,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:38:52,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245779819] [2021-12-06 22:38:52,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245779819] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:38:52,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537412883] [2021-12-06 22:38:52,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:38:52,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:52,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:38:52,852 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:38:52,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 22:38:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:38:52,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:38:52,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:38:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:53,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:38:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:53,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537412883] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:38:53,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:38:53,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-12-06 22:38:53,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938383237] [2021-12-06 22:38:53,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:38:53,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 22:38:53,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:38:53,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 22:38:53,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:38:53,182 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:38:53,183 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 752 transitions, 10690 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:53,183 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:38:53,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:38:53,184 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:38:54,063 INFO L129 PetriNetUnfolder]: 845/2458 cut-off events. [2021-12-06 22:38:54,063 INFO L130 PetriNetUnfolder]: For 42600/42600 co-relation queries the response was YES. [2021-12-06 22:38:54,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15242 conditions, 2458 events. 845/2458 cut-off events. For 42600/42600 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19526 event pairs, 67 based on Foata normal form. 1/2421 useless extension candidates. Maximal degree in co-relation 15156. Up to 440 conditions per place. [2021-12-06 22:38:54,100 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 334 selfloop transitions, 444 changer transitions 7/830 dead transitions. [2021-12-06 22:38:54,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 830 transitions, 13357 flow [2021-12-06 22:38:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 22:38:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-06 22:38:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1296 transitions. [2021-12-06 22:38:54,102 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7526132404181185 [2021-12-06 22:38:54,102 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1296 transitions. [2021-12-06 22:38:54,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1296 transitions. [2021-12-06 22:38:54,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:38:54,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1296 transitions. [2021-12-06 22:38:54,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:54,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:54,107 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:54,107 INFO L186 Difference]: Start difference. First operand has 337 places, 752 transitions, 10690 flow. Second operand 21 states and 1296 transitions. [2021-12-06 22:38:54,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 830 transitions, 13357 flow [2021-12-06 22:38:54,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 830 transitions, 13013 flow, removed 61 selfloop flow, removed 17 redundant places. [2021-12-06 22:38:54,401 INFO L242 Difference]: Finished difference. Result has 341 places, 778 transitions, 11704 flow [2021-12-06 22:38:54,402 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=10399, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11704, PETRI_PLACES=341, PETRI_TRANSITIONS=778} [2021-12-06 22:38:54,402 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 269 predicate places. [2021-12-06 22:38:54,402 INFO L470 AbstractCegarLoop]: Abstraction has has 341 places, 778 transitions, 11704 flow [2021-12-06 22:38:54,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:54,403 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:38:54,403 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:38:54,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 22:38:54,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:54,605 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:38:54,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:38:54,606 INFO L85 PathProgramCache]: Analyzing trace with hash -845710819, now seen corresponding path program 8 times [2021-12-06 22:38:54,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:38:54,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753783474] [2021-12-06 22:38:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:38:54,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:38:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:38:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:54,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:38:54,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753783474] [2021-12-06 22:38:54,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753783474] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:38:54,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064295890] [2021-12-06 22:38:54,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:38:54,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:54,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:38:54,708 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:38:54,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 22:38:54,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:38:54,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:38:54,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:38:54,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:38:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:54,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:38:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:55,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064295890] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:38:55,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:38:55,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2021-12-06 22:38:55,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924887139] [2021-12-06 22:38:55,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:38:55,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 22:38:55,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:38:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 22:38:55,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:38:55,009 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:38:55,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 778 transitions, 11704 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:55,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:38:55,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:38:55,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:38:56,570 INFO L129 PetriNetUnfolder]: 1271/3795 cut-off events. [2021-12-06 22:38:56,570 INFO L130 PetriNetUnfolder]: For 74168/74168 co-relation queries the response was YES. [2021-12-06 22:38:56,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24499 conditions, 3795 events. 1271/3795 cut-off events. For 74168/74168 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 33307 event pairs, 38 based on Foata normal form. 9/3789 useless extension candidates. Maximal degree in co-relation 24413. Up to 627 conditions per place. [2021-12-06 22:38:56,614 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 442 selfloop transitions, 810 changer transitions 14/1311 dead transitions. [2021-12-06 22:38:56,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1311 transitions, 22568 flow [2021-12-06 22:38:56,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 22:38:56,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-12-06 22:38:56,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2719 transitions. [2021-12-06 22:38:56,617 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7536031042128604 [2021-12-06 22:38:56,617 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2719 transitions. [2021-12-06 22:38:56,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2719 transitions. [2021-12-06 22:38:56,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:38:56,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2719 transitions. [2021-12-06 22:38:56,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 61.79545454545455) internal successors, (2719), 44 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:56,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 82.0) internal successors, (3690), 45 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:56,624 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 82.0) internal successors, (3690), 45 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:56,624 INFO L186 Difference]: Start difference. First operand has 341 places, 778 transitions, 11704 flow. Second operand 44 states and 2719 transitions. [2021-12-06 22:38:56,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1311 transitions, 22568 flow [2021-12-06 22:38:57,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1311 transitions, 21718 flow, removed 48 selfloop flow, removed 8 redundant places. [2021-12-06 22:38:57,097 INFO L242 Difference]: Finished difference. Result has 394 places, 1095 transitions, 19168 flow [2021-12-06 22:38:57,098 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=11175, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=19168, PETRI_PLACES=394, PETRI_TRANSITIONS=1095} [2021-12-06 22:38:57,099 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 322 predicate places. [2021-12-06 22:38:57,099 INFO L470 AbstractCegarLoop]: Abstraction has has 394 places, 1095 transitions, 19168 flow [2021-12-06 22:38:57,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:57,099 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:38:57,099 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:38:57,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 22:38:57,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:57,301 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:38:57,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:38:57,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1655063311, now seen corresponding path program 9 times [2021-12-06 22:38:57,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:38:57,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092397229] [2021-12-06 22:38:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:38:57,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:38:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:38:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:57,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:38:57,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092397229] [2021-12-06 22:38:57,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092397229] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:38:57,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040942665] [2021-12-06 22:38:57,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:38:57,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:38:57,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:38:57,369 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:38:57,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 22:38:57,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 22:38:57,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:38:57,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:38:57,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:38:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:57,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:38:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:38:57,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040942665] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:38:57,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:38:57,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2021-12-06 22:38:57,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872456047] [2021-12-06 22:38:57,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:38:57,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 22:38:57,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:38:57,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 22:38:57,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:38:57,662 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:38:57,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1095 transitions, 19168 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:57,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:38:57,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:38:57,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:38:59,801 INFO L129 PetriNetUnfolder]: 1238/3662 cut-off events. [2021-12-06 22:38:59,801 INFO L130 PetriNetUnfolder]: For 104320/104320 co-relation queries the response was YES. [2021-12-06 22:38:59,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25738 conditions, 3662 events. 1238/3662 cut-off events. For 104320/104320 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 31877 event pairs, 42 based on Foata normal form. 43/3688 useless extension candidates. Maximal degree in co-relation 25633. Up to 653 conditions per place. [2021-12-06 22:38:59,857 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 296 selfloop transitions, 970 changer transitions 3/1314 dead transitions. [2021-12-06 22:38:59,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 1314 transitions, 24260 flow [2021-12-06 22:38:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-06 22:38:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-12-06 22:38:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3835 transitions. [2021-12-06 22:38:59,862 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7423538521099496 [2021-12-06 22:38:59,862 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3835 transitions. [2021-12-06 22:38:59,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3835 transitions. [2021-12-06 22:38:59,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:38:59,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3835 transitions. [2021-12-06 22:38:59,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.87301587301587) internal successors, (3835), 63 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:59,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:59,873 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:38:59,873 INFO L186 Difference]: Start difference. First operand has 394 places, 1095 transitions, 19168 flow. Second operand 63 states and 3835 transitions. [2021-12-06 22:38:59,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 1314 transitions, 24260 flow [2021-12-06 22:39:00,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1314 transitions, 23605 flow, removed 111 selfloop flow, removed 20 redundant places. [2021-12-06 22:39:00,555 INFO L242 Difference]: Finished difference. Result has 442 places, 1183 transitions, 22741 flow [2021-12-06 22:39:00,556 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17960, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=861, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=22741, PETRI_PLACES=442, PETRI_TRANSITIONS=1183} [2021-12-06 22:39:00,556 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 370 predicate places. [2021-12-06 22:39:00,557 INFO L470 AbstractCegarLoop]: Abstraction has has 442 places, 1183 transitions, 22741 flow [2021-12-06 22:39:00,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:00,557 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:39:00,557 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:00,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 22:39:00,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:00,759 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:39:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash 108431499, now seen corresponding path program 10 times [2021-12-06 22:39:00,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:00,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995972075] [2021-12-06 22:39:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:00,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:00,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:00,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995972075] [2021-12-06 22:39:00,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995972075] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:00,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593054424] [2021-12-06 22:39:00,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:39:00,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:00,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:00,845 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:00,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 22:39:00,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:39:00,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:39:00,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:39:00,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:01,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:39:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:01,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593054424] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:39:01,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:39:01,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2021-12-06 22:39:01,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292793443] [2021-12-06 22:39:01,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:39:01,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 22:39:01,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:01,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 22:39:01,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:39:01,181 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:39:01,181 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1183 transitions, 22741 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:01,182 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:39:01,182 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:39:01,182 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:39:04,143 INFO L129 PetriNetUnfolder]: 1990/6158 cut-off events. [2021-12-06 22:39:04,144 INFO L130 PetriNetUnfolder]: For 235528/235528 co-relation queries the response was YES. [2021-12-06 22:39:04,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48999 conditions, 6158 events. 1990/6158 cut-off events. For 235528/235528 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 61327 event pairs, 89 based on Foata normal form. 9/6138 useless extension candidates. Maximal degree in co-relation 48887. Up to 1713 conditions per place. [2021-12-06 22:39:04,243 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1224 selfloop transitions, 671 changer transitions 16/1956 dead transitions. [2021-12-06 22:39:04,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 1956 transitions, 41297 flow [2021-12-06 22:39:04,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 22:39:04,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-06 22:39:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2793 transitions. [2021-12-06 22:39:04,247 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7569105691056911 [2021-12-06 22:39:04,247 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2793 transitions. [2021-12-06 22:39:04,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2793 transitions. [2021-12-06 22:39:04,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:39:04,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2793 transitions. [2021-12-06 22:39:04,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 62.06666666666667) internal successors, (2793), 45 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:04,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 82.0) internal successors, (3772), 46 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:04,255 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 82.0) internal successors, (3772), 46 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:04,255 INFO L186 Difference]: Start difference. First operand has 442 places, 1183 transitions, 22741 flow. Second operand 45 states and 2793 transitions. [2021-12-06 22:39:04,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 1956 transitions, 41297 flow [2021-12-06 22:39:06,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1956 transitions, 40421 flow, removed 108 selfloop flow, removed 36 redundant places. [2021-12-06 22:39:06,215 INFO L242 Difference]: Finished difference. Result has 475 places, 1656 transitions, 34486 flow [2021-12-06 22:39:06,216 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=22087, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=724, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=34486, PETRI_PLACES=475, PETRI_TRANSITIONS=1656} [2021-12-06 22:39:06,216 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 403 predicate places. [2021-12-06 22:39:06,217 INFO L470 AbstractCegarLoop]: Abstraction has has 475 places, 1656 transitions, 34486 flow [2021-12-06 22:39:06,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:06,217 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:39:06,217 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:06,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 22:39:06,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 22:39:06,418 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:39:06,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:06,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1303336741, now seen corresponding path program 11 times [2021-12-06 22:39:06,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:06,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866459704] [2021-12-06 22:39:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:06,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:06,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:06,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866459704] [2021-12-06 22:39:06,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866459704] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:06,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140683622] [2021-12-06 22:39:06,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:39:06,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:06,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:06,487 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:06,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 22:39:06,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 22:39:06,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:39:06,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:39:06,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:06,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:39:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:06,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140683622] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:39:06,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:39:06,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-12-06 22:39:06,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886454489] [2021-12-06 22:39:06,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:39:06,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 22:39:06,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:06,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 22:39:06,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:39:06,763 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:39:06,764 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 1656 transitions, 34486 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:06,764 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:39:06,764 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:39:06,764 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:39:10,541 INFO L129 PetriNetUnfolder]: 2238/6842 cut-off events. [2021-12-06 22:39:10,541 INFO L130 PetriNetUnfolder]: For 369460/369460 co-relation queries the response was YES. [2021-12-06 22:39:10,607 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60917 conditions, 6842 events. 2238/6842 cut-off events. For 369460/369460 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 69113 event pairs, 167 based on Foata normal form. 1/6820 useless extension candidates. Maximal degree in co-relation 60781. Up to 2911 conditions per place. [2021-12-06 22:39:10,649 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1463 selfloop transitions, 438 changer transitions 6/1952 dead transitions. [2021-12-06 22:39:10,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 1952 transitions, 44351 flow [2021-12-06 22:39:10,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:39:10,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-06 22:39:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1655 transitions. [2021-12-06 22:39:10,651 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7475158084914183 [2021-12-06 22:39:10,651 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1655 transitions. [2021-12-06 22:39:10,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1655 transitions. [2021-12-06 22:39:10,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:39:10,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1655 transitions. [2021-12-06 22:39:10,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 61.2962962962963) internal successors, (1655), 27 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:10,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 82.0) internal successors, (2296), 28 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:10,655 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 82.0) internal successors, (2296), 28 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:10,655 INFO L186 Difference]: Start difference. First operand has 475 places, 1656 transitions, 34486 flow. Second operand 27 states and 1655 transitions. [2021-12-06 22:39:10,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 1952 transitions, 44351 flow [2021-12-06 22:39:13,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 1952 transitions, 43061 flow, removed 324 selfloop flow, removed 10 redundant places. [2021-12-06 22:39:13,899 INFO L242 Difference]: Finished difference. Result has 506 places, 1796 transitions, 38021 flow [2021-12-06 22:39:13,901 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=33343, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=38021, PETRI_PLACES=506, PETRI_TRANSITIONS=1796} [2021-12-06 22:39:13,901 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 434 predicate places. [2021-12-06 22:39:13,901 INFO L470 AbstractCegarLoop]: Abstraction has has 506 places, 1796 transitions, 38021 flow [2021-12-06 22:39:13,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:13,902 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:39:13,902 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:13,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 22:39:14,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 22:39:14,103 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:39:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1738579305, now seen corresponding path program 12 times [2021-12-06 22:39:14,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:14,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454396680] [2021-12-06 22:39:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:14,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:14,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:14,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454396680] [2021-12-06 22:39:14,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454396680] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:14,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513084200] [2021-12-06 22:39:14,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:39:14,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:14,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:14,169 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:14,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 22:39:14,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 22:39:14,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:39:14,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:39:14,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:14,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:39:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:14,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513084200] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:39:14,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:39:14,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-12-06 22:39:14,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020365072] [2021-12-06 22:39:14,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:39:14,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 22:39:14,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:14,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 22:39:14,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:39:14,452 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:39:14,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 1796 transitions, 38021 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:14,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:39:14,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:39:14,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:39:20,292 INFO L129 PetriNetUnfolder]: 2969/9466 cut-off events. [2021-12-06 22:39:20,293 INFO L130 PetriNetUnfolder]: For 542766/542766 co-relation queries the response was YES. [2021-12-06 22:39:20,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84294 conditions, 9466 events. 2969/9466 cut-off events. For 542766/542766 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 103510 event pairs, 187 based on Foata normal form. 6/9431 useless extension candidates. Maximal degree in co-relation 84145. Up to 2695 conditions per place. [2021-12-06 22:39:20,448 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1576 selfloop transitions, 1018 changer transitions 4/2643 dead transitions. [2021-12-06 22:39:20,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 2643 transitions, 60823 flow [2021-12-06 22:39:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 22:39:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-12-06 22:39:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3669 transitions. [2021-12-06 22:39:20,451 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7457317073170732 [2021-12-06 22:39:20,451 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3669 transitions. [2021-12-06 22:39:20,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3669 transitions. [2021-12-06 22:39:20,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:39:20,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3669 transitions. [2021-12-06 22:39:20,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 61.15) internal successors, (3669), 60 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:20,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 82.0) internal successors, (5002), 61 states have internal predecessors, (5002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:20,459 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 82.0) internal successors, (5002), 61 states have internal predecessors, (5002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:20,459 INFO L186 Difference]: Start difference. First operand has 506 places, 1796 transitions, 38021 flow. Second operand 60 states and 3669 transitions. [2021-12-06 22:39:20,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 2643 transitions, 60823 flow [2021-12-06 22:39:25,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 2643 transitions, 60731 flow, removed 19 selfloop flow, removed 9 redundant places. [2021-12-06 22:39:25,722 INFO L242 Difference]: Finished difference. Result has 581 places, 2280 transitions, 53290 flow [2021-12-06 22:39:25,723 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=37931, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=580, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1020, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=53290, PETRI_PLACES=581, PETRI_TRANSITIONS=2280} [2021-12-06 22:39:25,723 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 509 predicate places. [2021-12-06 22:39:25,723 INFO L470 AbstractCegarLoop]: Abstraction has has 581 places, 2280 transitions, 53290 flow [2021-12-06 22:39:25,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:25,724 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:39:25,724 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:25,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 22:39:25,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 22:39:25,925 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:39:25,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:25,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1479700621, now seen corresponding path program 13 times [2021-12-06 22:39:25,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:25,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857138993] [2021-12-06 22:39:25,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:25,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:26,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:26,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857138993] [2021-12-06 22:39:26,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857138993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:26,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153150191] [2021-12-06 22:39:26,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:39:26,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:26,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:26,008 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:26,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 22:39:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:26,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:39:26,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:26,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:39:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:26,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153150191] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:39:26,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:39:26,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-12-06 22:39:26,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744126483] [2021-12-06 22:39:26,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:39:26,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 22:39:26,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:26,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 22:39:26,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:39:26,262 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:39:26,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 2280 transitions, 53290 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:26,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:39:26,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:39:26,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:39:32,656 INFO L129 PetriNetUnfolder]: 2970/9376 cut-off events. [2021-12-06 22:39:32,656 INFO L130 PetriNetUnfolder]: For 642942/642942 co-relation queries the response was YES. [2021-12-06 22:39:32,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90315 conditions, 9376 events. 2970/9376 cut-off events. For 642942/642942 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 101920 event pairs, 222 based on Foata normal form. 1/9346 useless extension candidates. Maximal degree in co-relation 90140. Up to 4359 conditions per place. [2021-12-06 22:39:32,857 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1848 selfloop transitions, 416 changer transitions 5/2314 dead transitions. [2021-12-06 22:39:32,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 2314 transitions, 58575 flow [2021-12-06 22:39:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 22:39:32,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 22:39:32,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1100 transitions. [2021-12-06 22:39:32,859 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7452574525745257 [2021-12-06 22:39:32,859 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1100 transitions. [2021-12-06 22:39:32,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1100 transitions. [2021-12-06 22:39:32,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:39:32,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1100 transitions. [2021-12-06 22:39:32,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.111111111111114) internal successors, (1100), 18 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:32,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:32,862 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:32,863 INFO L186 Difference]: Start difference. First operand has 581 places, 2280 transitions, 53290 flow. Second operand 18 states and 1100 transitions. [2021-12-06 22:39:32,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 2314 transitions, 58575 flow [2021-12-06 22:39:40,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 2314 transitions, 58009 flow, removed 232 selfloop flow, removed 18 redundant places. [2021-12-06 22:39:40,066 INFO L242 Difference]: Finished difference. Result has 582 places, 2283 transitions, 53925 flow [2021-12-06 22:39:40,068 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=52726, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1866, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=53925, PETRI_PLACES=582, PETRI_TRANSITIONS=2283} [2021-12-06 22:39:40,068 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 510 predicate places. [2021-12-06 22:39:40,068 INFO L470 AbstractCegarLoop]: Abstraction has has 582 places, 2283 transitions, 53925 flow [2021-12-06 22:39:40,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:40,069 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:39:40,069 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:40,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 22:39:40,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 22:39:40,270 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:39:40,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:40,271 INFO L85 PathProgramCache]: Analyzing trace with hash -456514995, now seen corresponding path program 14 times [2021-12-06 22:39:40,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:40,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362982894] [2021-12-06 22:39:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:40,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:40,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:40,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362982894] [2021-12-06 22:39:40,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362982894] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:40,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399021261] [2021-12-06 22:39:40,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:39:40,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:40,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:40,343 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:40,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 22:39:40,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:39:40,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:39:40,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:39:40,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:40,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:39:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:40,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399021261] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:39:40,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:39:40,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2021-12-06 22:39:40,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827525384] [2021-12-06 22:39:40,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:39:40,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 22:39:40,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:40,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 22:39:40,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:39:40,628 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:39:40,629 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 2283 transitions, 53925 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:40,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:39:40,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:39:40,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:39:47,732 INFO L129 PetriNetUnfolder]: 2976/9557 cut-off events. [2021-12-06 22:39:47,732 INFO L130 PetriNetUnfolder]: For 676470/676470 co-relation queries the response was YES. [2021-12-06 22:39:47,849 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92581 conditions, 9557 events. 2976/9557 cut-off events. For 676470/676470 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 104941 event pairs, 211 based on Foata normal form. 79/9599 useless extension candidates. Maximal degree in co-relation 92407. Up to 1439 conditions per place. [2021-12-06 22:39:47,907 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 811 selfloop transitions, 1740 changer transitions 6/2602 dead transitions. [2021-12-06 22:39:47,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 2602 transitions, 65181 flow [2021-12-06 22:39:47,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 22:39:47,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-12-06 22:39:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3626 transitions. [2021-12-06 22:39:47,911 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7494832575444399 [2021-12-06 22:39:47,911 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3626 transitions. [2021-12-06 22:39:47,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3626 transitions. [2021-12-06 22:39:47,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:39:47,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3626 transitions. [2021-12-06 22:39:47,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 61.45762711864407) internal successors, (3626), 59 states have internal predecessors, (3626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:47,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:47,918 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:47,918 INFO L186 Difference]: Start difference. First operand has 582 places, 2283 transitions, 53925 flow. Second operand 59 states and 3626 transitions. [2021-12-06 22:39:47,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 2602 transitions, 65181 flow [2021-12-06 22:39:55,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 2602 transitions, 64686 flow, removed 36 selfloop flow, removed 14 redundant places. [2021-12-06 22:39:55,099 INFO L242 Difference]: Finished difference. Result has 625 places, 2405 transitions, 61425 flow [2021-12-06 22:39:55,101 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=52616, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1584, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=61425, PETRI_PLACES=625, PETRI_TRANSITIONS=2405} [2021-12-06 22:39:55,101 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 553 predicate places. [2021-12-06 22:39:55,101 INFO L470 AbstractCegarLoop]: Abstraction has has 625 places, 2405 transitions, 61425 flow [2021-12-06 22:39:55,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:55,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:39:55,101 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:39:55,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 22:39:55,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 22:39:55,303 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:39:55,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:39:55,304 INFO L85 PathProgramCache]: Analyzing trace with hash -490468571, now seen corresponding path program 15 times [2021-12-06 22:39:55,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:39:55,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010487866] [2021-12-06 22:39:55,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:39:55,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:39:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:39:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:55,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:39:55,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010487866] [2021-12-06 22:39:55,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010487866] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:39:55,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814510982] [2021-12-06 22:39:55,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:39:55,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:39:55,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:39:55,410 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:39:55,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 22:39:55,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 22:39:55,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:39:55,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:39:55,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:39:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:55,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:39:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:39:55,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814510982] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:39:55,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:39:55,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2021-12-06 22:39:55,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290239409] [2021-12-06 22:39:55,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:39:55,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 22:39:55,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:39:55,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 22:39:55,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:39:55,689 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:39:55,690 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 2405 transitions, 61425 flow. Second operand has 23 states, 23 states have (on average 59.69565217391305) internal successors, (1373), 23 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:39:55,690 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:39:55,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:39:55,690 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:40:03,256 INFO L129 PetriNetUnfolder]: 3177/10062 cut-off events. [2021-12-06 22:40:03,257 INFO L130 PetriNetUnfolder]: For 862705/862705 co-relation queries the response was YES. [2021-12-06 22:40:03,389 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103368 conditions, 10062 events. 3177/10062 cut-off events. For 862705/862705 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 110904 event pairs, 180 based on Foata normal form. 120/10164 useless extension candidates. Maximal degree in co-relation 103189. Up to 3295 conditions per place. [2021-12-06 22:40:03,457 INFO L132 encePairwiseOnDemand]: 69/82 looper letters, 1153 selfloop transitions, 1589 changer transitions 13/2800 dead transitions. [2021-12-06 22:40:03,457 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 2800 transitions, 75128 flow [2021-12-06 22:40:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 22:40:03,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-06 22:40:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2495 transitions. [2021-12-06 22:40:03,460 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.760670731707317 [2021-12-06 22:40:03,460 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2495 transitions. [2021-12-06 22:40:03,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2495 transitions. [2021-12-06 22:40:03,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:40:03,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2495 transitions. [2021-12-06 22:40:03,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 62.375) internal successors, (2495), 40 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:03,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 82.0) internal successors, (3362), 41 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:03,465 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 82.0) internal successors, (3362), 41 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:03,465 INFO L186 Difference]: Start difference. First operand has 625 places, 2405 transitions, 61425 flow. Second operand 40 states and 2495 transitions. [2021-12-06 22:40:03,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 2800 transitions, 75128 flow [2021-12-06 22:40:11,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 633 places, 2800 transitions, 73151 flow, removed 43 selfloop flow, removed 30 redundant places. [2021-12-06 22:40:11,174 INFO L242 Difference]: Finished difference. Result has 663 places, 2573 transitions, 70051 flow [2021-12-06 22:40:11,176 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=59602, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=920, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=70051, PETRI_PLACES=663, PETRI_TRANSITIONS=2573} [2021-12-06 22:40:11,176 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 591 predicate places. [2021-12-06 22:40:11,176 INFO L470 AbstractCegarLoop]: Abstraction has has 663 places, 2573 transitions, 70051 flow [2021-12-06 22:40:11,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.69565217391305) internal successors, (1373), 23 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:11,176 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:40:11,176 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:40:11,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 22:40:11,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:40:11,378 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:40:11,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:40:11,379 INFO L85 PathProgramCache]: Analyzing trace with hash -322321665, now seen corresponding path program 16 times [2021-12-06 22:40:11,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:40:11,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820412219] [2021-12-06 22:40:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:11,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:40:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:40:11,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:40:11,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820412219] [2021-12-06 22:40:11,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820412219] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:40:11,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131581374] [2021-12-06 22:40:11,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:40:11,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:40:11,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:40:11,472 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:40:11,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 22:40:11,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:40:11,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:40:11,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:40:11,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:40:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:40:11,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:40:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:40:11,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131581374] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:40:11,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:40:11,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-12-06 22:40:11,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735116510] [2021-12-06 22:40:11,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:40:11,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 22:40:11,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:40:11,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 22:40:11,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:40:11,726 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:40:11,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 663 places, 2573 transitions, 70051 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:11,727 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:40:11,727 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:40:11,727 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:40:21,080 INFO L129 PetriNetUnfolder]: 3477/10973 cut-off events. [2021-12-06 22:40:21,080 INFO L130 PetriNetUnfolder]: For 1343669/1343669 co-relation queries the response was YES. [2021-12-06 22:40:21,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 128217 conditions, 10973 events. 3477/10973 cut-off events. For 1343669/1343669 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 122666 event pairs, 302 based on Foata normal form. 4/10934 useless extension candidates. Maximal degree in co-relation 128013. Up to 3819 conditions per place. [2021-12-06 22:40:21,339 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2051 selfloop transitions, 829 changer transitions 7/2932 dead transitions. [2021-12-06 22:40:21,339 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 699 places, 2932 transitions, 84845 flow [2021-12-06 22:40:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 22:40:21,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-06 22:40:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2265 transitions. [2021-12-06 22:40:21,342 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7465392221489783 [2021-12-06 22:40:21,342 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2265 transitions. [2021-12-06 22:40:21,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2265 transitions. [2021-12-06 22:40:21,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:40:21,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2265 transitions. [2021-12-06 22:40:21,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 61.21621621621622) internal successors, (2265), 37 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:21,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 82.0) internal successors, (3116), 38 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:21,346 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 82.0) internal successors, (3116), 38 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:21,346 INFO L186 Difference]: Start difference. First operand has 663 places, 2573 transitions, 70051 flow. Second operand 37 states and 2265 transitions. [2021-12-06 22:40:21,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 699 places, 2932 transitions, 84845 flow [2021-12-06 22:40:32,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 689 places, 2932 transitions, 81666 flow, removed 267 selfloop flow, removed 10 redundant places. [2021-12-06 22:40:32,388 INFO L242 Difference]: Finished difference. Result has 703 places, 2719 transitions, 74187 flow [2021-12-06 22:40:32,390 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=67100, PETRI_DIFFERENCE_MINUEND_PLACES=653, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=694, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=74187, PETRI_PLACES=703, PETRI_TRANSITIONS=2719} [2021-12-06 22:40:32,391 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 631 predicate places. [2021-12-06 22:40:32,391 INFO L470 AbstractCegarLoop]: Abstraction has has 703 places, 2719 transitions, 74187 flow [2021-12-06 22:40:32,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:32,391 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:40:32,391 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:40:32,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 22:40:32,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:40:32,592 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:40:32,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:40:32,593 INFO L85 PathProgramCache]: Analyzing trace with hash 192172815, now seen corresponding path program 17 times [2021-12-06 22:40:32,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:40:32,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30489752] [2021-12-06 22:40:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:32,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:40:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:40:32,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:40:32,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30489752] [2021-12-06 22:40:32,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30489752] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:40:32,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254536798] [2021-12-06 22:40:32,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:40:32,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:40:32,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:40:32,684 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:40:32,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 22:40:32,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 22:40:32,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:40:32,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:40:32,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:40:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:40:32,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:40:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:40:32,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254536798] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:40:32,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:40:32,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-12-06 22:40:32,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919254519] [2021-12-06 22:40:32,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:40:32,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 22:40:32,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:40:32,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 22:40:32,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:40:32,974 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:40:32,975 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 2719 transitions, 74187 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:32,975 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:40:32,975 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:40:32,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:40:43,340 INFO L129 PetriNetUnfolder]: 3702/11931 cut-off events. [2021-12-06 22:40:43,340 INFO L130 PetriNetUnfolder]: For 1572295/1572295 co-relation queries the response was YES. [2021-12-06 22:40:43,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 139882 conditions, 11931 events. 3702/11931 cut-off events. For 1572295/1572295 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 136276 event pairs, 242 based on Foata normal form. 7/11879 useless extension candidates. Maximal degree in co-relation 139671. Up to 2690 conditions per place. [2021-12-06 22:40:43,623 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1741 selfloop transitions, 1311 changer transitions 7/3104 dead transitions. [2021-12-06 22:40:43,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 741 places, 3104 transitions, 89981 flow [2021-12-06 22:40:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 22:40:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-12-06 22:40:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2648 transitions. [2021-12-06 22:40:43,626 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7509926262053318 [2021-12-06 22:40:43,626 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2648 transitions. [2021-12-06 22:40:43,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2648 transitions. [2021-12-06 22:40:43,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:40:43,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2648 transitions. [2021-12-06 22:40:43,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 61.58139534883721) internal successors, (2648), 43 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:43,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 82.0) internal successors, (3608), 44 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:43,631 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 82.0) internal successors, (3608), 44 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:43,632 INFO L186 Difference]: Start difference. First operand has 703 places, 2719 transitions, 74187 flow. Second operand 43 states and 2648 transitions. [2021-12-06 22:40:43,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 741 places, 3104 transitions, 89981 flow [2021-12-06 22:40:56,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 729 places, 3104 transitions, 89382 flow, removed 245 selfloop flow, removed 12 redundant places. [2021-12-06 22:40:56,499 INFO L242 Difference]: Finished difference. Result has 743 places, 2880 transitions, 82719 flow [2021-12-06 22:40:56,501 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=73724, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=82719, PETRI_PLACES=743, PETRI_TRANSITIONS=2880} [2021-12-06 22:40:56,502 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 671 predicate places. [2021-12-06 22:40:56,502 INFO L470 AbstractCegarLoop]: Abstraction has has 743 places, 2880 transitions, 82719 flow [2021-12-06 22:40:56,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:56,502 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:40:56,502 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:40:56,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 22:40:56,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 22:40:56,704 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:40:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:40:56,705 INFO L85 PathProgramCache]: Analyzing trace with hash -159620573, now seen corresponding path program 18 times [2021-12-06 22:40:56,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:40:56,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115278998] [2021-12-06 22:40:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:56,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:40:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:40:56,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:40:56,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115278998] [2021-12-06 22:40:56,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115278998] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:40:56,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35070080] [2021-12-06 22:40:56,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:40:56,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:40:56,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:40:56,796 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:40:56,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 22:40:56,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 22:40:56,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:40:56,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:40:56,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:40:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:40:56,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:40:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:40:57,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35070080] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:40:57,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:40:57,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-12-06 22:40:57,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145681294] [2021-12-06 22:40:57,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:40:57,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 22:40:57,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:40:57,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 22:40:57,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:40:57,081 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:40:57,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 2880 transitions, 82719 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:57,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:40:57,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:40:57,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:41:08,312 INFO L129 PetriNetUnfolder]: 3697/11801 cut-off events. [2021-12-06 22:41:08,312 INFO L130 PetriNetUnfolder]: For 1661017/1661017 co-relation queries the response was YES. [2021-12-06 22:41:08,508 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143788 conditions, 11801 events. 3697/11801 cut-off events. For 1661017/1661017 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 134016 event pairs, 235 based on Foata normal form. 1/11759 useless extension candidates. Maximal degree in co-relation 143565. Up to 5385 conditions per place. [2021-12-06 22:41:08,594 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2316 selfloop transitions, 543 changer transitions 4/2908 dead transitions. [2021-12-06 22:41:08,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 2908 transitions, 89281 flow [2021-12-06 22:41:08,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 22:41:08,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 22:41:08,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1100 transitions. [2021-12-06 22:41:08,596 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7452574525745257 [2021-12-06 22:41:08,596 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1100 transitions. [2021-12-06 22:41:08,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1100 transitions. [2021-12-06 22:41:08,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:41:08,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1100 transitions. [2021-12-06 22:41:08,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.111111111111114) internal successors, (1100), 18 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:08,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:08,598 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:08,599 INFO L186 Difference]: Start difference. First operand has 743 places, 2880 transitions, 82719 flow. Second operand 18 states and 1100 transitions. [2021-12-06 22:41:08,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 2908 transitions, 89281 flow [2021-12-06 22:41:22,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 743 places, 2908 transitions, 88738 flow, removed 173 selfloop flow, removed 14 redundant places. [2021-12-06 22:41:22,837 INFO L242 Difference]: Finished difference. Result has 747 places, 2880 transitions, 83287 flow [2021-12-06 22:41:22,839 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=82180, PETRI_DIFFERENCE_MINUEND_PLACES=726, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=83287, PETRI_PLACES=747, PETRI_TRANSITIONS=2880} [2021-12-06 22:41:22,840 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 675 predicate places. [2021-12-06 22:41:22,840 INFO L470 AbstractCegarLoop]: Abstraction has has 747 places, 2880 transitions, 83287 flow [2021-12-06 22:41:22,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:22,840 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:41:22,840 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:41:22,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 22:41:23,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 22:41:23,042 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:41:23,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:41:23,043 INFO L85 PathProgramCache]: Analyzing trace with hash -355170369, now seen corresponding path program 19 times [2021-12-06 22:41:23,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:41:23,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441956607] [2021-12-06 22:41:23,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:41:23,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:41:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:41:23,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:41:23,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441956607] [2021-12-06 22:41:23,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441956607] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:41:23,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862971906] [2021-12-06 22:41:23,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:41:23,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:41:23,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:41:23,113 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:41:23,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 22:41:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:23,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:41:23,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:41:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:41:23,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:41:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:41:23,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862971906] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:41:23,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:41:23,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2021-12-06 22:41:23,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404709308] [2021-12-06 22:41:23,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:41:23,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 22:41:23,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:41:23,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 22:41:23,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:41:23,373 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:41:23,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 747 places, 2880 transitions, 83287 flow. Second operand has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:23,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:41:23,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:41:23,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:41:35,162 INFO L129 PetriNetUnfolder]: 3850/12338 cut-off events. [2021-12-06 22:41:35,163 INFO L130 PetriNetUnfolder]: For 1774393/1774393 co-relation queries the response was YES. [2021-12-06 22:41:35,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 150876 conditions, 12338 events. 3850/12338 cut-off events. For 1774393/1774393 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 141409 event pairs, 253 based on Foata normal form. 7/12299 useless extension candidates. Maximal degree in co-relation 150652. Up to 4932 conditions per place. [2021-12-06 22:41:35,466 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2239 selfloop transitions, 804 changer transitions 2/3090 dead transitions. [2021-12-06 22:41:35,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 771 places, 3090 transitions, 95192 flow [2021-12-06 22:41:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:41:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-06 22:41:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1789 transitions. [2021-12-06 22:41:35,468 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7523128679562657 [2021-12-06 22:41:35,468 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1789 transitions. [2021-12-06 22:41:35,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1789 transitions. [2021-12-06 22:41:35,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:41:35,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1789 transitions. [2021-12-06 22:41:35,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 61.689655172413794) internal successors, (1789), 29 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:35,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 82.0) internal successors, (2460), 30 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:35,472 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 82.0) internal successors, (2460), 30 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:35,472 INFO L186 Difference]: Start difference. First operand has 747 places, 2880 transitions, 83287 flow. Second operand 29 states and 1789 transitions. [2021-12-06 22:41:35,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 771 places, 3090 transitions, 95192 flow [2021-12-06 22:41:49,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 754 places, 3090 transitions, 94015 flow, removed 21 selfloop flow, removed 17 redundant places. [2021-12-06 22:41:49,569 INFO L242 Difference]: Finished difference. Result has 762 places, 2976 transitions, 88316 flow [2021-12-06 22:41:49,571 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=82160, PETRI_DIFFERENCE_MINUEND_PLACES=726, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=721, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=88316, PETRI_PLACES=762, PETRI_TRANSITIONS=2976} [2021-12-06 22:41:49,572 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 690 predicate places. [2021-12-06 22:41:49,572 INFO L470 AbstractCegarLoop]: Abstraction has has 762 places, 2976 transitions, 88316 flow [2021-12-06 22:41:49,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:49,572 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:41:49,572 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:41:49,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 22:41:49,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 22:41:49,773 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:41:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:41:49,774 INFO L85 PathProgramCache]: Analyzing trace with hash -593479455, now seen corresponding path program 20 times [2021-12-06 22:41:49,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:41:49,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530967945] [2021-12-06 22:41:49,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:41:49,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:41:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:41:49,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:41:49,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530967945] [2021-12-06 22:41:49,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530967945] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:41:49,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54919651] [2021-12-06 22:41:49,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:41:49,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:41:49,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:41:49,851 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:41:49,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 22:41:49,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:41:49,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:41:49,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:41:49,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:41:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:41:50,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:41:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:41:50,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54919651] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:41:50,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:41:50,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-12-06 22:41:50,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849561294] [2021-12-06 22:41:50,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:41:50,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 22:41:50,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:41:50,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 22:41:50,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:41:50,114 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:41:50,114 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 2976 transitions, 88316 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:50,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:41:50,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:41:50,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:42:02,551 INFO L129 PetriNetUnfolder]: 3994/12858 cut-off events. [2021-12-06 22:42:02,551 INFO L130 PetriNetUnfolder]: For 2043231/2043231 co-relation queries the response was YES. [2021-12-06 22:42:02,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161771 conditions, 12858 events. 3994/12858 cut-off events. For 2043231/2043231 co-relation queries the response was YES. Maximal size of possible extension queue 886. Compared 148763 event pairs, 329 based on Foata normal form. 8/12818 useless extension candidates. Maximal degree in co-relation 161544. Up to 5304 conditions per place. [2021-12-06 22:42:02,870 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2346 selfloop transitions, 776 changer transitions 8/3175 dead transitions. [2021-12-06 22:42:02,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 3175 transitions, 100129 flow [2021-12-06 22:42:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 22:42:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-06 22:42:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1956 transitions. [2021-12-06 22:42:02,872 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7454268292682927 [2021-12-06 22:42:02,872 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1956 transitions. [2021-12-06 22:42:02,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1956 transitions. [2021-12-06 22:42:02,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:42:02,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1956 transitions. [2021-12-06 22:42:02,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 61.125) internal successors, (1956), 32 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:42:02,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 82.0) internal successors, (2706), 33 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) [2021-12-06 22:42:02,875 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 82.0) internal successors, (2706), 33 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) [2021-12-06 22:42:02,875 INFO L186 Difference]: Start difference. First operand has 762 places, 2976 transitions, 88316 flow. Second operand 32 states and 1956 transitions. [2021-12-06 22:42:02,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 3175 transitions, 100129 flow [2021-12-06 22:42:20,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 777 places, 3175 transitions, 98384 flow, removed 451 selfloop flow, removed 14 redundant places. [2021-12-06 22:42:20,468 INFO L242 Difference]: Finished difference. Result has 787 places, 3080 transitions, 92854 flow [2021-12-06 22:42:20,470 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=86594, PETRI_DIFFERENCE_MINUEND_PLACES=746, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2976, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=694, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=92854, PETRI_PLACES=787, PETRI_TRANSITIONS=3080} [2021-12-06 22:42:20,471 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 715 predicate places. [2021-12-06 22:42:20,471 INFO L470 AbstractCegarLoop]: Abstraction has has 787 places, 3080 transitions, 92854 flow [2021-12-06 22:42:20,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:42:20,471 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:42:20,471 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:42:20,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-06 22:42:20,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 22:42:20,673 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:42:20,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:42:20,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1566598221, now seen corresponding path program 21 times [2021-12-06 22:42:20,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:42:20,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365474087] [2021-12-06 22:42:20,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:42:20,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:42:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:42:20,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:42:20,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365474087] [2021-12-06 22:42:20,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365474087] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:42:20,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660014724] [2021-12-06 22:42:20,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:42:20,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:42:20,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:42:20,745 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:42:20,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 22:42:20,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 22:42:20,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:42:20,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:42:20,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:42:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:42:20,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:42:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:42:20,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660014724] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:42:20,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:42:20,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-12-06 22:42:20,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51297850] [2021-12-06 22:42:20,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:42:20,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 22:42:20,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:42:20,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 22:42:20,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:42:20,997 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:42:20,998 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 3080 transitions, 92854 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:42:20,998 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:42:20,998 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:42:20,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:42:33,725 INFO L129 PetriNetUnfolder]: 3998/12830 cut-off events. [2021-12-06 22:42:33,726 INFO L130 PetriNetUnfolder]: For 2015468/2015468 co-relation queries the response was YES. [2021-12-06 22:42:33,968 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162419 conditions, 12830 events. 3998/12830 cut-off events. For 2015468/2015468 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 148222 event pairs, 253 based on Foata normal form. 1/12787 useless extension candidates. Maximal degree in co-relation 162184. Up to 5535 conditions per place. [2021-12-06 22:42:34,072 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2385 selfloop transitions, 681 changer transitions 6/3117 dead transitions. [2021-12-06 22:42:34,072 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 800 places, 3117 transitions, 99794 flow [2021-12-06 22:42:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 22:42:34,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 22:42:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1101 transitions. [2021-12-06 22:42:34,073 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7459349593495935 [2021-12-06 22:42:34,074 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1101 transitions. [2021-12-06 22:42:34,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1101 transitions. [2021-12-06 22:42:34,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:42:34,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1101 transitions. [2021-12-06 22:42:34,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.166666666666664) internal successors, (1101), 18 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:42:34,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:42:34,076 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:42:34,076 INFO L186 Difference]: Start difference. First operand has 787 places, 3080 transitions, 92854 flow. Second operand 18 states and 1101 transitions. [2021-12-06 22:42:34,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 800 places, 3117 transitions, 99794 flow [2021-12-06 22:42:57,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 783 places, 3117 transitions, 98197 flow, removed 657 selfloop flow, removed 17 redundant places. [2021-12-06 22:42:58,044 INFO L242 Difference]: Finished difference. Result has 787 places, 3086 transitions, 93053 flow [2021-12-06 22:42:58,047 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=91403, PETRI_DIFFERENCE_MINUEND_PLACES=766, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3080, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=676, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=93053, PETRI_PLACES=787, PETRI_TRANSITIONS=3086} [2021-12-06 22:42:58,047 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 715 predicate places. [2021-12-06 22:42:58,047 INFO L470 AbstractCegarLoop]: Abstraction has has 787 places, 3086 transitions, 93053 flow [2021-12-06 22:42:58,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:42:58,047 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:42:58,047 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:42:58,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-06 22:42:58,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:42:58,248 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:42:58,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:42:58,249 INFO L85 PathProgramCache]: Analyzing trace with hash -502034307, now seen corresponding path program 22 times [2021-12-06 22:42:58,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:42:58,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873889462] [2021-12-06 22:42:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:42:58,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:42:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:42:58,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:42:58,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873889462] [2021-12-06 22:42:58,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873889462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:42:58,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695877681] [2021-12-06 22:42:58,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:42:58,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:42:58,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:42:58,336 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:42:58,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 22:42:58,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:42:58,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:42:58,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:42:58,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:42:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:42:58,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:42:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:42:58,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695877681] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:42:58,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:42:58,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2021-12-06 22:42:58,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057901897] [2021-12-06 22:42:58,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:42:58,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 22:42:58,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:42:58,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 22:42:58,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:42:58,618 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:42:58,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 3086 transitions, 93053 flow. Second operand has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:42:58,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:42:58,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:42:58,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:43:12,068 INFO L129 PetriNetUnfolder]: 4159/13362 cut-off events. [2021-12-06 22:43:12,068 INFO L130 PetriNetUnfolder]: For 1192666/1192666 co-relation queries the response was YES. [2021-12-06 22:43:12,310 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152315 conditions, 13362 events. 4159/13362 cut-off events. For 1192666/1192666 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 155414 event pairs, 278 based on Foata normal form. 71/13403 useless extension candidates. Maximal degree in co-relation 152080. Up to 5126 conditions per place. [2021-12-06 22:43:12,422 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1445 selfloop transitions, 1892 changer transitions 12/3394 dead transitions. [2021-12-06 22:43:12,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 3394 transitions, 107162 flow [2021-12-06 22:43:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 22:43:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-06 22:43:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2098 transitions. [2021-12-06 22:43:12,424 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7525107604017217 [2021-12-06 22:43:12,424 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2098 transitions. [2021-12-06 22:43:12,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2098 transitions. [2021-12-06 22:43:12,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:43:12,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2098 transitions. [2021-12-06 22:43:12,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 61.705882352941174) internal successors, (2098), 34 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:43:12,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 82.0) internal successors, (2870), 35 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:43:12,428 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 82.0) internal successors, (2870), 35 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:43:12,428 INFO L186 Difference]: Start difference. First operand has 787 places, 3086 transitions, 93053 flow. Second operand 34 states and 2098 transitions. [2021-12-06 22:43:12,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 816 places, 3394 transitions, 107162 flow [2021-12-06 22:43:28,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 807 places, 3394 transitions, 106673 flow, removed 73 selfloop flow, removed 9 redundant places. [2021-12-06 22:43:28,538 INFO L242 Difference]: Finished difference. Result has 818 places, 3236 transitions, 104297 flow [2021-12-06 22:43:28,540 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=92353, PETRI_DIFFERENCE_MINUEND_PLACES=774, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3078, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1741, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=104297, PETRI_PLACES=818, PETRI_TRANSITIONS=3236} [2021-12-06 22:43:28,541 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 746 predicate places. [2021-12-06 22:43:28,541 INFO L470 AbstractCegarLoop]: Abstraction has has 818 places, 3236 transitions, 104297 flow [2021-12-06 22:43:28,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:43:28,541 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:43:28,541 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:28,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 22:43:28,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:28,742 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:43:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:28,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1913279147, now seen corresponding path program 23 times [2021-12-06 22:43:28,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:28,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409125137] [2021-12-06 22:43:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:28,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:43:28,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:28,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409125137] [2021-12-06 22:43:28,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409125137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:28,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130008465] [2021-12-06 22:43:28,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:43:28,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:28,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:28,815 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:28,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 22:43:28,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:43:28,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:43:28,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:43:28,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:43:28,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:43:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:43:29,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130008465] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:43:29,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:43:29,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-12-06 22:43:29,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667581424] [2021-12-06 22:43:29,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:43:29,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 22:43:29,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:29,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 22:43:29,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:43:29,078 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:43:29,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 818 places, 3236 transitions, 104297 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:43:29,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:43:29,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:43:29,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:43:44,838 INFO L129 PetriNetUnfolder]: 4468/14446 cut-off events. [2021-12-06 22:43:44,838 INFO L130 PetriNetUnfolder]: For 1430698/1430698 co-relation queries the response was YES. [2021-12-06 22:43:45,158 INFO L84 FinitePrefix]: Finished finitePrefix Result has 175489 conditions, 14446 events. 4468/14446 cut-off events. For 1430698/1430698 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 170551 event pairs, 265 based on Foata normal form. 15/14406 useless extension candidates. Maximal degree in co-relation 175245. Up to 5304 conditions per place. [2021-12-06 22:43:45,269 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2536 selfloop transitions, 1069 changer transitions 16/3666 dead transitions. [2021-12-06 22:43:45,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 858 places, 3666 transitions, 123339 flow [2021-12-06 22:43:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 22:43:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-06 22:43:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2517 transitions. [2021-12-06 22:43:45,271 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7486615110053539 [2021-12-06 22:43:45,271 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2517 transitions. [2021-12-06 22:43:45,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2517 transitions. [2021-12-06 22:43:45,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:43:45,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2517 transitions. [2021-12-06 22:43:45,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.390243902439025) internal successors, (2517), 41 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:43:45,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:43:45,276 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:43:45,276 INFO L186 Difference]: Start difference. First operand has 818 places, 3236 transitions, 104297 flow. Second operand 41 states and 2517 transitions. [2021-12-06 22:43:45,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 858 places, 3666 transitions, 123339 flow [2021-12-06 22:44:06,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 843 places, 3666 transitions, 122771 flow, removed 144 selfloop flow, removed 15 redundant places. [2021-12-06 22:44:06,888 INFO L242 Difference]: Finished difference. Result has 860 places, 3435 transitions, 114351 flow [2021-12-06 22:44:06,890 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=103807, PETRI_DIFFERENCE_MINUEND_PLACES=803, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=915, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=114351, PETRI_PLACES=860, PETRI_TRANSITIONS=3435} [2021-12-06 22:44:06,891 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 788 predicate places. [2021-12-06 22:44:06,891 INFO L470 AbstractCegarLoop]: Abstraction has has 860 places, 3435 transitions, 114351 flow [2021-12-06 22:44:06,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:44:06,891 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:44:06,891 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:44:06,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 22:44:07,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 22:44:07,092 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:44:07,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:44:07,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1395816219, now seen corresponding path program 24 times [2021-12-06 22:44:07,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:44:07,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861432533] [2021-12-06 22:44:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:44:07,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:44:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:44:07,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:44:07,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861432533] [2021-12-06 22:44:07,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861432533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:44:07,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884474148] [2021-12-06 22:44:07,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:44:07,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:44:07,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:44:07,160 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:44:07,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 22:44:07,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-06 22:44:07,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:44:07,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:44:07,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:44:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:44:07,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:44:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:44:07,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884474148] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:44:07,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:44:07,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2021-12-06 22:44:07,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166683557] [2021-12-06 22:44:07,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:44:07,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 22:44:07,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:44:07,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 22:44:07,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:44:07,404 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:44:07,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 860 places, 3435 transitions, 114351 flow. Second operand has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:44:07,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:44:07,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:44:07,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:44:26,219 INFO L129 PetriNetUnfolder]: 4719/15278 cut-off events. [2021-12-06 22:44:26,220 INFO L130 PetriNetUnfolder]: For 1719425/1719425 co-relation queries the response was YES. [2021-12-06 22:44:26,543 INFO L84 FinitePrefix]: Finished finitePrefix Result has 191768 conditions, 15278 events. 4719/15278 cut-off events. For 1719425/1719425 co-relation queries the response was YES. Maximal size of possible extension queue 998. Compared 181793 event pairs, 246 based on Foata normal form. 86/15338 useless extension candidates. Maximal degree in co-relation 191508. Up to 4740 conditions per place. [2021-12-06 22:44:26,659 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1539 selfloop transitions, 2215 changer transitions 5/3804 dead transitions. [2021-12-06 22:44:26,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 887 places, 3804 transitions, 132317 flow [2021-12-06 22:44:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 22:44:26,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-06 22:44:26,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2222 transitions. [2021-12-06 22:44:26,662 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.752710027100271 [2021-12-06 22:44:26,662 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2222 transitions. [2021-12-06 22:44:26,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2222 transitions. [2021-12-06 22:44:26,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:44:26,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2222 transitions. [2021-12-06 22:44:26,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 61.72222222222222) internal successors, (2222), 36 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:44:26,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 82.0) internal successors, (3034), 37 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:44:26,666 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 82.0) internal successors, (3034), 37 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:44:26,666 INFO L186 Difference]: Start difference. First operand has 860 places, 3435 transitions, 114351 flow. Second operand 36 states and 2222 transitions. [2021-12-06 22:44:26,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 887 places, 3804 transitions, 132317 flow [2021-12-06 22:44:51,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 858 places, 3804 transitions, 130385 flow, removed 738 selfloop flow, removed 29 redundant places. [2021-12-06 22:44:52,009 INFO L242 Difference]: Finished difference. Result has 871 places, 3631 transitions, 127979 flow [2021-12-06 22:44:52,012 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=111921, PETRI_DIFFERENCE_MINUEND_PLACES=823, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2018, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=127979, PETRI_PLACES=871, PETRI_TRANSITIONS=3631} [2021-12-06 22:44:52,012 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 799 predicate places. [2021-12-06 22:44:52,012 INFO L470 AbstractCegarLoop]: Abstraction has has 871 places, 3631 transitions, 127979 flow [2021-12-06 22:44:52,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:44:52,012 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:44:52,013 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:44:52,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 22:44:52,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 22:44:52,214 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:44:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:44:52,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1390055709, now seen corresponding path program 25 times [2021-12-06 22:44:52,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:44:52,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802365823] [2021-12-06 22:44:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:44:52,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:44:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:44:52,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:44:52,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802365823] [2021-12-06 22:44:52,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802365823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:44:52,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304757284] [2021-12-06 22:44:52,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:44:52,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:44:52,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:44:52,289 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:44:52,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 22:44:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:52,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 22:44:52,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:44:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:44:52,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:44:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:44:52,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304757284] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:44:52,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:44:52,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2021-12-06 22:44:52,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132172081] [2021-12-06 22:44:52,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:44:52,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 22:44:52,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:44:52,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 22:44:52,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:44:52,696 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2021-12-06 22:44:52,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 871 places, 3631 transitions, 127979 flow. Second operand has 11 states, 11 states have (on average 62.63636363636363) internal successors, (689), 11 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:44:52,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:44:52,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2021-12-06 22:44:52,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:45:15,530 INFO L129 PetriNetUnfolder]: 6843/24719 cut-off events. [2021-12-06 22:45:15,530 INFO L130 PetriNetUnfolder]: For 2284069/2284480 co-relation queries the response was YES. [2021-12-06 22:45:16,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 295497 conditions, 24719 events. 6843/24719 cut-off events. For 2284069/2284480 co-relation queries the response was YES. Maximal size of possible extension queue 1280. Compared 325296 event pairs, 295 based on Foata normal form. 71/24685 useless extension candidates. Maximal degree in co-relation 295234. Up to 3751 conditions per place. [2021-12-06 22:45:16,410 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 1286 selfloop transitions, 1141 changer transitions 229/4832 dead transitions. [2021-12-06 22:45:16,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 877 places, 4832 transitions, 185621 flow [2021-12-06 22:45:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:45:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 22:45:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 462 transitions. [2021-12-06 22:45:16,411 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2021-12-06 22:45:16,411 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 462 transitions. [2021-12-06 22:45:16,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 462 transitions. [2021-12-06 22:45:16,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:45:16,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 462 transitions. [2021-12-06 22:45:16,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:45:16,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:45:16,412 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:45:16,412 INFO L186 Difference]: Start difference. First operand has 871 places, 3631 transitions, 127979 flow. Second operand 7 states and 462 transitions. [2021-12-06 22:45:16,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 877 places, 4832 transitions, 185621 flow [2021-12-06 22:46:03,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 858 places, 4832 transitions, 184540 flow, removed 269 selfloop flow, removed 19 redundant places. [2021-12-06 22:46:03,503 INFO L242 Difference]: Finished difference. Result has 863 places, 4498 transitions, 169639 flow [2021-12-06 22:46:03,506 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=127125, PETRI_DIFFERENCE_MINUEND_PLACES=852, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=169639, PETRI_PLACES=863, PETRI_TRANSITIONS=4498} [2021-12-06 22:46:03,506 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 791 predicate places. [2021-12-06 22:46:03,506 INFO L470 AbstractCegarLoop]: Abstraction has has 863 places, 4498 transitions, 169639 flow [2021-12-06 22:46:03,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 62.63636363636363) internal successors, (689), 11 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:03,506 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:46:03,507 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:03,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-06 22:46:03,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 22:46:03,707 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:46:03,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:03,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1047844775, now seen corresponding path program 26 times [2021-12-06 22:46:03,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:03,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592575320] [2021-12-06 22:46:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:03,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:03,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:03,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592575320] [2021-12-06 22:46:03,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592575320] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:03,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655659837] [2021-12-06 22:46:03,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:46:03,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:03,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:03,781 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:03,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 22:46:03,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:46:03,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:03,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 22:46:03,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:03,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:04,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655659837] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:04,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:04,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2021-12-06 22:46:04,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727577124] [2021-12-06 22:46:04,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:04,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 22:46:04,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 22:46:04,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-12-06 22:46:04,255 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:46:04,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 863 places, 4498 transitions, 169639 flow. Second operand has 25 states, 25 states have (on average 59.24) internal successors, (1481), 25 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:04,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:46:04,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:46:04,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:46:51,327 INFO L129 PetriNetUnfolder]: 8138/26510 cut-off events. [2021-12-06 22:46:51,327 INFO L130 PetriNetUnfolder]: For 2879951/2879951 co-relation queries the response was YES. [2021-12-06 22:46:52,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 346054 conditions, 26510 events. 8138/26510 cut-off events. For 2879951/2879951 co-relation queries the response was YES. Maximal size of possible extension queue 1547. Compared 342592 event pairs, 251 based on Foata normal form. 268/26713 useless extension candidates. Maximal degree in co-relation 345787. Up to 4432 conditions per place. [2021-12-06 22:46:52,494 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 841 selfloop transitions, 5160 changer transitions 305/6351 dead transitions. [2021-12-06 22:46:52,494 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 928 places, 6351 transitions, 244301 flow [2021-12-06 22:46:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-06 22:46:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-12-06 22:46:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4173 transitions. [2021-12-06 22:46:52,497 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7483859397417504 [2021-12-06 22:46:52,497 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4173 transitions. [2021-12-06 22:46:52,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4173 transitions. [2021-12-06 22:46:52,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:46:52,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4173 transitions. [2021-12-06 22:46:52,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 61.36764705882353) internal successors, (4173), 68 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:52,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 82.0) internal successors, (5658), 69 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:52,674 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 82.0) internal successors, (5658), 69 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:52,674 INFO L186 Difference]: Start difference. First operand has 863 places, 4498 transitions, 169639 flow. Second operand 68 states and 4173 transitions. [2021-12-06 22:46:52,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 928 places, 6351 transitions, 244301 flow [2021-12-06 22:47:49,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 925 places, 6351 transitions, 243411 flow, removed 309 selfloop flow, removed 3 redundant places. [2021-12-06 22:47:50,124 INFO L242 Difference]: Finished difference. Result has 968 places, 5828 transitions, 228649 flow [2021-12-06 22:47:50,128 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=168914, PETRI_DIFFERENCE_MINUEND_PLACES=858, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3918, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=228649, PETRI_PLACES=968, PETRI_TRANSITIONS=5828} [2021-12-06 22:47:50,128 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 896 predicate places. [2021-12-06 22:47:50,128 INFO L470 AbstractCegarLoop]: Abstraction has has 968 places, 5828 transitions, 228649 flow [2021-12-06 22:47:50,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.24) internal successors, (1481), 25 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:50,128 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:47:50,129 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:47:50,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 22:47:50,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:50,329 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:47:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:47:50,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1323375271, now seen corresponding path program 27 times [2021-12-06 22:47:50,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:47:50,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315809248] [2021-12-06 22:47:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:47:50,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:47:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:47:50,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:47:50,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315809248] [2021-12-06 22:47:50,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315809248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:50,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250838142] [2021-12-06 22:47:50,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:47:50,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:50,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:47:50,418 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:47:50,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 22:47:50,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 22:47:50,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:47:50,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 22:47:50,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:47:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:47:50,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:47:50,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250838142] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:47:50,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:47:50,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 12] total 27 [2021-12-06 22:47:50,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344214772] [2021-12-06 22:47:50,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:50,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 22:47:50,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:50,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 22:47:50,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-12-06 22:47:50,762 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:47:50,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 968 places, 5828 transitions, 228649 flow. Second operand has 27 states, 27 states have (on average 59.44444444444444) internal successors, (1605), 27 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:50,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:47:50,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:47:50,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:49:07,070 INFO L129 PetriNetUnfolder]: 9873/33991 cut-off events. [2021-12-06 22:49:07,070 INFO L130 PetriNetUnfolder]: For 5576676/5576676 co-relation queries the response was YES. [2021-12-06 22:49:08,562 INFO L84 FinitePrefix]: Finished finitePrefix Result has 486074 conditions, 33991 events. 9873/33991 cut-off events. For 5576676/5576676 co-relation queries the response was YES. Maximal size of possible extension queue 1842. Compared 463410 event pairs, 83 based on Foata normal form. 78/34026 useless extension candidates. Maximal degree in co-relation 485766. Up to 5022 conditions per place. [2021-12-06 22:49:08,855 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 2309 selfloop transitions, 7301 changer transitions 423/10078 dead transitions. [2021-12-06 22:49:08,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1057 places, 10078 transitions, 407867 flow [2021-12-06 22:49:08,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-06 22:49:08,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-12-06 22:49:08,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 5520 transitions. [2021-12-06 22:49:08,858 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7479674796747967 [2021-12-06 22:49:08,858 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 5520 transitions. [2021-12-06 22:49:08,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 5520 transitions. [2021-12-06 22:49:08,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:49:08,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 5520 transitions. [2021-12-06 22:49:08,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 61.333333333333336) internal successors, (5520), 90 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:49:08,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 82.0) internal successors, (7462), 91 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:49:08,867 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 82.0) internal successors, (7462), 91 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:49:08,867 INFO L186 Difference]: Start difference. First operand has 968 places, 5828 transitions, 228649 flow. Second operand 90 states and 5520 transitions. [2021-12-06 22:49:08,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1057 places, 10078 transitions, 407867 flow [2021-12-06 22:51:01,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1041 places, 10078 transitions, 403131 flow, removed 1766 selfloop flow, removed 16 redundant places. [2021-12-06 22:51:02,087 INFO L242 Difference]: Finished difference. Result has 1071 places, 8491 transitions, 349748 flow [2021-12-06 22:51:02,091 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=225449, PETRI_DIFFERENCE_MINUEND_PLACES=952, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4713, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=932, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=349748, PETRI_PLACES=1071, PETRI_TRANSITIONS=8491} [2021-12-06 22:51:02,091 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 999 predicate places. [2021-12-06 22:51:02,092 INFO L470 AbstractCegarLoop]: Abstraction has has 1071 places, 8491 transitions, 349748 flow [2021-12-06 22:51:02,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 59.44444444444444) internal successors, (1605), 27 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:51:02,092 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:51:02,092 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:51:02,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 22:51:02,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-06 22:51:02,292 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:51:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:51:02,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1890211049, now seen corresponding path program 28 times [2021-12-06 22:51:02,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:51:02,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404839319] [2021-12-06 22:51:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:51:02,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:51:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:51:02,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:51:02,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404839319] [2021-12-06 22:51:02,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404839319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:51:02,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679575355] [2021-12-06 22:51:02,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:51:02,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:51:02,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:51:02,399 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:51:02,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319cc382-889f-4ead-a495-8aa4119f5bf0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 22:51:02,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:51:02,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:51:02,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 22:51:02,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:51:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:51:02,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:51:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:51:02,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679575355] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:51:02,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:51:02,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 12] total 33 [2021-12-06 22:51:02,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561117243] [2021-12-06 22:51:02,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:51:02,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 22:51:02,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:51:02,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 22:51:02,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 22:51:02,861 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2021-12-06 22:51:02,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1071 places, 8491 transitions, 349748 flow. Second operand has 33 states, 33 states have (on average 59.515151515151516) internal successors, (1964), 33 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:51:02,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:51:02,862 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2021-12-06 22:51:02,862 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand