./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/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_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/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_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:56:08,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:56:08,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:56:08,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:56:08,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:56:08,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:56:08,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:56:08,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:56:08,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:56:08,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:56:08,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:56:08,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:56:08,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:56:08,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:56:08,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:56:08,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:56:08,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:56:08,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:56:08,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:56:08,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:56:08,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:56:08,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:56:08,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:56:08,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:56:08,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:56:08,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:56:08,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:56:08,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:56:08,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:56:08,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:56:08,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:56:08,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:56:08,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:56:08,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:56:08,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:56:08,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:56:08,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:56:08,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:56:08,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:56:08,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:56:08,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:56:08,717 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:56:08,739 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:56:08,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:56:08,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:56:08,740 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:56:08,741 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:56:08,741 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:56:08,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:56:08,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:56:08,741 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:56:08,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:56:08,742 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:56:08,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:56:08,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:56:08,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:56:08,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:56:08,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:56:08,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:56:08,743 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:56:08,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:56:08,743 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:56:08,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:56:08,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:56:08,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:56:08,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:56:08,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:56:08,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:56:08,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:56:08,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:56:08,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:56:08,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:56:08,752 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:56:08,752 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:56:08,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:56:08,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:56:08,752 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_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2021-12-06 19:56:08,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:56:08,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:56:08,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:56:08,946 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:56:08,946 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:56:08,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2021-12-06 19:56:08,988 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/data/c18fe3d31/543ac043c76b4bf897c770991e7983ee/FLAGcd06b670d [2021-12-06 19:56:09,343 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:56:09,343 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2021-12-06 19:56:09,348 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/data/c18fe3d31/543ac043c76b4bf897c770991e7983ee/FLAGcd06b670d [2021-12-06 19:56:09,358 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/data/c18fe3d31/543ac043c76b4bf897c770991e7983ee [2021-12-06 19:56:09,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:56:09,360 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:56:09,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:56:09,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:56:09,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:56:09,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:56:09" (1/1) ... [2021-12-06 19:56:09,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a4d207c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:56:09, skipping insertion in model container [2021-12-06 19:56:09,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:56:09" (1/1) ... [2021-12-06 19:56:09,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:56:09,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:56:09,493 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_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2021-12-06 19:56:09,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:56:09,501 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:56:09,514 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_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2021-12-06 19:56:09,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:56:09,525 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:56:09,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:56:09 WrapperNode [2021-12-06 19:56:09,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:56:09,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:56:09,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:56:09,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:56:09,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:56:09" (1/1) ... [2021-12-06 19:56:09,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:56:09" (1/1) ... [2021-12-06 19:56:09,558 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2021-12-06 19:56:09,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:56:09,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:56:09,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:56:09,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:56:09,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:56:09" (1/1) ... [2021-12-06 19:56:09,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:56:09" (1/1) ... [2021-12-06 19:56:09,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:56:09" (1/1) ... [2021-12-06 19:56:09,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:56:09" (1/1) ... [2021-12-06 19:56:09,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:56:09" (1/1) ... [2021-12-06 19:56:09,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:56:09" (1/1) ... [2021-12-06 19:56:09,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:56:09" (1/1) ... [2021-12-06 19:56:09,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:56:09,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:56:09,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:56:09,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:56:09,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:56:09" (1/1) ... [2021-12-06 19:56:09,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:56:09,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:09,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:56:09,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:56:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:56:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-06 19:56:09,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-06 19:56:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-06 19:56:09,647 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-06 19:56:09,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:56:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:56:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 19:56:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-06 19:56:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-06 19:56:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:56:09,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:56:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 19:56:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:56:09,653 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 19:56:09,712 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:56:09,713 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:56:09,834 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:56:09,872 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:56:09,872 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 19:56:09,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:56:09 BoogieIcfgContainer [2021-12-06 19:56:09,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:56:09,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:56:09,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:56:09,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:56:09,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:56:09" (1/3) ... [2021-12-06 19:56:09,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a012f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:56:09, skipping insertion in model container [2021-12-06 19:56:09,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:56:09" (2/3) ... [2021-12-06 19:56:09,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a012f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:56:09, skipping insertion in model container [2021-12-06 19:56:09,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:56:09" (3/3) ... [2021-12-06 19:56:09,880 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2021-12-06 19:56:09,884 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 19:56:09,884 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:56:09,884 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:56:09,884 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 19:56:09,907 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,907 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,907 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,908 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,908 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,908 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,909 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,909 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,909 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,909 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,910 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,910 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,910 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,910 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,910 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,910 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,911 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,911 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,911 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,911 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,914 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,914 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,914 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,914 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,914 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,916 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,916 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,916 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,916 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,916 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,923 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,923 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,923 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,923 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:56:09,927 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-06 19:56:09,963 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:56:09,968 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 19:56:09,968 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-06 19:56:09,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2021-12-06 19:56:10,008 INFO L129 PetriNetUnfolder]: 5/75 cut-off events. [2021-12-06 19:56:10,008 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 19:56:10,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2021-12-06 19:56:10,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2021-12-06 19:56:10,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 144 flow [2021-12-06 19:56:10,028 INFO L129 PetriNetUnfolder]: 5/65 cut-off events. [2021-12-06 19:56:10,028 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 19:56:10,028 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:10,029 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:10,029 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:10,033 INFO L85 PathProgramCache]: Analyzing trace with hash 751055543, now seen corresponding path program 1 times [2021-12-06 19:56:10,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:10,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157599166] [2021-12-06 19:56:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:10,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:10,273 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 19:56:10,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:10,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157599166] [2021-12-06 19:56:10,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157599166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:56:10,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:56:10,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:56:10,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667370588] [2021-12-06 19:56:10,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:56:10,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:56:10,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:10,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:56:10,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:56:10,306 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2021-12-06 19:56:10,309 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:10,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:10,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2021-12-06 19:56:10,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:10,382 INFO L129 PetriNetUnfolder]: 8/105 cut-off events. [2021-12-06 19:56:10,382 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2021-12-06 19:56:10,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 105 events. 8/105 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 180 event pairs, 1 based on Foata normal form. 16/112 useless extension candidates. Maximal degree in co-relation 61. Up to 19 conditions per place. [2021-12-06 19:56:10,385 INFO L132 encePairwiseOnDemand]: 67/77 looper letters, 11 selfloop transitions, 2 changer transitions 7/71 dead transitions. [2021-12-06 19:56:10,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 203 flow [2021-12-06 19:56:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:56:10,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 19:56:10,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 394 transitions. [2021-12-06 19:56:10,397 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8528138528138528 [2021-12-06 19:56:10,398 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 394 transitions. [2021-12-06 19:56:10,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 394 transitions. [2021-12-06 19:56:10,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:10,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 394 transitions. [2021-12-06 19:56:10,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:10,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:10,409 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:10,411 INFO L186 Difference]: Start difference. First operand has 68 places, 66 transitions, 144 flow. Second operand 6 states and 394 transitions. [2021-12-06 19:56:10,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 203 flow [2021-12-06 19:56:10,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 189 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-06 19:56:10,417 INFO L242 Difference]: Finished difference. Result has 72 places, 63 transitions, 146 flow [2021-12-06 19:56:10,419 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2021-12-06 19:56:10,423 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2021-12-06 19:56:10,424 INFO L470 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 146 flow [2021-12-06 19:56:10,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:10,424 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:10,424 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:10,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:56:10,425 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:10,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:10,425 INFO L85 PathProgramCache]: Analyzing trace with hash 600101581, now seen corresponding path program 1 times [2021-12-06 19:56:10,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:10,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094570192] [2021-12-06 19:56:10,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:10,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:10,509 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 19:56:10,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:10,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094570192] [2021-12-06 19:56:10,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094570192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:56:10,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:56:10,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:56:10,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095017969] [2021-12-06 19:56:10,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:56:10,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:56:10,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:10,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:56:10,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:56:10,514 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2021-12-06 19:56:10,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:10,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:10,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2021-12-06 19:56:10,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:10,610 INFO L129 PetriNetUnfolder]: 90/304 cut-off events. [2021-12-06 19:56:10,610 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-12-06 19:56:10,611 INFO L84 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 304 events. 90/304 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1346 event pairs, 32 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 541. Up to 99 conditions per place. [2021-12-06 19:56:10,613 INFO L132 encePairwiseOnDemand]: 70/77 looper letters, 35 selfloop transitions, 5 changer transitions 4/88 dead transitions. [2021-12-06 19:56:10,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 301 flow [2021-12-06 19:56:10,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:56:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 19:56:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 372 transitions. [2021-12-06 19:56:10,616 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8051948051948052 [2021-12-06 19:56:10,616 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 372 transitions. [2021-12-06 19:56:10,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 372 transitions. [2021-12-06 19:56:10,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:10,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 372 transitions. [2021-12-06 19:56:10,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:10,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:10,620 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:10,620 INFO L186 Difference]: Start difference. First operand has 72 places, 63 transitions, 146 flow. Second operand 6 states and 372 transitions. [2021-12-06 19:56:10,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 301 flow [2021-12-06 19:56:10,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 88 transitions, 293 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-06 19:56:10,623 INFO L242 Difference]: Finished difference. Result has 73 places, 65 transitions, 166 flow [2021-12-06 19:56:10,623 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2021-12-06 19:56:10,623 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2021-12-06 19:56:10,624 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 166 flow [2021-12-06 19:56:10,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:10,624 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:10,624 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:10,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:56:10,625 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:10,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:10,625 INFO L85 PathProgramCache]: Analyzing trace with hash 651339935, now seen corresponding path program 2 times [2021-12-06 19:56:10,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:10,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240241048] [2021-12-06 19:56:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:10,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:10,688 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 19:56:10,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:10,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240241048] [2021-12-06 19:56:10,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240241048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:56:10,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475154831] [2021-12-06 19:56:10,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:56:10,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:10,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:10,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:56:10,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:56:10,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:56:10,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:56:10,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:56:10,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:10,870 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 19:56:10,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:56:10,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475154831] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:10,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:56:10,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2021-12-06 19:56:10,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036451834] [2021-12-06 19:56:10,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:10,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:56:10,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:10,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:56:10,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:56:10,939 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2021-12-06 19:56:10,939 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 166 flow. Second operand has 9 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:10,939 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:10,940 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2021-12-06 19:56:10,940 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:11,101 INFO L129 PetriNetUnfolder]: 147/407 cut-off events. [2021-12-06 19:56:11,101 INFO L130 PetriNetUnfolder]: For 129/137 co-relation queries the response was YES. [2021-12-06 19:56:11,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 407 events. 147/407 cut-off events. For 129/137 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1890 event pairs, 12 based on Foata normal form. 11/413 useless extension candidates. Maximal degree in co-relation 727. Up to 54 conditions per place. [2021-12-06 19:56:11,107 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 54 selfloop transitions, 27 changer transitions 6/131 dead transitions. [2021-12-06 19:56:11,107 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 131 transitions, 560 flow [2021-12-06 19:56:11,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:56:11,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 19:56:11,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 854 transitions. [2021-12-06 19:56:11,111 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7922077922077922 [2021-12-06 19:56:11,111 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 854 transitions. [2021-12-06 19:56:11,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 854 transitions. [2021-12-06 19:56:11,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:11,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 854 transitions. [2021-12-06 19:56:11,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 61.0) internal successors, (854), 14 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:11,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:11,118 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:11,118 INFO L186 Difference]: Start difference. First operand has 73 places, 65 transitions, 166 flow. Second operand 14 states and 854 transitions. [2021-12-06 19:56:11,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 131 transitions, 560 flow [2021-12-06 19:56:11,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 131 transitions, 535 flow, removed 5 selfloop flow, removed 3 redundant places. [2021-12-06 19:56:11,123 INFO L242 Difference]: Finished difference. Result has 89 places, 91 transitions, 342 flow [2021-12-06 19:56:11,124 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=342, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2021-12-06 19:56:11,124 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 21 predicate places. [2021-12-06 19:56:11,125 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 342 flow [2021-12-06 19:56:11,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:11,125 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:11,125 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:11,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:56:11,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-06 19:56:11,327 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:11,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1948148621, now seen corresponding path program 3 times [2021-12-06 19:56:11,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:11,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499093386] [2021-12-06 19:56:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:11,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:11,495 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 19:56:11,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:11,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499093386] [2021-12-06 19:56:11,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499093386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:56:11,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:56:11,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:56:11,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975529766] [2021-12-06 19:56:11,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:56:11,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:56:11,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:11,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:56:11,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:56:11,500 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2021-12-06 19:56:11,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 342 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:11,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:11,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2021-12-06 19:56:11,501 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:11,598 INFO L129 PetriNetUnfolder]: 153/421 cut-off events. [2021-12-06 19:56:11,598 INFO L130 PetriNetUnfolder]: For 550/552 co-relation queries the response was YES. [2021-12-06 19:56:11,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 421 events. 153/421 cut-off events. For 550/552 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1942 event pairs, 64 based on Foata normal form. 3/417 useless extension candidates. Maximal degree in co-relation 944. Up to 221 conditions per place. [2021-12-06 19:56:11,603 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 55 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2021-12-06 19:56:11,603 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 112 transitions, 582 flow [2021-12-06 19:56:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:56:11,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 19:56:11,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 317 transitions. [2021-12-06 19:56:11,605 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8233766233766234 [2021-12-06 19:56:11,605 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 317 transitions. [2021-12-06 19:56:11,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 317 transitions. [2021-12-06 19:56:11,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:11,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 317 transitions. [2021-12-06 19:56:11,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:11,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:11,607 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:11,607 INFO L186 Difference]: Start difference. First operand has 89 places, 91 transitions, 342 flow. Second operand 5 states and 317 transitions. [2021-12-06 19:56:11,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 112 transitions, 582 flow [2021-12-06 19:56:11,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 112 transitions, 578 flow, removed 2 selfloop flow, removed 0 redundant places. [2021-12-06 19:56:11,613 INFO L242 Difference]: Finished difference. Result has 95 places, 96 transitions, 415 flow [2021-12-06 19:56:11,613 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=415, PETRI_PLACES=95, PETRI_TRANSITIONS=96} [2021-12-06 19:56:11,614 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 27 predicate places. [2021-12-06 19:56:11,614 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 96 transitions, 415 flow [2021-12-06 19:56:11,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:11,614 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:11,614 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:11,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:56:11,614 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:11,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:11,615 INFO L85 PathProgramCache]: Analyzing trace with hash -497140103, now seen corresponding path program 4 times [2021-12-06 19:56:11,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:11,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734599585] [2021-12-06 19:56:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:11,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:11,670 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 19:56:11,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:11,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734599585] [2021-12-06 19:56:11,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734599585] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:56:11,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787412853] [2021-12-06 19:56:11,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:56:11,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:11,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:11,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:56:11,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:56:11,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:56:11,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:56:11,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:56:11,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:11,807 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 19:56:11,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:11,865 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 19:56:11,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787412853] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:11,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:56:11,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-06 19:56:11,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648666403] [2021-12-06 19:56:11,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:11,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 19:56:11,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:11,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 19:56:11,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:56:11,869 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2021-12-06 19:56:11,870 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 96 transitions, 415 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:11,870 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:11,870 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2021-12-06 19:56:11,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:12,022 INFO L129 PetriNetUnfolder]: 165/506 cut-off events. [2021-12-06 19:56:12,022 INFO L130 PetriNetUnfolder]: For 900/902 co-relation queries the response was YES. [2021-12-06 19:56:12,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 506 events. 165/506 cut-off events. For 900/902 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2591 event pairs, 36 based on Foata normal form. 9/508 useless extension candidates. Maximal degree in co-relation 1102. Up to 114 conditions per place. [2021-12-06 19:56:12,028 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 66 selfloop transitions, 39 changer transitions 0/149 dead transitions. [2021-12-06 19:56:12,028 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 149 transitions, 883 flow [2021-12-06 19:56:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:56:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-06 19:56:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 564 transitions. [2021-12-06 19:56:12,030 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8138528138528138 [2021-12-06 19:56:12,030 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 564 transitions. [2021-12-06 19:56:12,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 564 transitions. [2021-12-06 19:56:12,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:12,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 564 transitions. [2021-12-06 19:56:12,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.666666666666664) internal successors, (564), 9 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:12,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:12,035 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:12,035 INFO L186 Difference]: Start difference. First operand has 95 places, 96 transitions, 415 flow. Second operand 9 states and 564 transitions. [2021-12-06 19:56:12,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 149 transitions, 883 flow [2021-12-06 19:56:12,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 149 transitions, 867 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-06 19:56:12,042 INFO L242 Difference]: Finished difference. Result has 107 places, 113 transitions, 648 flow [2021-12-06 19:56:12,042 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=648, PETRI_PLACES=107, PETRI_TRANSITIONS=113} [2021-12-06 19:56:12,043 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 39 predicate places. [2021-12-06 19:56:12,043 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 113 transitions, 648 flow [2021-12-06 19:56:12,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:12,043 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:12,044 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:12,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:56:12,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:12,245 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:12,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1146310219, now seen corresponding path program 5 times [2021-12-06 19:56:12,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:12,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552442006] [2021-12-06 19:56:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:12,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:12,409 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 19:56:12,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:12,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552442006] [2021-12-06 19:56:12,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552442006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:56:12,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889061506] [2021-12-06 19:56:12,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:56:12,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:12,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:12,411 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:56:12,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:56:12,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:56:12,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:56:12,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:56:12,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:12,543 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 19:56:12,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:12,602 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 19:56:12,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889061506] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:12,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:56:12,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-06 19:56:12,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411076793] [2021-12-06 19:56:12,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:12,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 19:56:12,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:12,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 19:56:12,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:56:12,605 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2021-12-06 19:56:12,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 113 transitions, 648 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:12,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:12,606 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2021-12-06 19:56:12,606 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:12,779 INFO L129 PetriNetUnfolder]: 200/610 cut-off events. [2021-12-06 19:56:12,779 INFO L130 PetriNetUnfolder]: For 1371/1373 co-relation queries the response was YES. [2021-12-06 19:56:12,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1847 conditions, 610 events. 200/610 cut-off events. For 1371/1373 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3446 event pairs, 16 based on Foata normal form. 11/615 useless extension candidates. Maximal degree in co-relation 1509. Up to 106 conditions per place. [2021-12-06 19:56:12,785 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 64 selfloop transitions, 52 changer transitions 2/162 dead transitions. [2021-12-06 19:56:12,785 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 162 transitions, 1131 flow [2021-12-06 19:56:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 19:56:12,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-06 19:56:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 743 transitions. [2021-12-06 19:56:12,787 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8041125541125541 [2021-12-06 19:56:12,787 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 743 transitions. [2021-12-06 19:56:12,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 743 transitions. [2021-12-06 19:56:12,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:12,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 743 transitions. [2021-12-06 19:56:12,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:12,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:12,791 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:12,791 INFO L186 Difference]: Start difference. First operand has 107 places, 113 transitions, 648 flow. Second operand 12 states and 743 transitions. [2021-12-06 19:56:12,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 162 transitions, 1131 flow [2021-12-06 19:56:12,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 162 transitions, 1117 flow, removed 7 selfloop flow, removed 0 redundant places. [2021-12-06 19:56:12,799 INFO L242 Difference]: Finished difference. Result has 121 places, 123 transitions, 850 flow [2021-12-06 19:56:12,799 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=850, PETRI_PLACES=121, PETRI_TRANSITIONS=123} [2021-12-06 19:56:12,799 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 53 predicate places. [2021-12-06 19:56:12,800 INFO L470 AbstractCegarLoop]: Abstraction has has 121 places, 123 transitions, 850 flow [2021-12-06 19:56:12,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:12,800 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:12,800 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:12,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 19:56:13,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:13,001 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:13,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1190561105, now seen corresponding path program 6 times [2021-12-06 19:56:13,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:13,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330194345] [2021-12-06 19:56:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:13,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:13,139 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 19:56:13,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:13,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330194345] [2021-12-06 19:56:13,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330194345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:56:13,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:56:13,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:56:13,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799263859] [2021-12-06 19:56:13,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:56:13,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:56:13,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:13,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:56:13,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:56:13,149 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2021-12-06 19:56:13,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 123 transitions, 850 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:13,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:13,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2021-12-06 19:56:13,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:13,271 INFO L129 PetriNetUnfolder]: 199/570 cut-off events. [2021-12-06 19:56:13,271 INFO L130 PetriNetUnfolder]: For 1517/1519 co-relation queries the response was YES. [2021-12-06 19:56:13,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 570 events. 199/570 cut-off events. For 1517/1519 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3139 event pairs, 91 based on Foata normal form. 1/561 useless extension candidates. Maximal degree in co-relation 1618. Up to 231 conditions per place. [2021-12-06 19:56:13,276 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 68 selfloop transitions, 23 changer transitions 2/137 dead transitions. [2021-12-06 19:56:13,276 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 137 transitions, 1111 flow [2021-12-06 19:56:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:56:13,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 19:56:13,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 315 transitions. [2021-12-06 19:56:13,278 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2021-12-06 19:56:13,278 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 315 transitions. [2021-12-06 19:56:13,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 315 transitions. [2021-12-06 19:56:13,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:13,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 315 transitions. [2021-12-06 19:56:13,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:13,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:13,280 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:13,280 INFO L186 Difference]: Start difference. First operand has 121 places, 123 transitions, 850 flow. Second operand 5 states and 315 transitions. [2021-12-06 19:56:13,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 137 transitions, 1111 flow [2021-12-06 19:56:13,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 137 transitions, 1086 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-12-06 19:56:13,288 INFO L242 Difference]: Finished difference. Result has 122 places, 122 transitions, 849 flow [2021-12-06 19:56:13,288 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=849, PETRI_PLACES=122, PETRI_TRANSITIONS=122} [2021-12-06 19:56:13,288 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 54 predicate places. [2021-12-06 19:56:13,289 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 122 transitions, 849 flow [2021-12-06 19:56:13,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:13,289 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:13,289 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:13,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 19:56:13,289 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:13,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:13,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1682419139, now seen corresponding path program 1 times [2021-12-06 19:56:13,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:13,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339674724] [2021-12-06 19:56:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:13,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:13,359 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 19:56:13,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:13,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339674724] [2021-12-06 19:56:13,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339674724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:56:13,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385043754] [2021-12-06 19:56:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:13,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:13,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:13,361 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:56:13,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:56:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:13,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 19:56:13,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:13,478 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 19:56:13,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:13,563 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 19:56:13,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385043754] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:13,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:56:13,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2021-12-06 19:56:13,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236831863] [2021-12-06 19:56:13,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:13,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:56:13,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:13,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:56:13,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:56:13,566 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2021-12-06 19:56:13,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 122 transitions, 849 flow. Second operand has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:13,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:13,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2021-12-06 19:56:13,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:13,666 INFO L129 PetriNetUnfolder]: 103/595 cut-off events. [2021-12-06 19:56:13,666 INFO L130 PetriNetUnfolder]: For 1064/1093 co-relation queries the response was YES. [2021-12-06 19:56:13,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1612 conditions, 595 events. 103/595 cut-off events. For 1064/1093 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3915 event pairs, 10 based on Foata normal form. 12/597 useless extension candidates. Maximal degree in co-relation 1465. Up to 79 conditions per place. [2021-12-06 19:56:13,671 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 18 selfloop transitions, 5 changer transitions 5/137 dead transitions. [2021-12-06 19:56:13,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 939 flow [2021-12-06 19:56:13,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:56:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 19:56:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 395 transitions. [2021-12-06 19:56:13,673 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.854978354978355 [2021-12-06 19:56:13,673 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 395 transitions. [2021-12-06 19:56:13,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 395 transitions. [2021-12-06 19:56:13,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:13,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 395 transitions. [2021-12-06 19:56:13,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:13,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:13,675 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:13,675 INFO L186 Difference]: Start difference. First operand has 122 places, 122 transitions, 849 flow. Second operand 6 states and 395 transitions. [2021-12-06 19:56:13,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 939 flow [2021-12-06 19:56:13,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 137 transitions, 829 flow, removed 3 selfloop flow, removed 11 redundant places. [2021-12-06 19:56:13,681 INFO L242 Difference]: Finished difference. Result has 118 places, 124 transitions, 771 flow [2021-12-06 19:56:13,682 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=771, PETRI_PLACES=118, PETRI_TRANSITIONS=124} [2021-12-06 19:56:13,682 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 50 predicate places. [2021-12-06 19:56:13,682 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 124 transitions, 771 flow [2021-12-06 19:56:13,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:13,683 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:13,683 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:13,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:56:13,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:13,884 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:13,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:13,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1656979189, now seen corresponding path program 2 times [2021-12-06 19:56:13,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:13,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166322873] [2021-12-06 19:56:13,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:13,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:14,061 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 19:56:14,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:14,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166322873] [2021-12-06 19:56:14,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166322873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:56:14,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748331745] [2021-12-06 19:56:14,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:56:14,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:14,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:14,063 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:56:14,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:56:14,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:56:14,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:56:14,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:56:14,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:14,255 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 19:56:14,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:14,347 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 19:56:14,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748331745] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:14,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:56:14,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-12-06 19:56:14,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633894247] [2021-12-06 19:56:14,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:14,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:56:14,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:14,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:56:14,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:56:14,350 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:56:14,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 124 transitions, 771 flow. Second operand has 19 states, 19 states have (on average 55.78947368421053) internal successors, (1060), 19 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:14,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:14,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:56:14,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:15,461 INFO L129 PetriNetUnfolder]: 1266/3622 cut-off events. [2021-12-06 19:56:15,461 INFO L130 PetriNetUnfolder]: For 5997/5997 co-relation queries the response was YES. [2021-12-06 19:56:15,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11411 conditions, 3622 events. 1266/3622 cut-off events. For 5997/5997 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 30698 event pairs, 136 based on Foata normal form. 34/3644 useless extension candidates. Maximal degree in co-relation 11308. Up to 388 conditions per place. [2021-12-06 19:56:15,489 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 231 selfloop transitions, 207 changer transitions 28/508 dead transitions. [2021-12-06 19:56:15,489 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 508 transitions, 4079 flow [2021-12-06 19:56:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 19:56:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-12-06 19:56:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3555 transitions. [2021-12-06 19:56:15,497 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7568660847349372 [2021-12-06 19:56:15,498 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3555 transitions. [2021-12-06 19:56:15,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3555 transitions. [2021-12-06 19:56:15,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:15,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3555 transitions. [2021-12-06 19:56:15,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 58.278688524590166) internal successors, (3555), 61 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:15,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 77.0) internal successors, (4774), 62 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:15,529 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 77.0) internal successors, (4774), 62 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:15,529 INFO L186 Difference]: Start difference. First operand has 118 places, 124 transitions, 771 flow. Second operand 61 states and 3555 transitions. [2021-12-06 19:56:15,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 508 transitions, 4079 flow [2021-12-06 19:56:15,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 508 transitions, 4007 flow, removed 36 selfloop flow, removed 2 redundant places. [2021-12-06 19:56:15,545 INFO L242 Difference]: Finished difference. Result has 190 places, 327 transitions, 2668 flow [2021-12-06 19:56:15,545 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=2668, PETRI_PLACES=190, PETRI_TRANSITIONS=327} [2021-12-06 19:56:15,545 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 122 predicate places. [2021-12-06 19:56:15,546 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 327 transitions, 2668 flow [2021-12-06 19:56:15,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.78947368421053) internal successors, (1060), 19 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:15,546 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:15,546 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:15,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 19:56:15,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 19:56:15,747 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:15,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1790021439, now seen corresponding path program 3 times [2021-12-06 19:56:15,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:15,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080886376] [2021-12-06 19:56:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:15,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:15,913 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 19:56:15,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:15,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080886376] [2021-12-06 19:56:15,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080886376] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:56:15,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404605137] [2021-12-06 19:56:15,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:56:15,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:15,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:15,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:56:15,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:56:15,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 19:56:15,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:56:15,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:56:15,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:16,073 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 19:56:16,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:16,136 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 19:56:16,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404605137] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:16,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:56:16,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2021-12-06 19:56:16,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575270312] [2021-12-06 19:56:16,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:16,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 19:56:16,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:16,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 19:56:16,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:56:16,138 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:56:16,139 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 327 transitions, 2668 flow. Second operand has 16 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:16,139 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:16,139 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:56:16,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:16,929 INFO L129 PetriNetUnfolder]: 1421/4102 cut-off events. [2021-12-06 19:56:16,929 INFO L130 PetriNetUnfolder]: For 17951/17951 co-relation queries the response was YES. [2021-12-06 19:56:16,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16930 conditions, 4102 events. 1421/4102 cut-off events. For 17951/17951 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 36168 event pairs, 243 based on Foata normal form. 19/4087 useless extension candidates. Maximal degree in co-relation 15806. Up to 963 conditions per place. [2021-12-06 19:56:16,966 INFO L132 encePairwiseOnDemand]: 66/77 looper letters, 190 selfloop transitions, 268 changer transitions 33/533 dead transitions. [2021-12-06 19:56:16,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 533 transitions, 5469 flow [2021-12-06 19:56:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 19:56:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-06 19:56:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1355 transitions. [2021-12-06 19:56:16,969 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7651044607566346 [2021-12-06 19:56:16,969 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1355 transitions. [2021-12-06 19:56:16,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1355 transitions. [2021-12-06 19:56:16,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:16,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1355 transitions. [2021-12-06 19:56:16,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 58.91304347826087) internal successors, (1355), 23 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:16,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:16,977 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:16,977 INFO L186 Difference]: Start difference. First operand has 190 places, 327 transitions, 2668 flow. Second operand 23 states and 1355 transitions. [2021-12-06 19:56:16,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 533 transitions, 5469 flow [2021-12-06 19:56:17,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 533 transitions, 5102 flow, removed 120 selfloop flow, removed 7 redundant places. [2021-12-06 19:56:17,052 INFO L242 Difference]: Finished difference. Result has 215 places, 413 transitions, 4025 flow [2021-12-06 19:56:17,053 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4025, PETRI_PLACES=215, PETRI_TRANSITIONS=413} [2021-12-06 19:56:17,053 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 147 predicate places. [2021-12-06 19:56:17,053 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 413 transitions, 4025 flow [2021-12-06 19:56:17,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:17,054 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:17,054 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:17,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:56:17,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 19:56:17,256 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:17,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:17,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1983759899, now seen corresponding path program 4 times [2021-12-06 19:56:17,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:17,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906704166] [2021-12-06 19:56:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:17,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:17,353 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 19:56:17,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:17,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906704166] [2021-12-06 19:56:17,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906704166] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:56:17,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695110334] [2021-12-06 19:56:17,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:56:17,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:17,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:17,355 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:56:17,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:56:17,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:56:17,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:56:17,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:56:17,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:17,559 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 19:56:17,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:17,636 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 19:56:17,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695110334] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:17,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:56:17,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-06 19:56:17,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589461077] [2021-12-06 19:56:17,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:17,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:56:17,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:17,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:56:17,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:56:17,639 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:56:17,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 413 transitions, 4025 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:17,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:17,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:56:17,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:18,729 INFO L129 PetriNetUnfolder]: 1688/4815 cut-off events. [2021-12-06 19:56:18,730 INFO L130 PetriNetUnfolder]: For 32142/32142 co-relation queries the response was YES. [2021-12-06 19:56:18,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22322 conditions, 4815 events. 1688/4815 cut-off events. For 32142/32142 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 43903 event pairs, 221 based on Foata normal form. 23/4794 useless extension candidates. Maximal degree in co-relation 21111. Up to 1022 conditions per place. [2021-12-06 19:56:18,773 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 219 selfloop transitions, 356 changer transitions 4/621 dead transitions. [2021-12-06 19:56:18,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 621 transitions, 7180 flow [2021-12-06 19:56:18,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 19:56:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-06 19:56:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1753 transitions. [2021-12-06 19:56:18,776 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7588744588744589 [2021-12-06 19:56:18,776 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1753 transitions. [2021-12-06 19:56:18,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1753 transitions. [2021-12-06 19:56:18,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:18,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1753 transitions. [2021-12-06 19:56:18,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.43333333333333) internal successors, (1753), 30 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:18,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:18,781 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:18,781 INFO L186 Difference]: Start difference. First operand has 215 places, 413 transitions, 4025 flow. Second operand 30 states and 1753 transitions. [2021-12-06 19:56:18,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 621 transitions, 7180 flow [2021-12-06 19:56:18,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 621 transitions, 7127 flow, removed 24 selfloop flow, removed 2 redundant places. [2021-12-06 19:56:18,904 INFO L242 Difference]: Finished difference. Result has 256 places, 512 transitions, 6429 flow [2021-12-06 19:56:18,905 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6429, PETRI_PLACES=256, PETRI_TRANSITIONS=512} [2021-12-06 19:56:18,905 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 188 predicate places. [2021-12-06 19:56:18,905 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 512 transitions, 6429 flow [2021-12-06 19:56:18,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:18,906 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:18,906 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:18,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:56:19,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 19:56:19,108 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:19,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:19,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1217209175, now seen corresponding path program 5 times [2021-12-06 19:56:19,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:19,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887780797] [2021-12-06 19:56:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:19,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:19,192 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 19:56:19,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:19,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887780797] [2021-12-06 19:56:19,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887780797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:56:19,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702105917] [2021-12-06 19:56:19,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:56:19,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:19,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:19,193 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:56:19,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:56:19,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 19:56:19,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:56:19,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:56:19,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:19,329 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 19:56:19,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:19,392 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 19:56:19,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702105917] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:19,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:56:19,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-06 19:56:19,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341907989] [2021-12-06 19:56:19,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:19,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 19:56:19,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:19,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 19:56:19,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:56:19,395 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:56:19,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 512 transitions, 6429 flow. Second operand has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:19,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:19,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:56:19,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:20,924 INFO L129 PetriNetUnfolder]: 2056/6005 cut-off events. [2021-12-06 19:56:20,925 INFO L130 PetriNetUnfolder]: For 63127/63127 co-relation queries the response was YES. [2021-12-06 19:56:20,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32168 conditions, 6005 events. 2056/6005 cut-off events. For 63127/63127 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 58570 event pairs, 190 based on Foata normal form. 4/5983 useless extension candidates. Maximal degree in co-relation 31845. Up to 791 conditions per place. [2021-12-06 19:56:20,999 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 342 selfloop transitions, 417 changer transitions 13/814 dead transitions. [2021-12-06 19:56:21,000 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 814 transitions, 11197 flow [2021-12-06 19:56:21,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 19:56:21,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-06 19:56:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2713 transitions. [2021-12-06 19:56:21,003 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7496546007184305 [2021-12-06 19:56:21,003 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2713 transitions. [2021-12-06 19:56:21,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2713 transitions. [2021-12-06 19:56:21,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:21,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2713 transitions. [2021-12-06 19:56:21,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.723404255319146) internal successors, (2713), 47 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:21,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:21,012 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:21,012 INFO L186 Difference]: Start difference. First operand has 256 places, 512 transitions, 6429 flow. Second operand 47 states and 2713 transitions. [2021-12-06 19:56:21,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 814 transitions, 11197 flow [2021-12-06 19:56:21,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 814 transitions, 10756 flow, removed 93 selfloop flow, removed 9 redundant places. [2021-12-06 19:56:21,309 INFO L242 Difference]: Finished difference. Result has 307 places, 657 transitions, 9167 flow [2021-12-06 19:56:21,309 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=6120, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=9167, PETRI_PLACES=307, PETRI_TRANSITIONS=657} [2021-12-06 19:56:21,310 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 239 predicate places. [2021-12-06 19:56:21,310 INFO L470 AbstractCegarLoop]: Abstraction has has 307 places, 657 transitions, 9167 flow [2021-12-06 19:56:21,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:21,311 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:21,311 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:21,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 19:56:21,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 19:56:21,513 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:21,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:21,514 INFO L85 PathProgramCache]: Analyzing trace with hash 118370099, now seen corresponding path program 6 times [2021-12-06 19:56:21,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:21,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964606134] [2021-12-06 19:56:21,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:21,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:21,597 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 19:56:21,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:21,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964606134] [2021-12-06 19:56:21,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964606134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:56:21,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095409100] [2021-12-06 19:56:21,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:56:21,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:21,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:21,598 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:56:21,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:56:21,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-06 19:56:21,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:56:21,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:56:21,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:21,743 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 19:56:21,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:21,825 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 19:56:21,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095409100] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:21,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:56:21,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-06 19:56:21,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122641932] [2021-12-06 19:56:21,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:21,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:56:21,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:21,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:56:21,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:56:21,827 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:56:21,828 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 657 transitions, 9167 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:21,828 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:21,828 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:56:21,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:23,765 INFO L129 PetriNetUnfolder]: 2248/6588 cut-off events. [2021-12-06 19:56:23,765 INFO L130 PetriNetUnfolder]: For 78964/78964 co-relation queries the response was YES. [2021-12-06 19:56:23,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38187 conditions, 6588 events. 2248/6588 cut-off events. For 78964/78964 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 65877 event pairs, 239 based on Foata normal form. 19/6586 useless extension candidates. Maximal degree in co-relation 37963. Up to 1340 conditions per place. [2021-12-06 19:56:23,861 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 270 selfloop transitions, 524 changer transitions 3/839 dead transitions. [2021-12-06 19:56:23,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 839 transitions, 12797 flow [2021-12-06 19:56:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 19:56:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-06 19:56:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2368 transitions. [2021-12-06 19:56:23,864 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7500791891035794 [2021-12-06 19:56:23,865 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2368 transitions. [2021-12-06 19:56:23,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2368 transitions. [2021-12-06 19:56:23,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:23,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2368 transitions. [2021-12-06 19:56:23,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.75609756097561) internal successors, (2368), 41 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:23,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:23,874 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:23,874 INFO L186 Difference]: Start difference. First operand has 307 places, 657 transitions, 9167 flow. Second operand 41 states and 2368 transitions. [2021-12-06 19:56:23,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 839 transitions, 12797 flow [2021-12-06 19:56:24,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 839 transitions, 12160 flow, removed 210 selfloop flow, removed 3 redundant places. [2021-12-06 19:56:24,491 INFO L242 Difference]: Finished difference. Result has 352 places, 723 transitions, 11195 flow [2021-12-06 19:56:24,491 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=8649, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=11195, PETRI_PLACES=352, PETRI_TRANSITIONS=723} [2021-12-06 19:56:24,492 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 284 predicate places. [2021-12-06 19:56:24,492 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 723 transitions, 11195 flow [2021-12-06 19:56:24,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:24,493 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:24,493 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:24,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 19:56:24,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:24,695 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:24,696 INFO L85 PathProgramCache]: Analyzing trace with hash -151736549, now seen corresponding path program 7 times [2021-12-06 19:56:24,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:24,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339486326] [2021-12-06 19:56:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:24,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:24,779 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 19:56:24,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:24,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339486326] [2021-12-06 19:56:24,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339486326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:56:24,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976629699] [2021-12-06 19:56:24,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:56:24,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:24,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:24,780 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:56:24,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:56:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:24,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:56:24,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:56:24,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:24,995 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 19:56:24,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976629699] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:24,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:56:24,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-06 19:56:24,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90984840] [2021-12-06 19:56:24,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:24,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 19:56:24,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:24,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 19:56:24,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:56:24,999 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:56:25,000 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 723 transitions, 11195 flow. Second operand has 17 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:25,001 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:25,001 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:56:25,001 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:27,342 INFO L129 PetriNetUnfolder]: 2315/6806 cut-off events. [2021-12-06 19:56:27,342 INFO L130 PetriNetUnfolder]: For 94421/94421 co-relation queries the response was YES. [2021-12-06 19:56:27,390 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40883 conditions, 6806 events. 2315/6806 cut-off events. For 94421/94421 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 68521 event pairs, 234 based on Foata normal form. 31/6802 useless extension candidates. Maximal degree in co-relation 40646. Up to 1016 conditions per place. [2021-12-06 19:56:27,415 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 328 selfloop transitions, 568 changer transitions 28/966 dead transitions. [2021-12-06 19:56:27,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 966 transitions, 15569 flow [2021-12-06 19:56:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-06 19:56:27,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-12-06 19:56:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3914 transitions. [2021-12-06 19:56:27,419 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7475171886936592 [2021-12-06 19:56:27,419 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3914 transitions. [2021-12-06 19:56:27,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3914 transitions. [2021-12-06 19:56:27,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:27,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3914 transitions. [2021-12-06 19:56:27,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 57.55882352941177) internal successors, (3914), 68 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:27,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:27,429 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:27,429 INFO L186 Difference]: Start difference. First operand has 352 places, 723 transitions, 11195 flow. Second operand 68 states and 3914 transitions. [2021-12-06 19:56:27,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 966 transitions, 15569 flow [2021-12-06 19:56:28,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 966 transitions, 15038 flow, removed 83 selfloop flow, removed 25 redundant places. [2021-12-06 19:56:28,167 INFO L242 Difference]: Finished difference. Result has 403 places, 772 transitions, 13155 flow [2021-12-06 19:56:28,168 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=10686, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=13155, PETRI_PLACES=403, PETRI_TRANSITIONS=772} [2021-12-06 19:56:28,168 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 335 predicate places. [2021-12-06 19:56:28,168 INFO L470 AbstractCegarLoop]: Abstraction has has 403 places, 772 transitions, 13155 flow [2021-12-06 19:56:28,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:28,168 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:28,168 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:28,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 19:56:28,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 19:56:28,370 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:28,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:28,371 INFO L85 PathProgramCache]: Analyzing trace with hash -981160703, now seen corresponding path program 8 times [2021-12-06 19:56:28,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:28,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306109336] [2021-12-06 19:56:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:28,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:28,446 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 19:56:28,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:28,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306109336] [2021-12-06 19:56:28,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306109336] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:56:28,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553783045] [2021-12-06 19:56:28,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:56:28,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:28,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:28,447 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:56:28,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:56:28,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:56:28,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:56:28,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:56:28,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:28,580 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 19:56:28,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:28,643 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 19:56:28,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553783045] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:28,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:56:28,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-06 19:56:28,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283385534] [2021-12-06 19:56:28,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:28,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 19:56:28,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:28,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 19:56:28,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-12-06 19:56:28,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:56:28,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 772 transitions, 13155 flow. Second operand has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:28,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:28,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:56:28,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:30,681 INFO L129 PetriNetUnfolder]: 2327/6841 cut-off events. [2021-12-06 19:56:30,682 INFO L130 PetriNetUnfolder]: For 108630/108630 co-relation queries the response was YES. [2021-12-06 19:56:30,730 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43399 conditions, 6841 events. 2327/6841 cut-off events. For 108630/108630 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 68847 event pairs, 657 based on Foata normal form. 1/6744 useless extension candidates. Maximal degree in co-relation 43150. Up to 2226 conditions per place. [2021-12-06 19:56:30,755 INFO L132 encePairwiseOnDemand]: 66/77 looper letters, 549 selfloop transitions, 245 changer transitions 8/844 dead transitions. [2021-12-06 19:56:30,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 844 transitions, 15539 flow [2021-12-06 19:56:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 19:56:30,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-06 19:56:30,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1386 transitions. [2021-12-06 19:56:30,757 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-12-06 19:56:30,757 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1386 transitions. [2021-12-06 19:56:30,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1386 transitions. [2021-12-06 19:56:30,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:30,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1386 transitions. [2021-12-06 19:56:30,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.75) internal successors, (1386), 24 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:30,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:30,761 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:30,761 INFO L186 Difference]: Start difference. First operand has 403 places, 772 transitions, 13155 flow. Second operand 24 states and 1386 transitions. [2021-12-06 19:56:30,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 844 transitions, 15539 flow [2021-12-06 19:56:31,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 844 transitions, 15071 flow, removed 76 selfloop flow, removed 30 redundant places. [2021-12-06 19:56:31,501 INFO L242 Difference]: Finished difference. Result has 405 places, 791 transitions, 13538 flow [2021-12-06 19:56:31,501 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=12707, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=13538, PETRI_PLACES=405, PETRI_TRANSITIONS=791} [2021-12-06 19:56:31,502 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 337 predicate places. [2021-12-06 19:56:31,502 INFO L470 AbstractCegarLoop]: Abstraction has has 405 places, 791 transitions, 13538 flow [2021-12-06 19:56:31,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:31,502 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:31,502 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] [2021-12-06 19:56:31,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 19:56:31,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:31,703 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:31,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:31,705 INFO L85 PathProgramCache]: Analyzing trace with hash 331168385, now seen corresponding path program 9 times [2021-12-06 19:56:31,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:31,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693173685] [2021-12-06 19:56:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:31,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:31,762 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 19:56:31,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:31,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693173685] [2021-12-06 19:56:31,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693173685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:56:31,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260740698] [2021-12-06 19:56:31,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:56:31,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:31,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:31,764 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:56:31,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 19:56:31,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 19:56:31,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:56:31,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:56:31,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:56:31,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:31,978 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 19:56:31,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260740698] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:31,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:56:31,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-06 19:56:31,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474272318] [2021-12-06 19:56:31,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:31,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:56:31,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:31,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:56:31,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:56:31,980 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:56:31,981 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 791 transitions, 13538 flow. Second operand has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:31,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:31,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:56:31,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:35,596 INFO L129 PetriNetUnfolder]: 3673/10200 cut-off events. [2021-12-06 19:56:35,596 INFO L130 PetriNetUnfolder]: For 187722/187722 co-relation queries the response was YES. [2021-12-06 19:56:35,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68587 conditions, 10200 events. 3673/10200 cut-off events. For 187722/187722 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 107773 event pairs, 564 based on Foata normal form. 30/10127 useless extension candidates. Maximal degree in co-relation 68395. Up to 1978 conditions per place. [2021-12-06 19:56:35,810 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 488 selfloop transitions, 889 changer transitions 17/1436 dead transitions. [2021-12-06 19:56:35,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 1436 transitions, 27257 flow [2021-12-06 19:56:35,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-06 19:56:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-12-06 19:56:35,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 3930 transitions. [2021-12-06 19:56:35,816 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7396950875211745 [2021-12-06 19:56:35,816 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 3930 transitions. [2021-12-06 19:56:35,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 3930 transitions. [2021-12-06 19:56:35,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:35,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 3930 transitions. [2021-12-06 19:56:35,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 56.95652173913044) internal successors, (3930), 69 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:35,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:35,828 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:35,828 INFO L186 Difference]: Start difference. First operand has 405 places, 791 transitions, 13538 flow. Second operand 69 states and 3930 transitions. [2021-12-06 19:56:35,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 1436 transitions, 27257 flow [2021-12-06 19:56:37,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1436 transitions, 26808 flow, removed 20 selfloop flow, removed 4 redundant places. [2021-12-06 19:56:37,105 INFO L242 Difference]: Finished difference. Result has 485 places, 1194 transitions, 24458 flow [2021-12-06 19:56:37,106 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=13291, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=24458, PETRI_PLACES=485, PETRI_TRANSITIONS=1194} [2021-12-06 19:56:37,107 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 417 predicate places. [2021-12-06 19:56:37,107 INFO L470 AbstractCegarLoop]: Abstraction has has 485 places, 1194 transitions, 24458 flow [2021-12-06 19:56:37,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:37,107 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:37,107 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:37,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-06 19:56:37,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 19:56:37,308 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:37,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:37,310 INFO L85 PathProgramCache]: Analyzing trace with hash -838217509, now seen corresponding path program 10 times [2021-12-06 19:56:37,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:37,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286559432] [2021-12-06 19:56:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:37,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:37,392 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 19:56:37,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:37,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286559432] [2021-12-06 19:56:37,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286559432] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:56:37,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636023181] [2021-12-06 19:56:37,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:56:37,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:37,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:37,394 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:56:37,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 19:56:37,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:56:37,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:56:37,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:56:37,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:37,560 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 19:56:37,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:37,632 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 19:56:37,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636023181] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:37,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:56:37,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-06 19:56:37,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050059442] [2021-12-06 19:56:37,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:37,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:56:37,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:37,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:56:37,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:56:37,634 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:56:37,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 1194 transitions, 24458 flow. Second operand has 19 states, 19 states have (on average 55.73684210526316) internal successors, (1059), 19 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:37,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:37,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:56:37,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:56:45,156 INFO L129 PetriNetUnfolder]: 6250/17016 cut-off events. [2021-12-06 19:56:45,156 INFO L130 PetriNetUnfolder]: For 440564/440564 co-relation queries the response was YES. [2021-12-06 19:56:45,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130530 conditions, 17016 events. 6250/17016 cut-off events. For 440564/440564 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 195108 event pairs, 817 based on Foata normal form. 45/16917 useless extension candidates. Maximal degree in co-relation 129212. Up to 2737 conditions per place. [2021-12-06 19:56:45,415 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 663 selfloop transitions, 1697 changer transitions 31/2433 dead transitions. [2021-12-06 19:56:45,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 2433 transitions, 54424 flow [2021-12-06 19:56:45,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-06 19:56:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-12-06 19:56:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4916 transitions. [2021-12-06 19:56:45,419 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7423739051646029 [2021-12-06 19:56:45,419 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4916 transitions. [2021-12-06 19:56:45,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4916 transitions. [2021-12-06 19:56:45,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:56:45,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4916 transitions. [2021-12-06 19:56:45,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 57.16279069767442) internal successors, (4916), 86 states have internal predecessors, (4916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:45,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:45,432 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:45,432 INFO L186 Difference]: Start difference. First operand has 485 places, 1194 transitions, 24458 flow. Second operand 86 states and 4916 transitions. [2021-12-06 19:56:45,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 2433 transitions, 54424 flow [2021-12-06 19:56:51,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 2433 transitions, 53393 flow, removed 77 selfloop flow, removed 36 redundant places. [2021-12-06 19:56:51,114 INFO L242 Difference]: Finished difference. Result has 556 places, 2081 transitions, 50135 flow [2021-12-06 19:56:51,115 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=23792, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=865, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=50135, PETRI_PLACES=556, PETRI_TRANSITIONS=2081} [2021-12-06 19:56:51,116 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 488 predicate places. [2021-12-06 19:56:51,116 INFO L470 AbstractCegarLoop]: Abstraction has has 556 places, 2081 transitions, 50135 flow [2021-12-06 19:56:51,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.73684210526316) internal successors, (1059), 19 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:51,116 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:56:51,116 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:51,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 19:56:51,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 19:56:51,317 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:56:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:51,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1400475587, now seen corresponding path program 11 times [2021-12-06 19:56:51,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:51,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917669252] [2021-12-06 19:56:51,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:51,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:51,395 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 19:56:51,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:51,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917669252] [2021-12-06 19:56:51,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917669252] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:56:51,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851157008] [2021-12-06 19:56:51,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:56:51,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:51,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:51,396 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:56:51,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 19:56:51,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 19:56:51,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:56:51,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:56:51,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:51,518 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 19:56:51,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:51,571 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 19:56:51,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851157008] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:51,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:56:51,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-06 19:56:51,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41217416] [2021-12-06 19:56:51,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:51,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:56:51,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:51,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:56:51,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:56:51,573 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:56:51,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 2081 transitions, 50135 flow. Second operand has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:51,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:56:51,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:56:51,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:57:02,605 INFO L129 PetriNetUnfolder]: 6307/17364 cut-off events. [2021-12-06 19:57:02,605 INFO L130 PetriNetUnfolder]: For 577168/577168 co-relation queries the response was YES. [2021-12-06 19:57:02,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 146449 conditions, 17364 events. 6307/17364 cut-off events. For 577168/577168 co-relation queries the response was YES. Maximal size of possible extension queue 1217. Compared 201459 event pairs, 839 based on Foata normal form. 7/17209 useless extension candidates. Maximal degree in co-relation 145139. Up to 3276 conditions per place. [2021-12-06 19:57:02,912 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 989 selfloop transitions, 1260 changer transitions 18/2309 dead transitions. [2021-12-06 19:57:02,912 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 2309 transitions, 58283 flow [2021-12-06 19:57:02,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 19:57:02,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-12-06 19:57:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2887 transitions. [2021-12-06 19:57:02,915 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7498701298701299 [2021-12-06 19:57:02,915 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2887 transitions. [2021-12-06 19:57:02,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2887 transitions. [2021-12-06 19:57:02,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:57:02,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2887 transitions. [2021-12-06 19:57:02,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.74) internal successors, (2887), 50 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:57:02,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 77.0) internal successors, (3927), 51 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:57:02,925 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 77.0) internal successors, (3927), 51 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:57:02,926 INFO L186 Difference]: Start difference. First operand has 556 places, 2081 transitions, 50135 flow. Second operand 50 states and 2887 transitions. [2021-12-06 19:57:02,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 2309 transitions, 58283 flow [2021-12-06 19:57:10,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 2309 transitions, 57719 flow, removed 177 selfloop flow, removed 35 redundant places. [2021-12-06 19:57:10,713 INFO L242 Difference]: Finished difference. Result has 577 places, 2117 transitions, 53869 flow [2021-12-06 19:57:10,715 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=49633, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=53869, PETRI_PLACES=577, PETRI_TRANSITIONS=2117} [2021-12-06 19:57:10,715 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 509 predicate places. [2021-12-06 19:57:10,715 INFO L470 AbstractCegarLoop]: Abstraction has has 577 places, 2117 transitions, 53869 flow [2021-12-06 19:57:10,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:57:10,716 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:57:10,716 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:10,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 19:57:10,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 19:57:10,917 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:57:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:10,917 INFO L85 PathProgramCache]: Analyzing trace with hash -757615803, now seen corresponding path program 12 times [2021-12-06 19:57:10,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:10,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721721966] [2021-12-06 19:57:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:10,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:10,961 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 19:57:10,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:10,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721721966] [2021-12-06 19:57:10,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721721966] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:10,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757727334] [2021-12-06 19:57:10,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:57:10,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:10,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:10,962 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:57:10,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 19:57:11,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 19:57:11,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:57:11,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:57:11,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:11,092 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 19:57:11,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:57:11,150 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 19:57:11,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757727334] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:57:11,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:57:11,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-06 19:57:11,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582991186] [2021-12-06 19:57:11,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:57:11,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:57:11,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:11,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:57:11,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:57:11,152 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:57:11,152 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 2117 transitions, 53869 flow. Second operand has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:57:11,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:57:11,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:57:11,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:57:23,342 INFO L129 PetriNetUnfolder]: 6367/17760 cut-off events. [2021-12-06 19:57:23,342 INFO L130 PetriNetUnfolder]: For 657194/657194 co-relation queries the response was YES. [2021-12-06 19:57:23,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 154486 conditions, 17760 events. 6367/17760 cut-off events. For 657194/657194 co-relation queries the response was YES. Maximal size of possible extension queue 1240. Compared 208434 event pairs, 926 based on Foata normal form. 8/17584 useless extension candidates. Maximal degree in co-relation 153213. Up to 2429 conditions per place. [2021-12-06 19:57:23,682 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 914 selfloop transitions, 1481 changer transitions 11/2448 dead transitions. [2021-12-06 19:57:23,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 2448 transitions, 64426 flow [2021-12-06 19:57:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 19:57:23,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-12-06 19:57:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4016 transitions. [2021-12-06 19:57:23,687 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7450834879406308 [2021-12-06 19:57:23,687 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4016 transitions. [2021-12-06 19:57:23,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4016 transitions. [2021-12-06 19:57:23,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:57:23,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4016 transitions. [2021-12-06 19:57:23,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 57.371428571428574) internal successors, (4016), 70 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:57:23,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:57:23,701 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:57:23,701 INFO L186 Difference]: Start difference. First operand has 577 places, 2117 transitions, 53869 flow. Second operand 70 states and 4016 transitions. [2021-12-06 19:57:23,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 2448 transitions, 64426 flow [2021-12-06 19:57:31,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 2448 transitions, 62811 flow, removed 70 selfloop flow, removed 40 redundant places. [2021-12-06 19:57:31,961 INFO L242 Difference]: Finished difference. Result has 611 places, 2226 transitions, 58861 flow [2021-12-06 19:57:31,962 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=52306, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=58861, PETRI_PLACES=611, PETRI_TRANSITIONS=2226} [2021-12-06 19:57:31,963 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 543 predicate places. [2021-12-06 19:57:31,963 INFO L470 AbstractCegarLoop]: Abstraction has has 611 places, 2226 transitions, 58861 flow [2021-12-06 19:57:31,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:57:31,963 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:57:31,963 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:31,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 19:57:32,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:32,165 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:57:32,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:32,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1424025787, now seen corresponding path program 13 times [2021-12-06 19:57:32,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:32,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471728932] [2021-12-06 19:57:32,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:32,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:32,245 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 19:57:32,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:32,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471728932] [2021-12-06 19:57:32,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471728932] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:32,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219863563] [2021-12-06 19:57:32,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:57:32,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:32,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:32,246 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:57:32,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 19:57:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:32,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:57:32,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:32,368 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 19:57:32,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:57:32,430 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 19:57:32,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219863563] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:57:32,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:57:32,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2021-12-06 19:57:32,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568556129] [2021-12-06 19:57:32,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:57:32,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 19:57:32,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:32,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 19:57:32,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:57:32,432 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:57:32,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 2226 transitions, 58861 flow. Second operand has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 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 19:57:32,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:57:32,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:57:32,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:57:44,553 INFO L129 PetriNetUnfolder]: 6368/17596 cut-off events. [2021-12-06 19:57:44,553 INFO L130 PetriNetUnfolder]: For 711572/711572 co-relation queries the response was YES. [2021-12-06 19:57:44,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160161 conditions, 17596 events. 6368/17596 cut-off events. For 711572/711572 co-relation queries the response was YES. Maximal size of possible extension queue 1208. Compared 205659 event pairs, 955 based on Foata normal form. 1/17400 useless extension candidates. Maximal degree in co-relation 159996. Up to 8449 conditions per place. [2021-12-06 19:57:44,895 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1813 selfloop transitions, 407 changer transitions 9/2271 dead transitions. [2021-12-06 19:57:44,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 2271 transitions, 64154 flow [2021-12-06 19:57:44,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 19:57:44,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 19:57:44,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 924 transitions. [2021-12-06 19:57:44,896 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-12-06 19:57:44,896 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 924 transitions. [2021-12-06 19:57:44,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 924 transitions. [2021-12-06 19:57:44,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:57:44,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 924 transitions. [2021-12-06 19:57:44,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 57.75) internal successors, (924), 16 states have internal predecessors, (924), 0 states have call successors, (0), 0 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 19:57:44,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 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 19:57:44,899 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 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 19:57:44,899 INFO L186 Difference]: Start difference. First operand has 611 places, 2226 transitions, 58861 flow. Second operand 16 states and 924 transitions. [2021-12-06 19:57:44,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 2271 transitions, 64154 flow [2021-12-06 19:57:53,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 2271 transitions, 62513 flow, removed 128 selfloop flow, removed 47 redundant places. [2021-12-06 19:57:54,055 INFO L242 Difference]: Finished difference. Result has 583 places, 2240 transitions, 58592 flow [2021-12-06 19:57:54,057 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=57235, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=58592, PETRI_PLACES=583, PETRI_TRANSITIONS=2240} [2021-12-06 19:57:54,057 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 515 predicate places. [2021-12-06 19:57:54,057 INFO L470 AbstractCegarLoop]: Abstraction has has 583 places, 2240 transitions, 58592 flow [2021-12-06 19:57:54,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 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 19:57:54,058 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:57:54,058 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:54,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 19:57:54,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:54,259 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:57:54,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:54,260 INFO L85 PathProgramCache]: Analyzing trace with hash 339136801, now seen corresponding path program 14 times [2021-12-06 19:57:54,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:54,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119241302] [2021-12-06 19:57:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:54,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:54,334 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 19:57:54,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:54,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119241302] [2021-12-06 19:57:54,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119241302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:54,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852647350] [2021-12-06 19:57:54,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:57:54,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:54,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:54,335 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:57:54,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 19:57:54,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:57:54,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:57:54,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:57:54,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:54,476 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 19:57:54,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:57:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:57:54,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852647350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:57:54,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:57:54,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-12-06 19:57:54,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091335185] [2021-12-06 19:57:54,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:57:54,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:57:54,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:54,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:57:54,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:57:54,543 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:57:54,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 2240 transitions, 58592 flow. Second operand has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 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 19:57:54,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:57:54,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:57:54,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:58:07,158 INFO L129 PetriNetUnfolder]: 6406/17823 cut-off events. [2021-12-06 19:58:07,158 INFO L130 PetriNetUnfolder]: For 708401/708401 co-relation queries the response was YES. [2021-12-06 19:58:07,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160563 conditions, 17823 events. 6406/17823 cut-off events. For 708401/708401 co-relation queries the response was YES. Maximal size of possible extension queue 1213. Compared 208863 event pairs, 698 based on Foata normal form. 4/17650 useless extension candidates. Maximal degree in co-relation 160164. Up to 5201 conditions per place. [2021-12-06 19:58:07,527 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1501 selfloop transitions, 881 changer transitions 20/2444 dead transitions. [2021-12-06 19:58:07,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 2444 transitions, 67162 flow [2021-12-06 19:58:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 19:58:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-12-06 19:58:07,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3254 transitions. [2021-12-06 19:58:07,530 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7546382189239332 [2021-12-06 19:58:07,530 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3254 transitions. [2021-12-06 19:58:07,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3254 transitions. [2021-12-06 19:58:07,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:58:07,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3254 transitions. [2021-12-06 19:58:07,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 58.107142857142854) internal successors, (3254), 56 states have internal predecessors, (3254), 0 states have call successors, (0), 0 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 19:58:07,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 77.0) internal successors, (4389), 57 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:58:07,537 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 77.0) internal successors, (4389), 57 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:58:07,537 INFO L186 Difference]: Start difference. First operand has 583 places, 2240 transitions, 58592 flow. Second operand 56 states and 3254 transitions. [2021-12-06 19:58:07,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 2444 transitions, 67162 flow [2021-12-06 19:58:16,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 628 places, 2444 transitions, 66706 flow, removed 92 selfloop flow, removed 7 redundant places. [2021-12-06 19:58:16,811 INFO L242 Difference]: Finished difference. Result has 638 places, 2295 transitions, 61914 flow [2021-12-06 19:58:16,813 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=58276, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=829, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=61914, PETRI_PLACES=638, PETRI_TRANSITIONS=2295} [2021-12-06 19:58:16,813 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 570 predicate places. [2021-12-06 19:58:16,814 INFO L470 AbstractCegarLoop]: Abstraction has has 638 places, 2295 transitions, 61914 flow [2021-12-06 19:58:16,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 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 19:58:16,814 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:58:16,814 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:16,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 19:58:17,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 19:58:17,015 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:58:17,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:17,017 INFO L85 PathProgramCache]: Analyzing trace with hash 617201733, now seen corresponding path program 15 times [2021-12-06 19:58:17,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:58:17,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944058710] [2021-12-06 19:58:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:17,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:58:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:17,094 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 19:58:17,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:58:17,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944058710] [2021-12-06 19:58:17,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944058710] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:58:17,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861316317] [2021-12-06 19:58:17,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:58:17,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:58:17,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:58:17,095 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:58:17,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 19:58:17,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 19:58:17,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:58:17,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:58:17,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:17,237 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 19:58:17,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:58:17,317 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 19:58:17,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861316317] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:58:17,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:58:17,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2021-12-06 19:58:17,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819947669] [2021-12-06 19:58:17,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:58:17,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 19:58:17,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:58:17,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 19:58:17,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:58:17,319 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:58:17,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 2295 transitions, 61914 flow. Second operand has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 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 19:58:17,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:58:17,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:58:17,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:58:32,281 INFO L129 PetriNetUnfolder]: 7177/20000 cut-off events. [2021-12-06 19:58:32,281 INFO L130 PetriNetUnfolder]: For 876012/876012 co-relation queries the response was YES. [2021-12-06 19:58:32,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186455 conditions, 20000 events. 7177/20000 cut-off events. For 876012/876012 co-relation queries the response was YES. Maximal size of possible extension queue 1386. Compared 239019 event pairs, 1065 based on Foata normal form. 4/19773 useless extension candidates. Maximal degree in co-relation 185993. Up to 7493 conditions per place. [2021-12-06 19:58:32,709 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1956 selfloop transitions, 724 changer transitions 17/2739 dead transitions. [2021-12-06 19:58:32,709 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 2739 transitions, 77619 flow [2021-12-06 19:58:32,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 19:58:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-06 19:58:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2607 transitions. [2021-12-06 19:58:32,711 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7523809523809524 [2021-12-06 19:58:32,711 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2607 transitions. [2021-12-06 19:58:32,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2607 transitions. [2021-12-06 19:58:32,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:58:32,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2607 transitions. [2021-12-06 19:58:32,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.93333333333333) internal successors, (2607), 45 states have internal predecessors, (2607), 0 states have call successors, (0), 0 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 19:58:32,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 77.0) internal successors, (3542), 46 states have internal predecessors, (3542), 0 states have call successors, (0), 0 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 19:58:32,716 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 77.0) internal successors, (3542), 46 states have internal predecessors, (3542), 0 states have call successors, (0), 0 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 19:58:32,716 INFO L186 Difference]: Start difference. First operand has 638 places, 2295 transitions, 61914 flow. Second operand 45 states and 2607 transitions. [2021-12-06 19:58:32,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 2739 transitions, 77619 flow [2021-12-06 19:58:45,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 2739 transitions, 75662 flow, removed 215 selfloop flow, removed 31 redundant places. [2021-12-06 19:58:45,357 INFO L242 Difference]: Finished difference. Result has 666 places, 2438 transitions, 66686 flow [2021-12-06 19:58:45,358 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=60340, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=66686, PETRI_PLACES=666, PETRI_TRANSITIONS=2438} [2021-12-06 19:58:45,359 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 598 predicate places. [2021-12-06 19:58:45,359 INFO L470 AbstractCegarLoop]: Abstraction has has 666 places, 2438 transitions, 66686 flow [2021-12-06 19:58:45,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 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 19:58:45,359 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:58:45,359 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:45,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 19:58:45,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:58:45,560 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:58:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:45,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1816268871, now seen corresponding path program 16 times [2021-12-06 19:58:45,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:58:45,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760106485] [2021-12-06 19:58:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:45,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:58:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:45,641 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 19:58:45,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:58:45,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760106485] [2021-12-06 19:58:45,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760106485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:58:45,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697557108] [2021-12-06 19:58:45,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:58:45,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:58:45,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:58:45,642 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:58:45,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 19:58:45,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:58:45,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:58:45,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:58:45,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:45,781 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 19:58:45,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:58:45,864 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 19:58:45,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697557108] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:58:45,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:58:45,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2021-12-06 19:58:45,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440990829] [2021-12-06 19:58:45,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:58:45,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 19:58:45,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:58:45,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 19:58:45,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:58:45,866 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:58:45,867 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 2438 transitions, 66686 flow. Second operand has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 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 19:58:45,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:58:45,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:58:45,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:59:06,337 INFO L129 PetriNetUnfolder]: 9033/24951 cut-off events. [2021-12-06 19:59:06,337 INFO L130 PetriNetUnfolder]: For 1173886/1173886 co-relation queries the response was YES. [2021-12-06 19:59:06,860 INFO L84 FinitePrefix]: Finished finitePrefix Result has 235337 conditions, 24951 events. 9033/24951 cut-off events. For 1173886/1173886 co-relation queries the response was YES. Maximal size of possible extension queue 1804. Compared 308322 event pairs, 1077 based on Foata normal form. 4/24724 useless extension candidates. Maximal degree in co-relation 234860. Up to 7844 conditions per place. [2021-12-06 19:59:07,005 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1940 selfloop transitions, 1296 changer transitions 11/3289 dead transitions. [2021-12-06 19:59:07,005 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 3289 transitions, 94651 flow [2021-12-06 19:59:07,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 19:59:07,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-12-06 19:59:07,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4006 transitions. [2021-12-06 19:59:07,009 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7432282003710575 [2021-12-06 19:59:07,009 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4006 transitions. [2021-12-06 19:59:07,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4006 transitions. [2021-12-06 19:59:07,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:59:07,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4006 transitions. [2021-12-06 19:59:07,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 57.22857142857143) internal successors, (4006), 70 states have internal predecessors, (4006), 0 states have call successors, (0), 0 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 19:59:07,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:59:07,017 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:59:07,017 INFO L186 Difference]: Start difference. First operand has 666 places, 2438 transitions, 66686 flow. Second operand 70 states and 4006 transitions. [2021-12-06 19:59:07,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 3289 transitions, 94651 flow [2021-12-06 19:59:25,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 3289 transitions, 94037 flow, removed 187 selfloop flow, removed 12 redundant places. [2021-12-06 19:59:26,044 INFO L242 Difference]: Finished difference. Result has 754 places, 2969 transitions, 85512 flow [2021-12-06 19:59:26,046 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=66202, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=831, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=85512, PETRI_PLACES=754, PETRI_TRANSITIONS=2969} [2021-12-06 19:59:26,047 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 686 predicate places. [2021-12-06 19:59:26,047 INFO L470 AbstractCegarLoop]: Abstraction has has 754 places, 2969 transitions, 85512 flow [2021-12-06 19:59:26,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 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 19:59:26,047 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:59:26,047 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:59:26,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-06 19:59:26,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:59:26,248 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 19:59:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:59:26,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1462038993, now seen corresponding path program 17 times [2021-12-06 19:59:26,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:59:26,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980411378] [2021-12-06 19:59:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:59:26,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:59:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:59:26,298 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 19:59:26,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:59:26,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980411378] [2021-12-06 19:59:26,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980411378] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:59:26,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703454477] [2021-12-06 19:59:26,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:59:26,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:59:26,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:59:26,299 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:59:26,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 19:59:26,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 19:59:26,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:59:26,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:59:26,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:59:26,440 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 19:59:26,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:59:26,517 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 19:59:26,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703454477] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:59:26,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:59:26,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2021-12-06 19:59:26,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23717630] [2021-12-06 19:59:26,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:59:26,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 19:59:26,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:59:26,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 19:59:26,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:59:26,520 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 19:59:26,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 2969 transitions, 85512 flow. Second operand has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 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 19:59:26,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:59:26,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 19:59:26,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:59:52,287 INFO L129 PetriNetUnfolder]: 9375/26060 cut-off events. [2021-12-06 19:59:52,287 INFO L130 PetriNetUnfolder]: For 1390331/1390331 co-relation queries the response was YES. [2021-12-06 19:59:52,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 258164 conditions, 26060 events. 9375/26060 cut-off events. For 1390331/1390331 co-relation queries the response was YES. Maximal size of possible extension queue 1849. Compared 322666 event pairs, 852 based on Foata normal form. 4/25841 useless extension candidates. Maximal degree in co-relation 257750. Up to 6346 conditions per place. [2021-12-06 19:59:53,090 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1731 selfloop transitions, 1549 changer transitions 16/3338 dead transitions. [2021-12-06 19:59:53,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 3338 transitions, 100017 flow [2021-12-06 19:59:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 19:59:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-12-06 19:59:53,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3869 transitions. [2021-12-06 19:59:53,093 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7499515409963171 [2021-12-06 19:59:53,093 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3869 transitions. [2021-12-06 19:59:53,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3869 transitions. [2021-12-06 19:59:53,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:59:53,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3869 transitions. [2021-12-06 19:59:53,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 57.74626865671642) internal successors, (3869), 67 states have internal predecessors, (3869), 0 states have call successors, (0), 0 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 19:59:53,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 77.0) internal successors, (5236), 68 states have internal predecessors, (5236), 0 states have call successors, (0), 0 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 19:59:53,099 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 77.0) internal successors, (5236), 68 states have internal predecessors, (5236), 0 states have call successors, (0), 0 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 19:59:53,099 INFO L186 Difference]: Start difference. First operand has 754 places, 2969 transitions, 85512 flow. Second operand 67 states and 3869 transitions. [2021-12-06 19:59:53,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 3338 transitions, 100017 flow [2021-12-06 20:00:18,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 3338 transitions, 98882 flow, removed 374 selfloop flow, removed 20 redundant places. [2021-12-06 20:00:18,611 INFO L242 Difference]: Finished difference. Result has 822 places, 3127 transitions, 93897 flow [2021-12-06 20:00:18,613 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=84544, PETRI_DIFFERENCE_MINUEND_PLACES=731, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=93897, PETRI_PLACES=822, PETRI_TRANSITIONS=3127} [2021-12-06 20:00:18,614 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 754 predicate places. [2021-12-06 20:00:18,614 INFO L470 AbstractCegarLoop]: Abstraction has has 822 places, 3127 transitions, 93897 flow [2021-12-06 20:00:18,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 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 20:00:18,614 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 20:00:18,614 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:00:18,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 20:00:18,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 20:00:18,815 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 20:00:18,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:00:18,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1014756949, now seen corresponding path program 18 times [2021-12-06 20:00:18,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:00:18,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49881227] [2021-12-06 20:00:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:00:18,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:00:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:18,903 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 20:00:18,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:00:18,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49881227] [2021-12-06 20:00:18,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49881227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:00:18,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129029670] [2021-12-06 20:00:18,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:00:18,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:00:18,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:00:18,904 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:00:18,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 20:00:18,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-06 20:00:18,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:00:18,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:00:18,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:00:19,040 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 20:00:19,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:00:19,110 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 20:00:19,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129029670] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:00:19,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:00:19,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2021-12-06 20:00:19,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207757063] [2021-12-06 20:00:19,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:00:19,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 20:00:19,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:00:19,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 20:00:19,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-12-06 20:00:19,112 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 20:00:19,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 822 places, 3127 transitions, 93897 flow. Second operand has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 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 20:00:19,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 20:00:19,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 20:00:19,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 20:00:48,748 INFO L129 PetriNetUnfolder]: 9907/27925 cut-off events. [2021-12-06 20:00:48,748 INFO L130 PetriNetUnfolder]: For 1647360/1647360 co-relation queries the response was YES. [2021-12-06 20:00:49,615 INFO L84 FinitePrefix]: Finished finitePrefix Result has 285090 conditions, 27925 events. 9907/27925 cut-off events. For 1647360/1647360 co-relation queries the response was YES. Maximal size of possible extension queue 1967. Compared 351322 event pairs, 1470 based on Foata normal form. 9/27671 useless extension candidates. Maximal degree in co-relation 284866. Up to 11761 conditions per place. [2021-12-06 20:00:49,776 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2473 selfloop transitions, 936 changer transitions 12/3463 dead transitions. [2021-12-06 20:00:49,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 3463 transitions, 108666 flow [2021-12-06 20:00:49,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-06 20:00:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-12-06 20:00:49,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3622 transitions. [2021-12-06 20:00:49,779 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7466501752216038 [2021-12-06 20:00:49,779 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3622 transitions. [2021-12-06 20:00:49,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3622 transitions. [2021-12-06 20:00:49,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 20:00:49,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3622 transitions. [2021-12-06 20:00:49,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 57.492063492063494) internal successors, (3622), 63 states have internal predecessors, (3622), 0 states have call successors, (0), 0 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 20:00:49,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 77.0) internal successors, (4928), 64 states have internal predecessors, (4928), 0 states have call successors, (0), 0 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 20:00:49,785 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 77.0) internal successors, (4928), 64 states have internal predecessors, (4928), 0 states have call successors, (0), 0 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 20:00:49,785 INFO L186 Difference]: Start difference. First operand has 822 places, 3127 transitions, 93897 flow. Second operand 63 states and 3622 transitions. [2021-12-06 20:00:49,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 3463 transitions, 108666 flow [2021-12-06 20:01:19,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 853 places, 3463 transitions, 108001 flow, removed 160 selfloop flow, removed 27 redundant places. [2021-12-06 20:01:19,657 INFO L242 Difference]: Finished difference. Result has 871 places, 3298 transitions, 100701 flow [2021-12-06 20:01:19,660 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=93236, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=798, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=100701, PETRI_PLACES=871, PETRI_TRANSITIONS=3298} [2021-12-06 20:01:19,660 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 803 predicate places. [2021-12-06 20:01:19,660 INFO L470 AbstractCegarLoop]: Abstraction has has 871 places, 3298 transitions, 100701 flow [2021-12-06 20:01:19,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 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 20:01:19,661 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 20:01:19,661 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:19,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-06 20:01:19,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 20:01:19,862 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 20:01:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:19,863 INFO L85 PathProgramCache]: Analyzing trace with hash 523862579, now seen corresponding path program 19 times [2021-12-06 20:01:19,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:19,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514730238] [2021-12-06 20:01:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:19,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:19,923 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 20:01:19,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:19,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514730238] [2021-12-06 20:01:19,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514730238] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:01:19,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212210775] [2021-12-06 20:01:19,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:01:19,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:19,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:19,924 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:01:19,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 20:01:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:19,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:01:19,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:20,061 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 20:01:20,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:01:20,129 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 20:01:20,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212210775] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:01:20,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:01:20,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2021-12-06 20:01:20,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692959934] [2021-12-06 20:01:20,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:01:20,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 20:01:20,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:20,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 20:01:20,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-12-06 20:01:20,131 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 20:01:20,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 871 places, 3298 transitions, 100701 flow. Second operand has 21 states, 21 states have (on average 55.904761904761905) internal successors, (1174), 21 states have internal predecessors, (1174), 0 states have call successors, (0), 0 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 20:01:20,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 20:01:20,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 20:01:20,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 20:01:53,144 INFO L129 PetriNetUnfolder]: 10358/29165 cut-off events. [2021-12-06 20:01:53,144 INFO L130 PetriNetUnfolder]: For 2132370/2132370 co-relation queries the response was YES. [2021-12-06 20:01:54,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 309754 conditions, 29165 events. 10358/29165 cut-off events. For 2132370/2132370 co-relation queries the response was YES. Maximal size of possible extension queue 2051. Compared 368862 event pairs, 1183 based on Foata normal form. 106/29005 useless extension candidates. Maximal degree in co-relation 309409. Up to 9821 conditions per place. [2021-12-06 20:01:54,282 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2081 selfloop transitions, 1478 changer transitions 5/3606 dead transitions. [2021-12-06 20:01:54,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 900 places, 3606 transitions, 115192 flow [2021-12-06 20:01:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 20:01:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-06 20:01:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1965 transitions. [2021-12-06 20:01:54,284 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7733175914994097 [2021-12-06 20:01:54,284 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1965 transitions. [2021-12-06 20:01:54,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1965 transitions. [2021-12-06 20:01:54,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 20:01:54,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1965 transitions. [2021-12-06 20:01:54,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 59.54545454545455) internal successors, (1965), 33 states have internal predecessors, (1965), 0 states have call successors, (0), 0 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 20:01:54,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 77.0) internal successors, (2618), 34 states have internal predecessors, (2618), 0 states have call successors, (0), 0 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 20:01:54,288 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 77.0) internal successors, (2618), 34 states have internal predecessors, (2618), 0 states have call successors, (0), 0 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 20:01:54,288 INFO L186 Difference]: Start difference. First operand has 871 places, 3298 transitions, 100701 flow. Second operand 33 states and 1965 transitions. [2021-12-06 20:01:54,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 900 places, 3606 transitions, 115192 flow [2021-12-06 20:02:30,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 897 places, 3606 transitions, 112585 flow, removed 1053 selfloop flow, removed 3 redundant places. [2021-12-06 20:02:30,449 INFO L242 Difference]: Finished difference. Result has 919 places, 3420 transitions, 107966 flow [2021-12-06 20:02:30,452 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=98874, PETRI_DIFFERENCE_MINUEND_PLACES=865, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1882, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=107966, PETRI_PLACES=919, PETRI_TRANSITIONS=3420} [2021-12-06 20:02:30,452 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 851 predicate places. [2021-12-06 20:02:30,452 INFO L470 AbstractCegarLoop]: Abstraction has has 919 places, 3420 transitions, 107966 flow [2021-12-06 20:02:30,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.904761904761905) internal successors, (1174), 21 states have internal predecessors, (1174), 0 states have call successors, (0), 0 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 20:02:30,452 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 20:02:30,452 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:02:30,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 20:02:30,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 20:02:30,653 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 20:02:30,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:02:30,654 INFO L85 PathProgramCache]: Analyzing trace with hash -701734391, now seen corresponding path program 20 times [2021-12-06 20:02:30,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:02:30,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181454075] [2021-12-06 20:02:30,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:02:30,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:02:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:30,701 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 20:02:30,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:02:30,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181454075] [2021-12-06 20:02:30,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181454075] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:02:30,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647258150] [2021-12-06 20:02:30,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:02:30,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:02:30,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:02:30,702 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:02:30,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 20:02:30,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:02:30,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:02:30,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:02:30,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:02:30,838 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 20:02:30,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:02:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:02:30,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647258150] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:02:30,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:02:30,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-12-06 20:02:30,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62931430] [2021-12-06 20:02:30,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:02:30,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 20:02:30,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:02:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 20:02:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-12-06 20:02:30,909 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 20:02:30,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 919 places, 3420 transitions, 107966 flow. Second operand has 19 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:02:30,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 20:02:30,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 20:02:30,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 20:03:08,114 INFO L129 PetriNetUnfolder]: 10968/30802 cut-off events. [2021-12-06 20:03:08,114 INFO L130 PetriNetUnfolder]: For 2479850/2479850 co-relation queries the response was YES. [2021-12-06 20:03:09,175 INFO L84 FinitePrefix]: Finished finitePrefix Result has 340204 conditions, 30802 events. 10968/30802 cut-off events. For 2479850/2479850 co-relation queries the response was YES. Maximal size of possible extension queue 2175. Compared 392698 event pairs, 964 based on Foata normal form. 60/30795 useless extension candidates. Maximal degree in co-relation 339839. Up to 9318 conditions per place. [2021-12-06 20:03:09,367 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2109 selfloop transitions, 1650 changer transitions 12/3813 dead transitions. [2021-12-06 20:03:09,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 964 places, 3813 transitions, 124584 flow [2021-12-06 20:03:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 20:03:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-12-06 20:03:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2725 transitions. [2021-12-06 20:03:09,369 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.769339356295878 [2021-12-06 20:03:09,369 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2725 transitions. [2021-12-06 20:03:09,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2725 transitions. [2021-12-06 20:03:09,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 20:03:09,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2725 transitions. [2021-12-06 20:03:09,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 59.23913043478261) internal successors, (2725), 46 states have internal predecessors, (2725), 0 states have call successors, (0), 0 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 20:03:09,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 77.0) internal successors, (3619), 47 states have internal predecessors, (3619), 0 states have call successors, (0), 0 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 20:03:09,374 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 77.0) internal successors, (3619), 47 states have internal predecessors, (3619), 0 states have call successors, (0), 0 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 20:03:09,374 INFO L186 Difference]: Start difference. First operand has 919 places, 3420 transitions, 107966 flow. Second operand 46 states and 2725 transitions. [2021-12-06 20:03:09,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 964 places, 3813 transitions, 124584 flow [2021-12-06 20:03:52,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 960 places, 3813 transitions, 124342 flow, removed 88 selfloop flow, removed 4 redundant places. [2021-12-06 20:03:52,175 INFO L242 Difference]: Finished difference. Result has 984 places, 3576 transitions, 118955 flow [2021-12-06 20:03:52,178 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=107768, PETRI_DIFFERENCE_MINUEND_PLACES=915, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1511, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=118955, PETRI_PLACES=984, PETRI_TRANSITIONS=3576} [2021-12-06 20:03:52,178 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 916 predicate places. [2021-12-06 20:03:52,178 INFO L470 AbstractCegarLoop]: Abstraction has has 984 places, 3576 transitions, 118955 flow [2021-12-06 20:03:52,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:03:52,178 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 20:03:52,178 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:03:52,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 20:03:52,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 20:03:52,379 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 20:03:52,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:03:52,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2009021095, now seen corresponding path program 21 times [2021-12-06 20:03:52,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:03:52,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535356518] [2021-12-06 20:03:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:03:52,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:03:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:03:52,431 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 20:03:52,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:03:52,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535356518] [2021-12-06 20:03:52,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535356518] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:03:52,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125440829] [2021-12-06 20:03:52,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:03:52,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:03:52,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:03:52,432 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:03:52,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 20:03:52,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 20:03:52,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:03:52,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:03:52,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:03:52,574 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 20:03:52,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:03:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:03:52,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125440829] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:03:52,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:03:52,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-12-06 20:03:52,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630164890] [2021-12-06 20:03:52,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:03:52,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 20:03:52,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:03:52,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 20:03:52,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-12-06 20:03:52,634 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 20:03:52,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 984 places, 3576 transitions, 118955 flow. Second operand has 19 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:03:52,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 20:03:52,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 20:03:52,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 20:04:38,267 INFO L129 PetriNetUnfolder]: 12031/33380 cut-off events. [2021-12-06 20:04:38,267 INFO L130 PetriNetUnfolder]: For 3140159/3140159 co-relation queries the response was YES. [2021-12-06 20:04:39,607 INFO L84 FinitePrefix]: Finished finitePrefix Result has 392520 conditions, 33380 events. 12031/33380 cut-off events. For 3140159/3140159 co-relation queries the response was YES. Maximal size of possible extension queue 2304. Compared 426713 event pairs, 1318 based on Foata normal form. 62/33172 useless extension candidates. Maximal degree in co-relation 392131. Up to 10661 conditions per place. [2021-12-06 20:04:39,835 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2207 selfloop transitions, 1838 changer transitions 10/4097 dead transitions. [2021-12-06 20:04:39,835 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1033 places, 4097 transitions, 141372 flow [2021-12-06 20:04:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 20:04:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-12-06 20:04:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2988 transitions. [2021-12-06 20:04:39,837 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7608861726508785 [2021-12-06 20:04:39,837 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2988 transitions. [2021-12-06 20:04:39,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2988 transitions. [2021-12-06 20:04:39,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 20:04:39,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2988 transitions. [2021-12-06 20:04:39,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 58.588235294117645) internal successors, (2988), 51 states have internal predecessors, (2988), 0 states have call successors, (0), 0 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 20:04:39,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 77.0) internal successors, (4004), 52 states have internal predecessors, (4004), 0 states have call successors, (0), 0 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 20:04:39,842 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 77.0) internal successors, (4004), 52 states have internal predecessors, (4004), 0 states have call successors, (0), 0 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 20:04:39,842 INFO L186 Difference]: Start difference. First operand has 984 places, 3576 transitions, 118955 flow. Second operand 51 states and 2988 transitions. [2021-12-06 20:04:39,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1033 places, 4097 transitions, 141372 flow [2021-12-06 20:05:36,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1024 places, 4097 transitions, 140683 flow, removed 143 selfloop flow, removed 9 redundant places. [2021-12-06 20:05:36,457 INFO L242 Difference]: Finished difference. Result has 1050 places, 3872 transitions, 135194 flow [2021-12-06 20:05:36,459 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=118328, PETRI_DIFFERENCE_MINUEND_PLACES=974, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1948, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=135194, PETRI_PLACES=1050, PETRI_TRANSITIONS=3872} [2021-12-06 20:05:36,460 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 982 predicate places. [2021-12-06 20:05:36,460 INFO L470 AbstractCegarLoop]: Abstraction has has 1050 places, 3872 transitions, 135194 flow [2021-12-06 20:05:36,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:05:36,460 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 20:05:36,460 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:05:36,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 20:05:36,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 20:05:36,661 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 20:05:36,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:05:36,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1745473187, now seen corresponding path program 22 times [2021-12-06 20:05:36,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:05:36,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285456023] [2021-12-06 20:05:36,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:05:36,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:05:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:05:36,717 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 20:05:36,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:05:36,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285456023] [2021-12-06 20:05:36,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285456023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:05:36,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768721780] [2021-12-06 20:05:36,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:05:36,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:05:36,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:05:36,718 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:05:36,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 20:05:36,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:05:36,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:05:36,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:05:36,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:05:36,861 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 20:05:36,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:05:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:05:36,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768721780] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:05:36,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:05:36,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-12-06 20:05:36,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041204662] [2021-12-06 20:05:36,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:05:36,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 20:05:36,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:05:36,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 20:05:36,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-12-06 20:05:36,920 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 20:05:36,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1050 places, 3872 transitions, 135194 flow. Second operand has 19 states, 19 states have (on average 55.89473684210526) internal successors, (1062), 19 states have internal predecessors, (1062), 0 states have call successors, (0), 0 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 20:05:36,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 20:05:36,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 20:05:36,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 20:06:33,128 INFO L129 PetriNetUnfolder]: 13269/36573 cut-off events. [2021-12-06 20:06:33,128 INFO L130 PetriNetUnfolder]: For 3878537/3878537 co-relation queries the response was YES. [2021-12-06 20:06:34,920 INFO L84 FinitePrefix]: Finished finitePrefix Result has 455109 conditions, 36573 events. 13269/36573 cut-off events. For 3878537/3878537 co-relation queries the response was YES. Maximal size of possible extension queue 2502. Compared 472333 event pairs, 1496 based on Foata normal form. 30/36288 useless extension candidates. Maximal degree in co-relation 454697. Up to 12185 conditions per place. [2021-12-06 20:06:35,184 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2414 selfloop transitions, 1958 changer transitions 15/4429 dead transitions. [2021-12-06 20:06:35,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1087 places, 4429 transitions, 162133 flow [2021-12-06 20:06:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 20:06:35,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-06 20:06:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2213 transitions. [2021-12-06 20:06:35,186 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7563226247436774 [2021-12-06 20:06:35,186 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2213 transitions. [2021-12-06 20:06:35,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2213 transitions. [2021-12-06 20:06:35,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 20:06:35,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2213 transitions. [2021-12-06 20:06:35,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 58.23684210526316) internal successors, (2213), 38 states have internal predecessors, (2213), 0 states have call successors, (0), 0 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 20:06:35,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 77.0) internal successors, (3003), 39 states have internal predecessors, (3003), 0 states have call successors, (0), 0 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 20:06:35,190 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 77.0) internal successors, (3003), 39 states have internal predecessors, (3003), 0 states have call successors, (0), 0 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 20:06:35,190 INFO L186 Difference]: Start difference. First operand has 1050 places, 3872 transitions, 135194 flow. Second operand 38 states and 2213 transitions. [2021-12-06 20:06:35,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1087 places, 4429 transitions, 162133 flow [2021-12-06 20:07:52,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1083 places, 4429 transitions, 160943 flow, removed 467 selfloop flow, removed 4 redundant places. [2021-12-06 20:07:52,319 INFO L242 Difference]: Finished difference. Result has 1103 places, 4224 transitions, 155977 flow [2021-12-06 20:07:52,321 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=134334, PETRI_DIFFERENCE_MINUEND_PLACES=1046, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2075, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=155977, PETRI_PLACES=1103, PETRI_TRANSITIONS=4224} [2021-12-06 20:07:52,322 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1035 predicate places. [2021-12-06 20:07:52,322 INFO L470 AbstractCegarLoop]: Abstraction has has 1103 places, 4224 transitions, 155977 flow [2021-12-06 20:07:52,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.89473684210526) internal successors, (1062), 19 states have internal predecessors, (1062), 0 states have call successors, (0), 0 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 20:07:52,322 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 20:07:52,323 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:07:52,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 20:07:52,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 20:07:52,523 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 20:07:52,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:07:52,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1552593637, now seen corresponding path program 23 times [2021-12-06 20:07:52,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:07:52,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248492398] [2021-12-06 20:07:52,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:07:52,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:07:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:07:52,597 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 20:07:52,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:07:52,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248492398] [2021-12-06 20:07:52,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248492398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:07:52,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57728631] [2021-12-06 20:07:52,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:07:52,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:07:52,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:07:52,598 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:07:52,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cf109f4-4624-4d15-b1b8-88bdaad5a3e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 20:07:52,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-06 20:07:52,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:07:52,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:07:52,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:07:52,748 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 20:07:52,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:07:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:07:52,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57728631] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:07:52,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:07:52,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-12-06 20:07:52,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141874891] [2021-12-06 20:07:52,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:07:52,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 20:07:52,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:07:52,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 20:07:52,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-06 20:07:52,815 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-12-06 20:07:52,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1103 places, 4224 transitions, 155977 flow. Second operand has 19 states, 19 states have (on average 55.89473684210526) internal successors, (1062), 19 states have internal predecessors, (1062), 0 states have call successors, (0), 0 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 20:07:52,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 20:07:52,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-12-06 20:07:52,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 20:08:54,792 INFO L129 PetriNetUnfolder]: 13574/37410 cut-off events. [2021-12-06 20:08:54,792 INFO L130 PetriNetUnfolder]: For 4554784/4554784 co-relation queries the response was YES. [2021-12-06 20:08:56,681 INFO L84 FinitePrefix]: Finished finitePrefix Result has 487640 conditions, 37410 events. 13574/37410 cut-off events. For 4554784/4554784 co-relation queries the response was YES. Maximal size of possible extension queue 2580. Compared 484165 event pairs, 1125 based on Foata normal form. 60/37382 useless extension candidates. Maximal degree in co-relation 487272. Up to 9760 conditions per place. [2021-12-06 20:08:56,961 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2165 selfloop transitions, 2271 changer transitions 18/4496 dead transitions. [2021-12-06 20:08:56,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1146 places, 4496 transitions, 172864 flow [2021-12-06 20:08:56,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 20:08:56,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-12-06 20:08:56,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2846 transitions. [2021-12-06 20:08:56,963 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7543069175722237 [2021-12-06 20:08:56,963 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2846 transitions. [2021-12-06 20:08:56,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2846 transitions. [2021-12-06 20:08:56,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 20:08:56,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2846 transitions. [2021-12-06 20:08:56,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 58.08163265306123) internal successors, (2846), 49 states have internal predecessors, (2846), 0 states have call successors, (0), 0 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 20:08:56,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 77.0) internal successors, (3850), 50 states have internal predecessors, (3850), 0 states have call successors, (0), 0 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 20:08:56,968 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 77.0) internal successors, (3850), 50 states have internal predecessors, (3850), 0 states have call successors, (0), 0 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 20:08:56,968 INFO L186 Difference]: Start difference. First operand has 1103 places, 4224 transitions, 155977 flow. Second operand 49 states and 2846 transitions. [2021-12-06 20:08:56,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1146 places, 4496 transitions, 172864 flow