./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF --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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:59:13,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:59:13,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:59:13,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:59:13,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:59:13,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:59:13,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:59:13,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:59:13,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:59:13,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:59:13,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:59:13,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:59:13,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:59:13,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:59:13,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:59:13,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:59:13,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:59:13,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:59:13,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:59:13,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:59:13,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:59:13,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:59:13,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:59:13,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:59:13,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:59:13,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:59:13,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:59:13,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:59:13,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:59:13,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:59:13,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:59:13,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:59:13,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:59:13,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:59:13,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:59:13,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:59:13,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:59:13,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:59:13,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:59:13,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:59:13,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:59:13,783 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:59:13,840 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:59:13,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:59:13,841 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:59:13,842 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:59:13,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:59:13,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:59:13,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:59:13,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:59:13,845 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:59:13,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:59:13,847 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:59:13,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:59:13,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:59:13,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:59:13,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:59:13,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:59:13,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:59:13,849 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:59:13,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:59:13,850 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:59:13,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:59:13,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:59:13,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:59:13,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:59:13,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:59:13,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:59:13,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:59:13,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:59:13,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:59:13,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:59:13,855 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:59:13,855 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:59:13,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:59:13,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:59:13,856 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_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2021-11-20 05:59:14,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:59:14,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:59:14,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:59:14,267 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:59:14,268 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:59:14,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2021-11-20 05:59:14,355 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/data/b601b5077/f947e150ecb8454dabefb33cedb08ca6/FLAG948aba9b3 [2021-11-20 05:59:15,025 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:59:15,025 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2021-11-20 05:59:15,043 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/data/b601b5077/f947e150ecb8454dabefb33cedb08ca6/FLAG948aba9b3 [2021-11-20 05:59:15,356 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/data/b601b5077/f947e150ecb8454dabefb33cedb08ca6 [2021-11-20 05:59:15,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:59:15,360 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:59:15,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:59:15,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:59:15,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:59:15,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:59:15" (1/1) ... [2021-11-20 05:59:15,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a9f0b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:59:15, skipping insertion in model container [2021-11-20 05:59:15,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:59:15" (1/1) ... [2021-11-20 05:59:15,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:59:15,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:59:15,681 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_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2021-11-20 05:59:15,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:59:15,708 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:59:15,734 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_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2021-11-20 05:59:15,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:59:15,765 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:59:15,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:59:15 WrapperNode [2021-11-20 05:59:15,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:59:15,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:59:15,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:59:15,767 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:59:15,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:59:15" (1/1) ... [2021-11-20 05:59:15,806 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:59:15" (1/1) ... [2021-11-20 05:59:15,845 INFO L137 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 112 [2021-11-20 05:59:15,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:59:15,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:59:15,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:59:15,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:59:15,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:59:15" (1/1) ... [2021-11-20 05:59:15,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:59:15" (1/1) ... [2021-11-20 05:59:15,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:59:15" (1/1) ... [2021-11-20 05:59:15,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:59:15" (1/1) ... [2021-11-20 05:59:15,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:59:15" (1/1) ... [2021-11-20 05:59:15,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:59:15" (1/1) ... [2021-11-20 05:59:15,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:59:15" (1/1) ... [2021-11-20 05:59:15,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:59:15,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:59:15,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:59:15,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:59:15,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:59:15" (1/1) ... [2021-11-20 05:59:15,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:59:15,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:59:15,983 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:59:16,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:59:16,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:59:16,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-20 05:59:16,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-20 05:59:16,047 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-20 05:59:16,047 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-20 05:59:16,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:59:16,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:59:16,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:59:16,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:59:16,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:59:16,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:59:16,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:59:16,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:59:16,051 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-20 05:59:16,179 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:59:16,181 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:59:16,613 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:59:16,626 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:59:16,641 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 05:59:16,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:59:16 BoogieIcfgContainer [2021-11-20 05:59:16,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:59:16,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:59:16,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:59:16,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:59:16,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:59:15" (1/3) ... [2021-11-20 05:59:16,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fb5bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:59:16, skipping insertion in model container [2021-11-20 05:59:16,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:59:15" (2/3) ... [2021-11-20 05:59:16,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fb5bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:59:16, skipping insertion in model container [2021-11-20 05:59:16,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:59:16" (3/3) ... [2021-11-20 05:59:16,657 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2021-11-20 05:59:16,664 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 05:59:16,664 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:59:16,664 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:59:16,665 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 05:59:16,739 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,740 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,740 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,740 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,740 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,741 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,741 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,741 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,742 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,742 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,742 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,742 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,742 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,745 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,745 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,745 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,746 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,746 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,747 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,748 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,748 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,748 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,748 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,749 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,749 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,750 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,750 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,750 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,751 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,751 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,751 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,751 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,752 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,752 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,752 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,752 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,753 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,754 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,754 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,754 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,754 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,755 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,755 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,755 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,756 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,756 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,756 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,756 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,757 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,757 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,757 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,758 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,758 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,758 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,758 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,758 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,788 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,788 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,789 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,789 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,789 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,793 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,793 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,793 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,793 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,794 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:59:16,797 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-20 05:59:16,870 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:59:16,885 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:59:16,886 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 05:59:16,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 166 places, 174 transitions, 364 flow [2021-11-20 05:59:17,063 INFO L129 PetriNetUnfolder]: 15/172 cut-off events. [2021-11-20 05:59:17,064 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 05:59:17,070 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 15/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 131. Up to 3 conditions per place. [2021-11-20 05:59:17,071 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 174 transitions, 364 flow [2021-11-20 05:59:17,085 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 163 transitions, 338 flow [2021-11-20 05:59:17,152 INFO L129 PetriNetUnfolder]: 15/162 cut-off events. [2021-11-20 05:59:17,152 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 05:59:17,153 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:59:17,154 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:17,154 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:59:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1906392923, now seen corresponding path program 1 times [2021-11-20 05:59:17,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:17,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410472621] [2021-11-20 05:59:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:17,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:59:17,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:17,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410472621] [2021-11-20 05:59:17,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410472621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:59:17,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:59:17,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:59:17,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000251470] [2021-11-20 05:59:17,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:59:17,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:59:17,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:17,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:59:17,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:59:17,628 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 174 [2021-11-20 05:59:17,633 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 163 transitions, 338 flow. Second operand has 2 states, 2 states have (on average 162.5) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:17,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:59:17,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 174 [2021-11-20 05:59:17,636 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:59:17,687 INFO L129 PetriNetUnfolder]: 6/154 cut-off events. [2021-11-20 05:59:17,687 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-11-20 05:59:17,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 154 events. 6/154 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 111 event pairs, 0 based on Foata normal form. 11/154 useless extension candidates. Maximal degree in co-relation 125. Up to 5 conditions per place. [2021-11-20 05:59:17,691 INFO L132 encePairwiseOnDemand]: 165/174 looper letters, 4 selfloop transitions, 0 changer transitions 5/154 dead transitions. [2021-11-20 05:59:17,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 154 transitions, 328 flow [2021-11-20 05:59:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:59:17,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-20 05:59:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 333 transitions. [2021-11-20 05:59:17,710 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9568965517241379 [2021-11-20 05:59:17,711 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 333 transitions. [2021-11-20 05:59:17,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 333 transitions. [2021-11-20 05:59:17,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:59:17,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 333 transitions. [2021-11-20 05:59:17,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 166.5) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:17,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:17,731 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:17,734 INFO L186 Difference]: Start difference. First operand has 155 places, 163 transitions, 338 flow. Second operand 2 states and 333 transitions. [2021-11-20 05:59:17,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 154 transitions, 328 flow [2021-11-20 05:59:17,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 154 transitions, 320 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-20 05:59:17,746 INFO L242 Difference]: Finished difference. Result has 152 places, 149 transitions, 302 flow [2021-11-20 05:59:17,749 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=302, PETRI_PLACES=152, PETRI_TRANSITIONS=149} [2021-11-20 05:59:17,754 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, -3 predicate places. [2021-11-20 05:59:17,754 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 149 transitions, 302 flow [2021-11-20 05:59:17,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 162.5) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:17,755 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:59:17,755 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:17,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:59:17,756 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:59:17,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:17,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2116646914, now seen corresponding path program 1 times [2021-11-20 05:59:17,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:17,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241848599] [2021-11-20 05:59:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:17,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:59:18,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:18,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241848599] [2021-11-20 05:59:18,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241848599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:59:18,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:59:18,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 05:59:18,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115321969] [2021-11-20 05:59:18,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:59:18,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:59:18,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:18,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:59:18,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:59:18,300 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 174 [2021-11-20 05:59:18,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 149 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:18,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:59:18,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 174 [2021-11-20 05:59:18,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:59:18,747 INFO L129 PetriNetUnfolder]: 171/632 cut-off events. [2021-11-20 05:59:18,747 INFO L130 PetriNetUnfolder]: For 22/35 co-relation queries the response was YES. [2021-11-20 05:59:18,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 964 conditions, 632 events. 171/632 cut-off events. For 22/35 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3069 event pairs, 41 based on Foata normal form. 1/552 useless extension candidates. Maximal degree in co-relation 961. Up to 122 conditions per place. [2021-11-20 05:59:18,760 INFO L132 encePairwiseOnDemand]: 167/174 looper letters, 65 selfloop transitions, 5 changer transitions 4/185 dead transitions. [2021-11-20 05:59:18,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 185 transitions, 527 flow [2021-11-20 05:59:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:59:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 05:59:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 801 transitions. [2021-11-20 05:59:18,772 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7672413793103449 [2021-11-20 05:59:18,772 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 801 transitions. [2021-11-20 05:59:18,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 801 transitions. [2021-11-20 05:59:18,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:59:18,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 801 transitions. [2021-11-20 05:59:18,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.5) internal successors, (801), 6 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:18,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:18,787 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:18,787 INFO L186 Difference]: Start difference. First operand has 152 places, 149 transitions, 302 flow. Second operand 6 states and 801 transitions. [2021-11-20 05:59:18,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 185 transitions, 527 flow [2021-11-20 05:59:18,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 185 transitions, 527 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 05:59:18,824 INFO L242 Difference]: Finished difference. Result has 155 places, 152 transitions, 331 flow [2021-11-20 05:59:18,824 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=155, PETRI_TRANSITIONS=152} [2021-11-20 05:59:18,826 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 0 predicate places. [2021-11-20 05:59:18,826 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 152 transitions, 331 flow [2021-11-20 05:59:18,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:18,827 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:59:18,828 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:18,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:59:18,829 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:59:18,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:18,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1543221727, now seen corresponding path program 1 times [2021-11-20 05:59:18,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:18,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309806626] [2021-11-20 05:59:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:18,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:59:19,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:19,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309806626] [2021-11-20 05:59:19,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309806626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:59:19,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:59:19,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:59:19,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402795852] [2021-11-20 05:59:19,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:59:19,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:59:19,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:19,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:59:19,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:59:19,158 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2021-11-20 05:59:19,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 152 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:19,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:59:19,164 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2021-11-20 05:59:19,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:59:19,558 INFO L129 PetriNetUnfolder]: 120/694 cut-off events. [2021-11-20 05:59:19,559 INFO L130 PetriNetUnfolder]: For 28/38 co-relation queries the response was YES. [2021-11-20 05:59:19,562 INFO L84 FinitePrefix]: Finished finitePrefix Result has 998 conditions, 694 events. 120/694 cut-off events. For 28/38 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3411 event pairs, 38 based on Foata normal form. 0/607 useless extension candidates. Maximal degree in co-relation 991. Up to 86 conditions per place. [2021-11-20 05:59:19,568 INFO L132 encePairwiseOnDemand]: 162/174 looper letters, 64 selfloop transitions, 14 changer transitions 0/188 dead transitions. [2021-11-20 05:59:19,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 188 transitions, 570 flow [2021-11-20 05:59:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:59:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-20 05:59:19,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1318 transitions. [2021-11-20 05:59:19,576 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7574712643678161 [2021-11-20 05:59:19,576 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1318 transitions. [2021-11-20 05:59:19,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1318 transitions. [2021-11-20 05:59:19,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:59:19,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1318 transitions. [2021-11-20 05:59:19,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.8) internal successors, (1318), 10 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:19,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:19,593 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:19,593 INFO L186 Difference]: Start difference. First operand has 155 places, 152 transitions, 331 flow. Second operand 10 states and 1318 transitions. [2021-11-20 05:59:19,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 188 transitions, 570 flow [2021-11-20 05:59:19,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 188 transitions, 566 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-11-20 05:59:19,607 INFO L242 Difference]: Finished difference. Result has 162 places, 156 transitions, 375 flow [2021-11-20 05:59:19,608 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=375, PETRI_PLACES=162, PETRI_TRANSITIONS=156} [2021-11-20 05:59:19,611 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 7 predicate places. [2021-11-20 05:59:19,612 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 156 transitions, 375 flow [2021-11-20 05:59:19,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:19,613 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:59:19,613 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:19,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 05:59:19,614 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:59:19,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:19,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1522524733, now seen corresponding path program 1 times [2021-11-20 05:59:19,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:19,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809294646] [2021-11-20 05:59:19,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:19,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:59:19,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:19,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809294646] [2021-11-20 05:59:19,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809294646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:59:19,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:59:19,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:59:19,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540953620] [2021-11-20 05:59:19,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:59:19,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:59:19,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:19,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:59:19,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:59:19,910 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2021-11-20 05:59:19,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 156 transitions, 375 flow. Second operand has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:19,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:59:19,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2021-11-20 05:59:19,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:59:20,231 INFO L129 PetriNetUnfolder]: 106/574 cut-off events. [2021-11-20 05:59:20,231 INFO L130 PetriNetUnfolder]: For 77/86 co-relation queries the response was YES. [2021-11-20 05:59:20,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 574 events. 106/574 cut-off events. For 77/86 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2430 event pairs, 37 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 897. Up to 97 conditions per place. [2021-11-20 05:59:20,237 INFO L132 encePairwiseOnDemand]: 162/174 looper letters, 45 selfloop transitions, 11 changer transitions 19/186 dead transitions. [2021-11-20 05:59:20,238 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 186 transitions, 597 flow [2021-11-20 05:59:20,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:59:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-20 05:59:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1315 transitions. [2021-11-20 05:59:20,245 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7557471264367817 [2021-11-20 05:59:20,245 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1315 transitions. [2021-11-20 05:59:20,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1315 transitions. [2021-11-20 05:59:20,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:59:20,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1315 transitions. [2021-11-20 05:59:20,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.5) internal successors, (1315), 10 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:20,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:20,264 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:20,281 INFO L186 Difference]: Start difference. First operand has 162 places, 156 transitions, 375 flow. Second operand 10 states and 1315 transitions. [2021-11-20 05:59:20,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 186 transitions, 597 flow [2021-11-20 05:59:20,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 186 transitions, 589 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-11-20 05:59:20,289 INFO L242 Difference]: Finished difference. Result has 170 places, 154 transitions, 393 flow [2021-11-20 05:59:20,290 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=393, PETRI_PLACES=170, PETRI_TRANSITIONS=154} [2021-11-20 05:59:20,291 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 15 predicate places. [2021-11-20 05:59:20,291 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 154 transitions, 393 flow [2021-11-20 05:59:20,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:20,292 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:59:20,293 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:20,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:59:20,293 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:59:20,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:20,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1897785128, now seen corresponding path program 1 times [2021-11-20 05:59:20,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:20,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322718296] [2021-11-20 05:59:20,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:20,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:59:20,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:20,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322718296] [2021-11-20 05:59:20,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322718296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:59:20,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:59:20,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:59:20,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124309332] [2021-11-20 05:59:20,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:59:20,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:59:20,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:20,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:59:20,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:59:20,481 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2021-11-20 05:59:20,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 154 transitions, 393 flow. Second operand has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:20,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:59:20,483 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2021-11-20 05:59:20,484 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:59:20,793 INFO L129 PetriNetUnfolder]: 121/711 cut-off events. [2021-11-20 05:59:20,793 INFO L130 PetriNetUnfolder]: For 141/151 co-relation queries the response was YES. [2021-11-20 05:59:20,796 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1125 conditions, 711 events. 121/711 cut-off events. For 141/151 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3685 event pairs, 38 based on Foata normal form. 6/675 useless extension candidates. Maximal degree in co-relation 1115. Up to 94 conditions per place. [2021-11-20 05:59:20,801 INFO L132 encePairwiseOnDemand]: 164/174 looper letters, 57 selfloop transitions, 10 changer transitions 0/178 dead transitions. [2021-11-20 05:59:20,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 178 transitions, 592 flow [2021-11-20 05:59:20,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:59:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-20 05:59:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1058 transitions. [2021-11-20 05:59:20,807 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7600574712643678 [2021-11-20 05:59:20,807 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1058 transitions. [2021-11-20 05:59:20,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1058 transitions. [2021-11-20 05:59:20,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:59:20,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1058 transitions. [2021-11-20 05:59:20,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.25) internal successors, (1058), 8 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:20,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:20,819 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:20,819 INFO L186 Difference]: Start difference. First operand has 170 places, 154 transitions, 393 flow. Second operand 8 states and 1058 transitions. [2021-11-20 05:59:20,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 178 transitions, 592 flow [2021-11-20 05:59:20,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 178 transitions, 557 flow, removed 5 selfloop flow, removed 10 redundant places. [2021-11-20 05:59:20,830 INFO L242 Difference]: Finished difference. Result has 165 places, 156 transitions, 398 flow [2021-11-20 05:59:20,834 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=398, PETRI_PLACES=165, PETRI_TRANSITIONS=156} [2021-11-20 05:59:20,838 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 10 predicate places. [2021-11-20 05:59:20,838 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 156 transitions, 398 flow [2021-11-20 05:59:20,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:20,839 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:59:20,839 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:20,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 05:59:20,840 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:59:20,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:20,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1055001396, now seen corresponding path program 1 times [2021-11-20 05:59:20,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:20,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052688210] [2021-11-20 05:59:20,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:20,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:59:21,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:21,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052688210] [2021-11-20 05:59:21,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052688210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:59:21,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:59:21,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:59:21,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177982217] [2021-11-20 05:59:21,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:59:21,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:59:21,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:21,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:59:21,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:59:21,033 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2021-11-20 05:59:21,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 156 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:21,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:59:21,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2021-11-20 05:59:21,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:59:21,277 INFO L129 PetriNetUnfolder]: 105/546 cut-off events. [2021-11-20 05:59:21,277 INFO L130 PetriNetUnfolder]: For 101/110 co-relation queries the response was YES. [2021-11-20 05:59:21,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 894 conditions, 546 events. 105/546 cut-off events. For 101/110 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2352 event pairs, 37 based on Foata normal form. 0/494 useless extension candidates. Maximal degree in co-relation 884. Up to 97 conditions per place. [2021-11-20 05:59:21,283 INFO L132 encePairwiseOnDemand]: 164/174 looper letters, 48 selfloop transitions, 9 changer transitions 7/175 dead transitions. [2021-11-20 05:59:21,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 175 transitions, 574 flow [2021-11-20 05:59:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:59:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-20 05:59:21,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1055 transitions. [2021-11-20 05:59:21,289 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7579022988505747 [2021-11-20 05:59:21,290 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1055 transitions. [2021-11-20 05:59:21,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1055 transitions. [2021-11-20 05:59:21,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:59:21,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1055 transitions. [2021-11-20 05:59:21,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 131.875) internal successors, (1055), 8 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:21,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:21,301 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:21,301 INFO L186 Difference]: Start difference. First operand has 165 places, 156 transitions, 398 flow. Second operand 8 states and 1055 transitions. [2021-11-20 05:59:21,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 175 transitions, 574 flow [2021-11-20 05:59:21,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 175 transitions, 556 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-11-20 05:59:21,313 INFO L242 Difference]: Finished difference. Result has 168 places, 155 transitions, 394 flow [2021-11-20 05:59:21,313 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=394, PETRI_PLACES=168, PETRI_TRANSITIONS=155} [2021-11-20 05:59:21,317 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 13 predicate places. [2021-11-20 05:59:21,317 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 155 transitions, 394 flow [2021-11-20 05:59:21,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:21,319 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:59:21,319 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:21,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 05:59:21,319 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:59:21,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:21,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1703942293, now seen corresponding path program 1 times [2021-11-20 05:59:21,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:21,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237910596] [2021-11-20 05:59:21,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:21,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:59:21,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:21,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237910596] [2021-11-20 05:59:21,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237910596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:59:21,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189152577] [2021-11-20 05:59:21,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:21,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:21,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:59:21,717 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:59:21,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:59:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:21,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:59:21,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:59:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:59:23,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:59:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:59:24,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189152577] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:59:24,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:59:24,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 30 [2021-11-20 05:59:24,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740586727] [2021-11-20 05:59:24,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:59:24,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:59:24,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:24,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:59:24,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-11-20 05:59:24,380 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 174 [2021-11-20 05:59:24,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 155 transitions, 394 flow. Second operand has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:24,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:59:24,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 174 [2021-11-20 05:59:24,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:59:24,951 INFO L129 PetriNetUnfolder]: 81/524 cut-off events. [2021-11-20 05:59:24,951 INFO L130 PetriNetUnfolder]: For 126/133 co-relation queries the response was YES. [2021-11-20 05:59:24,953 INFO L84 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 524 events. 81/524 cut-off events. For 126/133 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2305 event pairs, 28 based on Foata normal form. 7/499 useless extension candidates. Maximal degree in co-relation 857. Up to 80 conditions per place. [2021-11-20 05:59:24,957 INFO L132 encePairwiseOnDemand]: 160/174 looper letters, 47 selfloop transitions, 15 changer transitions 0/171 dead transitions. [2021-11-20 05:59:24,957 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 171 transitions, 564 flow [2021-11-20 05:59:24,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:59:24,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-20 05:59:24,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1768 transitions. [2021-11-20 05:59:24,965 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7257799671592775 [2021-11-20 05:59:24,966 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1768 transitions. [2021-11-20 05:59:24,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1768 transitions. [2021-11-20 05:59:24,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:59:24,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1768 transitions. [2021-11-20 05:59:24,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.28571428571429) internal successors, (1768), 14 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:24,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:24,984 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:24,985 INFO L186 Difference]: Start difference. First operand has 168 places, 155 transitions, 394 flow. Second operand 14 states and 1768 transitions. [2021-11-20 05:59:24,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 171 transitions, 564 flow [2021-11-20 05:59:24,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 171 transitions, 534 flow, removed 5 selfloop flow, removed 8 redundant places. [2021-11-20 05:59:24,992 INFO L242 Difference]: Finished difference. Result has 175 places, 158 transitions, 426 flow [2021-11-20 05:59:24,993 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=426, PETRI_PLACES=175, PETRI_TRANSITIONS=158} [2021-11-20 05:59:24,993 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 20 predicate places. [2021-11-20 05:59:24,994 INFO L470 AbstractCegarLoop]: Abstraction has has 175 places, 158 transitions, 426 flow [2021-11-20 05:59:24,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:24,995 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:59:24,995 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:25,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:59:25,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:25,221 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:59:25,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:25,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2100548871, now seen corresponding path program 1 times [2021-11-20 05:59:25,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:25,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119880419] [2021-11-20 05:59:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:25,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:59:25,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:25,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119880419] [2021-11-20 05:59:25,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119880419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:59:25,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480814906] [2021-11-20 05:59:25,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:25,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:25,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:59:25,513 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:59:25,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:59:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:25,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:59:25,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:59:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:59:26,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:59:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:59:27,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480814906] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:59:27,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:59:27,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 30 [2021-11-20 05:59:27,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76547646] [2021-11-20 05:59:27,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:59:27,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:59:27,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:27,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:59:27,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-11-20 05:59:27,524 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 174 [2021-11-20 05:59:27,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 158 transitions, 426 flow. Second operand has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:27,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:59:27,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 174 [2021-11-20 05:59:27,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:59:28,067 INFO L129 PetriNetUnfolder]: 64/579 cut-off events. [2021-11-20 05:59:28,067 INFO L130 PetriNetUnfolder]: For 205/206 co-relation queries the response was YES. [2021-11-20 05:59:28,070 INFO L84 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 579 events. 64/579 cut-off events. For 205/206 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2857 event pairs, 23 based on Foata normal form. 1/540 useless extension candidates. Maximal degree in co-relation 932. Up to 62 conditions per place. [2021-11-20 05:59:28,074 INFO L132 encePairwiseOnDemand]: 160/174 looper letters, 52 selfloop transitions, 15 changer transitions 0/176 dead transitions. [2021-11-20 05:59:28,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 176 transitions, 620 flow [2021-11-20 05:59:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:59:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-20 05:59:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1770 transitions. [2021-11-20 05:59:28,083 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7266009852216748 [2021-11-20 05:59:28,083 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1770 transitions. [2021-11-20 05:59:28,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1770 transitions. [2021-11-20 05:59:28,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:59:28,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1770 transitions. [2021-11-20 05:59:28,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.42857142857143) internal successors, (1770), 14 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:28,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:28,102 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:28,103 INFO L186 Difference]: Start difference. First operand has 175 places, 158 transitions, 426 flow. Second operand 14 states and 1770 transitions. [2021-11-20 05:59:28,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 176 transitions, 620 flow [2021-11-20 05:59:28,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 176 transitions, 597 flow, removed 1 selfloop flow, removed 8 redundant places. [2021-11-20 05:59:28,110 INFO L242 Difference]: Finished difference. Result has 182 places, 159 transitions, 447 flow [2021-11-20 05:59:28,111 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=447, PETRI_PLACES=182, PETRI_TRANSITIONS=159} [2021-11-20 05:59:28,113 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 27 predicate places. [2021-11-20 05:59:28,114 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 159 transitions, 447 flow [2021-11-20 05:59:28,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:28,115 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:59:28,115 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:28,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 05:59:28,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:28,337 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:59:28,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:28,338 INFO L85 PathProgramCache]: Analyzing trace with hash 864077398, now seen corresponding path program 1 times [2021-11-20 05:59:28,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:28,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943700565] [2021-11-20 05:59:28,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:28,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:59:29,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943700565] [2021-11-20 05:59:29,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943700565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:59:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689899368] [2021-11-20 05:59:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:29,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:29,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:59:29,204 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:59:29,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:59:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:29,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 05:59:29,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:59:30,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 05:59:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:59:30,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:59:31,062 INFO L354 Elim1Store]: treesize reduction 56, result has 48.6 percent of original size [2021-11-20 05:59:31,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2021-11-20 05:59:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:59:31,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689899368] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:59:31,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:59:31,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 9] total 27 [2021-11-20 05:59:31,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562904205] [2021-11-20 05:59:31,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:59:31,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 05:59:31,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:31,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 05:59:31,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-11-20 05:59:31,428 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-20 05:59:31,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 159 transitions, 447 flow. Second operand has 27 states, 27 states have (on average 107.66666666666667) internal successors, (2907), 27 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:31,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:59:31,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-20 05:59:31,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:59:34,355 INFO L129 PetriNetUnfolder]: 2823/5593 cut-off events. [2021-11-20 05:59:34,356 INFO L130 PetriNetUnfolder]: For 2597/2597 co-relation queries the response was YES. [2021-11-20 05:59:34,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11960 conditions, 5593 events. 2823/5593 cut-off events. For 2597/2597 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 42068 event pairs, 189 based on Foata normal form. 0/5261 useless extension candidates. Maximal degree in co-relation 11947. Up to 1582 conditions per place. [2021-11-20 05:59:34,426 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 297 selfloop transitions, 100 changer transitions 4/494 dead transitions. [2021-11-20 05:59:34,426 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 494 transitions, 2157 flow [2021-11-20 05:59:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-20 05:59:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-11-20 05:59:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 5080 transitions. [2021-11-20 05:59:34,500 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.648786717752235 [2021-11-20 05:59:34,500 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 5080 transitions. [2021-11-20 05:59:34,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 5080 transitions. [2021-11-20 05:59:34,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:59:34,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 5080 transitions. [2021-11-20 05:59:34,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 112.88888888888889) internal successors, (5080), 45 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:34,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 174.0) internal successors, (8004), 46 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:34,569 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 174.0) internal successors, (8004), 46 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:34,579 INFO L186 Difference]: Start difference. First operand has 182 places, 159 transitions, 447 flow. Second operand 45 states and 5080 transitions. [2021-11-20 05:59:34,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 494 transitions, 2157 flow [2021-11-20 05:59:34,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 494 transitions, 2114 flow, removed 7 selfloop flow, removed 11 redundant places. [2021-11-20 05:59:34,602 INFO L242 Difference]: Finished difference. Result has 238 places, 244 transitions, 1100 flow [2021-11-20 05:59:34,603 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1100, PETRI_PLACES=238, PETRI_TRANSITIONS=244} [2021-11-20 05:59:34,604 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 83 predicate places. [2021-11-20 05:59:34,604 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 244 transitions, 1100 flow [2021-11-20 05:59:34,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 107.66666666666667) internal successors, (2907), 27 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:34,607 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:59:34,607 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:34,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:59:34,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 05:59:34,821 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:59:34,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:34,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1472592122, now seen corresponding path program 2 times [2021-11-20 05:59:34,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:34,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552653949] [2021-11-20 05:59:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:34,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:59:35,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:35,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552653949] [2021-11-20 05:59:35,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552653949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:59:35,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:59:35,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-20 05:59:35,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747556200] [2021-11-20 05:59:35,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:59:35,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:59:35,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:35,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:59:35,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:59:35,607 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-20 05:59:35,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 244 transitions, 1100 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:35,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:59:35,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-20 05:59:35,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:59:38,154 INFO L129 PetriNetUnfolder]: 2844/5683 cut-off events. [2021-11-20 05:59:38,154 INFO L130 PetriNetUnfolder]: For 13335/13359 co-relation queries the response was YES. [2021-11-20 05:59:38,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17373 conditions, 5683 events. 2844/5683 cut-off events. For 13335/13359 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 42829 event pairs, 568 based on Foata normal form. 9/5657 useless extension candidates. Maximal degree in co-relation 17337. Up to 2871 conditions per place. [2021-11-20 05:59:38,260 INFO L132 encePairwiseOnDemand]: 144/174 looper letters, 193 selfloop transitions, 81 changer transitions 40/407 dead transitions. [2021-11-20 05:59:38,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 407 transitions, 2622 flow [2021-11-20 05:59:38,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 05:59:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-20 05:59:38,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3430 transitions. [2021-11-20 05:59:38,279 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.635891731553578 [2021-11-20 05:59:38,279 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3430 transitions. [2021-11-20 05:59:38,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3430 transitions. [2021-11-20 05:59:38,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:59:38,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3430 transitions. [2021-11-20 05:59:38,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 110.64516129032258) internal successors, (3430), 31 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:38,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:38,317 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:38,317 INFO L186 Difference]: Start difference. First operand has 238 places, 244 transitions, 1100 flow. Second operand 31 states and 3430 transitions. [2021-11-20 05:59:38,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 407 transitions, 2622 flow [2021-11-20 05:59:38,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 407 transitions, 2549 flow, removed 3 selfloop flow, removed 16 redundant places. [2021-11-20 05:59:38,476 INFO L242 Difference]: Finished difference. Result has 265 places, 274 transitions, 1630 flow [2021-11-20 05:59:38,477 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1630, PETRI_PLACES=265, PETRI_TRANSITIONS=274} [2021-11-20 05:59:38,478 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 110 predicate places. [2021-11-20 05:59:38,478 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 274 transitions, 1630 flow [2021-11-20 05:59:38,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:38,480 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:59:38,480 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:38,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 05:59:38,481 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:59:38,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:38,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1057355944, now seen corresponding path program 3 times [2021-11-20 05:59:38,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:38,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072011997] [2021-11-20 05:59:38,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:38,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:59:39,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:39,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072011997] [2021-11-20 05:59:39,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072011997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:59:39,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:59:39,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-20 05:59:39,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320980028] [2021-11-20 05:59:39,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:59:39,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 05:59:39,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:39,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 05:59:39,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:59:39,696 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2021-11-20 05:59:39,699 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 274 transitions, 1630 flow. Second operand has 22 states, 22 states have (on average 97.5909090909091) internal successors, (2147), 22 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:39,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:59:39,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2021-11-20 05:59:39,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:59:43,672 INFO L129 PetriNetUnfolder]: 3426/6750 cut-off events. [2021-11-20 05:59:43,673 INFO L130 PetriNetUnfolder]: For 21640/21664 co-relation queries the response was YES. [2021-11-20 05:59:43,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23018 conditions, 6750 events. 3426/6750 cut-off events. For 21640/21664 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 53532 event pairs, 451 based on Foata normal form. 48/6766 useless extension candidates. Maximal degree in co-relation 22968. Up to 1818 conditions per place. [2021-11-20 05:59:43,795 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 264 selfloop transitions, 135 changer transitions 4/490 dead transitions. [2021-11-20 05:59:43,795 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 490 transitions, 3681 flow [2021-11-20 05:59:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 05:59:43,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-20 05:59:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3714 transitions. [2021-11-20 05:59:43,806 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.592911877394636 [2021-11-20 05:59:43,806 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3714 transitions. [2021-11-20 05:59:43,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3714 transitions. [2021-11-20 05:59:43,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:59:43,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3714 transitions. [2021-11-20 05:59:43,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 103.16666666666667) internal successors, (3714), 36 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:43,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:43,835 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:43,835 INFO L186 Difference]: Start difference. First operand has 265 places, 274 transitions, 1630 flow. Second operand 36 states and 3714 transitions. [2021-11-20 05:59:43,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 490 transitions, 3681 flow [2021-11-20 05:59:44,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 490 transitions, 3497 flow, removed 76 selfloop flow, removed 17 redundant places. [2021-11-20 05:59:44,012 INFO L242 Difference]: Finished difference. Result has 291 places, 318 transitions, 2408 flow [2021-11-20 05:59:44,013 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2408, PETRI_PLACES=291, PETRI_TRANSITIONS=318} [2021-11-20 05:59:44,014 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 136 predicate places. [2021-11-20 05:59:44,014 INFO L470 AbstractCegarLoop]: Abstraction has has 291 places, 318 transitions, 2408 flow [2021-11-20 05:59:44,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 97.5909090909091) internal successors, (2147), 22 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:44,015 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:59:44,015 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:44,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 05:59:44,015 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:59:44,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:44,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1103704106, now seen corresponding path program 4 times [2021-11-20 05:59:44,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:44,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587664599] [2021-11-20 05:59:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:44,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:59:44,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:44,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587664599] [2021-11-20 05:59:44,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587664599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:59:44,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:59:44,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-20 05:59:44,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978774801] [2021-11-20 05:59:44,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:59:44,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:59:44,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:44,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:59:44,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:59:44,719 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-20 05:59:44,721 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 318 transitions, 2408 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:44,721 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:59:44,721 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-20 05:59:44,721 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:59:47,359 INFO L129 PetriNetUnfolder]: 3482/6917 cut-off events. [2021-11-20 05:59:47,360 INFO L130 PetriNetUnfolder]: For 28378/28402 co-relation queries the response was YES. [2021-11-20 05:59:47,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26014 conditions, 6917 events. 3482/6917 cut-off events. For 28378/28402 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 54804 event pairs, 1053 based on Foata normal form. 9/6876 useless extension candidates. Maximal degree in co-relation 25952. Up to 3925 conditions per place. [2021-11-20 05:59:47,604 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 212 selfloop transitions, 114 changer transitions 7/426 dead transitions. [2021-11-20 05:59:47,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 426 transitions, 3774 flow [2021-11-20 05:59:47,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 05:59:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-20 05:59:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3201 transitions. [2021-11-20 05:59:47,616 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6343638525564804 [2021-11-20 05:59:47,616 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3201 transitions. [2021-11-20 05:59:47,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3201 transitions. [2021-11-20 05:59:47,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:59:47,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3201 transitions. [2021-11-20 05:59:47,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.37931034482759) internal successors, (3201), 29 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:47,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:47,636 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:47,637 INFO L186 Difference]: Start difference. First operand has 291 places, 318 transitions, 2408 flow. Second operand 29 states and 3201 transitions. [2021-11-20 05:59:47,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 426 transitions, 3774 flow [2021-11-20 05:59:47,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 426 transitions, 3621 flow, removed 48 selfloop flow, removed 20 redundant places. [2021-11-20 05:59:47,886 INFO L242 Difference]: Finished difference. Result has 305 places, 333 transitions, 2756 flow [2021-11-20 05:59:47,887 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2756, PETRI_PLACES=305, PETRI_TRANSITIONS=333} [2021-11-20 05:59:47,888 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 150 predicate places. [2021-11-20 05:59:47,888 INFO L470 AbstractCegarLoop]: Abstraction has has 305 places, 333 transitions, 2756 flow [2021-11-20 05:59:47,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:47,889 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:59:47,889 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:47,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 05:59:47,890 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:59:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:47,890 INFO L85 PathProgramCache]: Analyzing trace with hash -79375042, now seen corresponding path program 1 times [2021-11-20 05:59:47,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:47,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105562496] [2021-11-20 05:59:47,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:47,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:59:48,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:48,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105562496] [2021-11-20 05:59:48,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105562496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:59:48,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:59:48,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-20 05:59:48,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693083880] [2021-11-20 05:59:48,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:59:48,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:59:48,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:48,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:59:48,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:59:48,568 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-20 05:59:48,571 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 333 transitions, 2756 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:48,571 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:59:48,571 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-20 05:59:48,571 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:59:51,468 INFO L129 PetriNetUnfolder]: 3564/7113 cut-off events. [2021-11-20 05:59:51,468 INFO L130 PetriNetUnfolder]: For 26560/26584 co-relation queries the response was YES. [2021-11-20 05:59:51,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26361 conditions, 7113 events. 3564/7113 cut-off events. For 26560/26584 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 57133 event pairs, 1245 based on Foata normal form. 19/7070 useless extension candidates. Maximal degree in co-relation 26296. Up to 3925 conditions per place. [2021-11-20 05:59:51,565 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 232 selfloop transitions, 90 changer transitions 37/452 dead transitions. [2021-11-20 05:59:51,565 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 452 transitions, 4174 flow [2021-11-20 05:59:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 05:59:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-20 05:59:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3336 transitions. [2021-11-20 05:59:51,573 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.639080459770115 [2021-11-20 05:59:51,573 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3336 transitions. [2021-11-20 05:59:51,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3336 transitions. [2021-11-20 05:59:51,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:59:51,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3336 transitions. [2021-11-20 05:59:51,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 111.2) internal successors, (3336), 30 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:51,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:51,592 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:51,592 INFO L186 Difference]: Start difference. First operand has 305 places, 333 transitions, 2756 flow. Second operand 30 states and 3336 transitions. [2021-11-20 05:59:51,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 452 transitions, 4174 flow [2021-11-20 05:59:51,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 452 transitions, 3987 flow, removed 22 selfloop flow, removed 22 redundant places. [2021-11-20 05:59:51,832 INFO L242 Difference]: Finished difference. Result has 316 places, 342 transitions, 2928 flow [2021-11-20 05:59:51,833 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2610, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2928, PETRI_PLACES=316, PETRI_TRANSITIONS=342} [2021-11-20 05:59:51,834 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 161 predicate places. [2021-11-20 05:59:51,834 INFO L470 AbstractCegarLoop]: Abstraction has has 316 places, 342 transitions, 2928 flow [2021-11-20 05:59:51,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:51,835 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:59:51,835 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:51,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 05:59:51,836 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:59:51,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:51,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2019158248, now seen corresponding path program 2 times [2021-11-20 05:59:51,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:51,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071225767] [2021-11-20 05:59:51,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:51,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:59:52,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:52,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071225767] [2021-11-20 05:59:52,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071225767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:59:52,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:59:52,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-20 05:59:52,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654357347] [2021-11-20 05:59:52,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:59:52,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 05:59:52,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:52,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 05:59:52,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:59:52,618 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-20 05:59:52,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 342 transitions, 2928 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:52,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:59:52,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-20 05:59:52,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:59:55,692 INFO L129 PetriNetUnfolder]: 3657/7209 cut-off events. [2021-11-20 05:59:55,692 INFO L130 PetriNetUnfolder]: For 27674/27710 co-relation queries the response was YES. [2021-11-20 05:59:55,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26762 conditions, 7209 events. 3657/7209 cut-off events. For 27674/27710 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 57415 event pairs, 1088 based on Foata normal form. 37/7195 useless extension candidates. Maximal degree in co-relation 26693. Up to 3925 conditions per place. [2021-11-20 05:59:55,789 INFO L132 encePairwiseOnDemand]: 144/174 looper letters, 265 selfloop transitions, 155 changer transitions 1/514 dead transitions. [2021-11-20 05:59:55,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 514 transitions, 4962 flow [2021-11-20 05:59:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 05:59:55,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-20 05:59:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3893 transitions. [2021-11-20 05:59:55,798 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6392446633825944 [2021-11-20 05:59:55,798 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3893 transitions. [2021-11-20 05:59:55,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3893 transitions. [2021-11-20 05:59:55,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:59:55,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3893 transitions. [2021-11-20 05:59:55,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 111.22857142857143) internal successors, (3893), 35 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:55,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:55,820 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:55,820 INFO L186 Difference]: Start difference. First operand has 316 places, 342 transitions, 2928 flow. Second operand 35 states and 3893 transitions. [2021-11-20 05:59:55,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 514 transitions, 4962 flow [2021-11-20 05:59:56,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 514 transitions, 4801 flow, removed 35 selfloop flow, removed 21 redundant places. [2021-11-20 05:59:56,097 INFO L242 Difference]: Finished difference. Result has 333 places, 381 transitions, 3773 flow [2021-11-20 05:59:56,098 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2813, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3773, PETRI_PLACES=333, PETRI_TRANSITIONS=381} [2021-11-20 05:59:56,099 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 178 predicate places. [2021-11-20 05:59:56,099 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 381 transitions, 3773 flow [2021-11-20 05:59:56,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:56,100 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:59:56,101 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:56,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 05:59:56,102 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:59:56,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash 974409732, now seen corresponding path program 3 times [2021-11-20 05:59:56,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:56,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130666195] [2021-11-20 05:59:56,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:56,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:59:57,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:57,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130666195] [2021-11-20 05:59:57,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130666195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:59:57,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:59:57,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-20 05:59:57,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50891582] [2021-11-20 05:59:57,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:59:57,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 05:59:57,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:57,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 05:59:57,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:59:57,392 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2021-11-20 05:59:57,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 381 transitions, 3773 flow. Second operand has 22 states, 22 states have (on average 97.5909090909091) internal successors, (2147), 22 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:57,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:59:57,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2021-11-20 05:59:57,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:00:00,924 INFO L129 PetriNetUnfolder]: 3665/7278 cut-off events. [2021-11-20 06:00:00,924 INFO L130 PetriNetUnfolder]: For 32316/32352 co-relation queries the response was YES. [2021-11-20 06:00:01,219 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28069 conditions, 7278 events. 3665/7278 cut-off events. For 32316/32352 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 58661 event pairs, 1277 based on Foata normal form. 25/7252 useless extension candidates. Maximal degree in co-relation 27995. Up to 3929 conditions per place. [2021-11-20 06:00:01,270 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 229 selfloop transitions, 128 changer transitions 36/480 dead transitions. [2021-11-20 06:00:01,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 480 transitions, 5108 flow [2021-11-20 06:00:01,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:00:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-20 06:00:01,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3152 transitions. [2021-11-20 06:00:01,278 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5843529847979236 [2021-11-20 06:00:01,278 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3152 transitions. [2021-11-20 06:00:01,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3152 transitions. [2021-11-20 06:00:01,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:00:01,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3152 transitions. [2021-11-20 06:00:01,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 101.6774193548387) internal successors, (3152), 31 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:01,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:01,297 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:01,298 INFO L186 Difference]: Start difference. First operand has 333 places, 381 transitions, 3773 flow. Second operand 31 states and 3152 transitions. [2021-11-20 06:00:01,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 480 transitions, 5108 flow [2021-11-20 06:00:01,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 480 transitions, 4901 flow, removed 54 selfloop flow, removed 19 redundant places. [2021-11-20 06:00:01,545 INFO L242 Difference]: Finished difference. Result has 349 places, 379 transitions, 3845 flow [2021-11-20 06:00:01,546 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3542, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3845, PETRI_PLACES=349, PETRI_TRANSITIONS=379} [2021-11-20 06:00:01,547 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 194 predicate places. [2021-11-20 06:00:01,547 INFO L470 AbstractCegarLoop]: Abstraction has has 349 places, 379 transitions, 3845 flow [2021-11-20 06:00:01,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 97.5909090909091) internal successors, (2147), 22 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:01,547 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:00:01,547 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:00:01,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:00:01,548 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:00:01,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:01,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1118018948, now seen corresponding path program 4 times [2021-11-20 06:00:01,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:01,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676868875] [2021-11-20 06:00:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:01,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:00:02,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:02,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676868875] [2021-11-20 06:00:02,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676868875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:02,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:00:02,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-20 06:00:02,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265386687] [2021-11-20 06:00:02,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:02,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:00:02,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:02,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:00:02,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:00:02,191 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-20 06:00:02,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 379 transitions, 3845 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:02,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:00:02,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-20 06:00:02,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:00:05,493 INFO L129 PetriNetUnfolder]: 3954/7756 cut-off events. [2021-11-20 06:00:05,493 INFO L130 PetriNetUnfolder]: For 32939/32964 co-relation queries the response was YES. [2021-11-20 06:00:05,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29918 conditions, 7756 events. 3954/7756 cut-off events. For 32939/32964 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 62379 event pairs, 1281 based on Foata normal form. 36/7740 useless extension candidates. Maximal degree in co-relation 29840. Up to 3925 conditions per place. [2021-11-20 06:00:05,620 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 274 selfloop transitions, 179 changer transitions 0/546 dead transitions. [2021-11-20 06:00:05,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 546 transitions, 6173 flow [2021-11-20 06:00:05,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:00:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-20 06:00:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3574 transitions. [2021-11-20 06:00:05,629 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.641882183908046 [2021-11-20 06:00:05,630 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3574 transitions. [2021-11-20 06:00:05,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3574 transitions. [2021-11-20 06:00:05,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:00:05,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3574 transitions. [2021-11-20 06:00:05,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 111.6875) internal successors, (3574), 32 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:05,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:05,654 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:05,654 INFO L186 Difference]: Start difference. First operand has 349 places, 379 transitions, 3845 flow. Second operand 32 states and 3574 transitions. [2021-11-20 06:00:05,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 546 transitions, 6173 flow [2021-11-20 06:00:05,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 546 transitions, 5946 flow, removed 17 selfloop flow, removed 25 redundant places. [2021-11-20 06:00:05,913 INFO L242 Difference]: Finished difference. Result has 362 places, 426 transitions, 4947 flow [2021-11-20 06:00:05,914 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4947, PETRI_PLACES=362, PETRI_TRANSITIONS=426} [2021-11-20 06:00:05,915 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 207 predicate places. [2021-11-20 06:00:05,916 INFO L470 AbstractCegarLoop]: Abstraction has has 362 places, 426 transitions, 4947 flow [2021-11-20 06:00:05,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:05,916 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:00:05,917 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:00:05,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:00:05,917 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:00:05,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:05,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2056916346, now seen corresponding path program 5 times [2021-11-20 06:00:05,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:05,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847638428] [2021-11-20 06:00:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:05,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:00:06,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:06,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847638428] [2021-11-20 06:00:06,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847638428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:06,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:00:06,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-20 06:00:06,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368158992] [2021-11-20 06:00:06,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:06,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:00:06,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:06,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:00:06,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:00:06,795 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-20 06:00:06,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 426 transitions, 4947 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:06,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:00:06,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-20 06:00:06,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:00:10,002 INFO L129 PetriNetUnfolder]: 4008/7799 cut-off events. [2021-11-20 06:00:10,003 INFO L130 PetriNetUnfolder]: For 39229/39254 co-relation queries the response was YES. [2021-11-20 06:00:10,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31686 conditions, 7799 events. 4008/7799 cut-off events. For 39229/39254 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 62677 event pairs, 1407 based on Foata normal form. 16/7755 useless extension candidates. Maximal degree in co-relation 31603. Up to 3925 conditions per place. [2021-11-20 06:00:10,147 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 270 selfloop transitions, 157 changer transitions 0/520 dead transitions. [2021-11-20 06:00:10,147 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 520 transitions, 6545 flow [2021-11-20 06:00:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:00:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-20 06:00:10,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3225 transitions. [2021-11-20 06:00:10,156 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6391200951248514 [2021-11-20 06:00:10,157 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3225 transitions. [2021-11-20 06:00:10,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3225 transitions. [2021-11-20 06:00:10,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:00:10,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3225 transitions. [2021-11-20 06:00:10,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 111.20689655172414) internal successors, (3225), 29 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:10,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:10,174 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:10,175 INFO L186 Difference]: Start difference. First operand has 362 places, 426 transitions, 4947 flow. Second operand 29 states and 3225 transitions. [2021-11-20 06:00:10,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 520 transitions, 6545 flow [2021-11-20 06:00:10,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 520 transitions, 6433 flow, removed 26 selfloop flow, removed 16 redundant places. [2021-11-20 06:00:10,534 INFO L242 Difference]: Finished difference. Result has 383 places, 446 transitions, 5646 flow [2021-11-20 06:00:10,534 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=4838, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5646, PETRI_PLACES=383, PETRI_TRANSITIONS=446} [2021-11-20 06:00:10,535 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 228 predicate places. [2021-11-20 06:00:10,535 INFO L470 AbstractCegarLoop]: Abstraction has has 383 places, 446 transitions, 5646 flow [2021-11-20 06:00:10,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:10,535 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:00:10,536 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:00:10,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:00:10,536 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:00:10,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:10,537 INFO L85 PathProgramCache]: Analyzing trace with hash -203232578, now seen corresponding path program 5 times [2021-11-20 06:00:10,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:10,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391854282] [2021-11-20 06:00:10,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:10,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:00:11,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:11,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391854282] [2021-11-20 06:00:11,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391854282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:11,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:00:11,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-20 06:00:11,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029633075] [2021-11-20 06:00:11,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:11,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:00:11,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:11,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:00:11,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:00:11,136 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-20 06:00:11,138 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 446 transitions, 5646 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:11,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:00:11,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-20 06:00:11,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:00:14,479 INFO L129 PetriNetUnfolder]: 4021/7862 cut-off events. [2021-11-20 06:00:14,479 INFO L130 PetriNetUnfolder]: For 40402/40427 co-relation queries the response was YES. [2021-11-20 06:00:14,578 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32173 conditions, 7862 events. 4021/7862 cut-off events. For 40402/40427 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 63524 event pairs, 1414 based on Foata normal form. 14/7814 useless extension candidates. Maximal degree in co-relation 32082. Up to 3925 conditions per place. [2021-11-20 06:00:14,609 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 275 selfloop transitions, 139 changer transitions 12/519 dead transitions. [2021-11-20 06:00:14,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 519 transitions, 6947 flow [2021-11-20 06:00:14,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:00:14,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-20 06:00:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3205 transitions. [2021-11-20 06:00:14,617 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6351565596512089 [2021-11-20 06:00:14,617 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3205 transitions. [2021-11-20 06:00:14,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3205 transitions. [2021-11-20 06:00:14,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:00:14,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3205 transitions. [2021-11-20 06:00:14,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.51724137931035) internal successors, (3205), 29 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:14,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:14,633 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:14,633 INFO L186 Difference]: Start difference. First operand has 383 places, 446 transitions, 5646 flow. Second operand 29 states and 3205 transitions. [2021-11-20 06:00:14,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 519 transitions, 6947 flow [2021-11-20 06:00:14,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 519 transitions, 6742 flow, removed 28 selfloop flow, removed 18 redundant places. [2021-11-20 06:00:15,010 INFO L242 Difference]: Finished difference. Result has 398 places, 450 transitions, 5811 flow [2021-11-20 06:00:15,010 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5443, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5811, PETRI_PLACES=398, PETRI_TRANSITIONS=450} [2021-11-20 06:00:15,011 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 243 predicate places. [2021-11-20 06:00:15,011 INFO L470 AbstractCegarLoop]: Abstraction has has 398 places, 450 transitions, 5811 flow [2021-11-20 06:00:15,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:15,012 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:00:15,012 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:00:15,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:00:15,013 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:00:15,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:15,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1821375558, now seen corresponding path program 6 times [2021-11-20 06:00:15,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:15,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555313605] [2021-11-20 06:00:15,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:15,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:00:15,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:15,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555313605] [2021-11-20 06:00:15,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555313605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:15,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990150083] [2021-11-20 06:00:15,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:00:15,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:15,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:15,948 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:15,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:00:16,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-20 06:00:16,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:00:16,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-20 06:00:16,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:18,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:00:18,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 06:00:19,218 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-20 06:00:19,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 06:00:19,423 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:00:19,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-11-20 06:00:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:00:19,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:00:38,059 INFO L354 Elim1Store]: treesize reduction 39, result has 64.2 percent of original size [2021-11-20 06:00:38,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31128 treesize of output 28893 [2021-11-20 06:00:40,269 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:00:40,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:00:40,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-20 06:00:40,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726180712] [2021-11-20 06:00:40,270 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:00:40,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:00:40,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:40,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:00:40,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2393, Unknown=9, NotChecked=0, Total=2652 [2021-11-20 06:00:40,276 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-11-20 06:00:40,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 450 transitions, 5811 flow. Second operand has 22 states, 22 states have (on average 101.45454545454545) internal successors, (2232), 22 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:40,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:00:40,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-11-20 06:00:40,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:00:44,550 INFO L129 PetriNetUnfolder]: 3882/7442 cut-off events. [2021-11-20 06:00:44,550 INFO L130 PetriNetUnfolder]: For 42267/42292 co-relation queries the response was YES. [2021-11-20 06:00:44,676 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31150 conditions, 7442 events. 3882/7442 cut-off events. For 42267/42292 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 58601 event pairs, 585 based on Foata normal form. 42/7451 useless extension candidates. Maximal degree in co-relation 31056. Up to 1844 conditions per place. [2021-11-20 06:00:44,711 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 296 selfloop transitions, 231 changer transitions 3/620 dead transitions. [2021-11-20 06:00:44,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 620 transitions, 7805 flow [2021-11-20 06:00:44,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 06:00:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-20 06:00:44,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3851 transitions. [2021-11-20 06:00:44,718 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6147828863346104 [2021-11-20 06:00:44,718 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3851 transitions. [2021-11-20 06:00:44,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3851 transitions. [2021-11-20 06:00:44,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:00:44,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3851 transitions. [2021-11-20 06:00:44,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 106.97222222222223) internal successors, (3851), 36 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:44,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:44,737 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:44,738 INFO L186 Difference]: Start difference. First operand has 398 places, 450 transitions, 5811 flow. Second operand 36 states and 3851 transitions. [2021-11-20 06:00:44,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 620 transitions, 7805 flow [2021-11-20 06:00:45,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 620 transitions, 7582 flow, removed 10 selfloop flow, removed 23 redundant places. [2021-11-20 06:00:45,074 INFO L242 Difference]: Finished difference. Result has 411 places, 454 transitions, 6156 flow [2021-11-20 06:00:45,075 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5591, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6156, PETRI_PLACES=411, PETRI_TRANSITIONS=454} [2021-11-20 06:00:45,075 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 256 predicate places. [2021-11-20 06:00:45,075 INFO L470 AbstractCegarLoop]: Abstraction has has 411 places, 454 transitions, 6156 flow [2021-11-20 06:00:45,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.45454545454545) internal successors, (2232), 22 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:45,076 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:00:45,076 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:00:45,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 06:00:45,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0fe4a21-3440-4b61-8e61-6e5168b3e4b1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:45,277 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:00:45,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:45,278 INFO L85 PathProgramCache]: Analyzing trace with hash -337413404, now seen corresponding path program 6 times [2021-11-20 06:00:45,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:45,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095643586] [2021-11-20 06:00:45,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:45,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:00:45,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:45,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095643586] [2021-11-20 06:00:45,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095643586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:45,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:00:45,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-20 06:00:45,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865091744] [2021-11-20 06:00:45,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:45,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:00:45,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:45,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:00:45,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:00:45,829 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-20 06:00:45,831 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 454 transitions, 6156 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:45,831 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:00:45,831 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-20 06:00:45,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:00:49,514 INFO L129 PetriNetUnfolder]: 3928/7595 cut-off events. [2021-11-20 06:00:49,514 INFO L130 PetriNetUnfolder]: For 50425/50450 co-relation queries the response was YES. [2021-11-20 06:00:49,636 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33509 conditions, 7595 events. 3928/7595 cut-off events. For 50425/50450 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 60256 event pairs, 1298 based on Foata normal form. 18/7551 useless extension candidates. Maximal degree in co-relation 33416. Up to 3702 conditions per place. [2021-11-20 06:00:49,670 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 270 selfloop transitions, 172 changer transitions 0/535 dead transitions. [2021-11-20 06:00:49,670 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 535 transitions, 7784 flow [2021-11-20 06:00:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:00:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-20 06:00:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3013 transitions. [2021-11-20 06:00:49,674 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6413367390378885 [2021-11-20 06:00:49,674 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3013 transitions. [2021-11-20 06:00:49,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3013 transitions. [2021-11-20 06:00:49,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:00:49,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3013 transitions. [2021-11-20 06:00:49,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 111.5925925925926) internal successors, (3013), 27 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:49,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:49,690 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:49,690 INFO L186 Difference]: Start difference. First operand has 411 places, 454 transitions, 6156 flow. Second operand 27 states and 3013 transitions. [2021-11-20 06:00:49,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 535 transitions, 7784 flow [2021-11-20 06:00:50,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 535 transitions, 7319 flow, removed 9 selfloop flow, removed 32 redundant places. [2021-11-20 06:00:50,082 INFO L242 Difference]: Finished difference. Result has 411 places, 473 transitions, 6650 flow [2021-11-20 06:00:50,083 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5730, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6650, PETRI_PLACES=411, PETRI_TRANSITIONS=473} [2021-11-20 06:00:50,083 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 256 predicate places. [2021-11-20 06:00:50,084 INFO L470 AbstractCegarLoop]: Abstraction has has 411 places, 473 transitions, 6650 flow [2021-11-20 06:00:50,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:50,085 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:00:50,085 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:00:50,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:00:50,085 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:00:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:50,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1559492904, now seen corresponding path program 7 times [2021-11-20 06:00:50,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:50,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206586126] [2021-11-20 06:00:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:50,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:00:50,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:50,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206586126] [2021-11-20 06:00:50,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206586126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:50,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:00:50,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-20 06:00:50,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931236021] [2021-11-20 06:00:50,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:50,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:00:50,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:50,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:00:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:00:50,632 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-20 06:00:50,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 473 transitions, 6650 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:50,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:00:50,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-20 06:00:50,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:00:53,973 INFO L129 PetriNetUnfolder]: 3988/7687 cut-off events. [2021-11-20 06:00:53,973 INFO L130 PetriNetUnfolder]: For 49187/49212 co-relation queries the response was YES. [2021-11-20 06:00:54,091 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34246 conditions, 7687 events. 3988/7687 cut-off events. For 49187/49212 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 61023 event pairs, 1278 based on Foata normal form. 22/7648 useless extension candidates. Maximal degree in co-relation 34148. Up to 3702 conditions per place. [2021-11-20 06:00:54,127 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 288 selfloop transitions, 187 changer transitions 0/568 dead transitions. [2021-11-20 06:00:54,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 568 transitions, 8592 flow [2021-11-20 06:00:54,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:00:54,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-20 06:00:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2906 transitions. [2021-11-20 06:00:54,132 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6423519009725907 [2021-11-20 06:00:54,132 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2906 transitions. [2021-11-20 06:00:54,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2906 transitions. [2021-11-20 06:00:54,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:00:54,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2906 transitions. [2021-11-20 06:00:54,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 111.76923076923077) internal successors, (2906), 26 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:54,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:54,146 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:54,147 INFO L186 Difference]: Start difference. First operand has 411 places, 473 transitions, 6650 flow. Second operand 26 states and 2906 transitions. [2021-11-20 06:00:54,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 568 transitions, 8592 flow [2021-11-20 06:00:54,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 568 transitions, 8352 flow, removed 4 selfloop flow, removed 21 redundant places. [2021-11-20 06:00:54,537 INFO L242 Difference]: Finished difference. Result has 421 places, 499 transitions, 7616 flow [2021-11-20 06:00:54,538 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=6431, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7616, PETRI_PLACES=421, PETRI_TRANSITIONS=499} [2021-11-20 06:00:54,539 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 266 predicate places. [2021-11-20 06:00:54,539 INFO L470 AbstractCegarLoop]: Abstraction has has 421 places, 499 transitions, 7616 flow [2021-11-20 06:00:54,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:54,540 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:00:54,540 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:00:54,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 06:00:54,541 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:00:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:54,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1944326404, now seen corresponding path program 8 times [2021-11-20 06:00:54,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:54,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016592812] [2021-11-20 06:00:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:54,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:00:55,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016592812] [2021-11-20 06:00:55,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016592812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:55,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:00:55,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-20 06:00:55,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672657054] [2021-11-20 06:00:55,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:55,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:00:55,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:55,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:00:55,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:00:55,078 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-20 06:00:55,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 499 transitions, 7616 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:55,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:00:55,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-20 06:00:55,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:00:58,709 INFO L129 PetriNetUnfolder]: 3981/7681 cut-off events. [2021-11-20 06:00:58,709 INFO L130 PetriNetUnfolder]: For 53040/53065 co-relation queries the response was YES. [2021-11-20 06:00:58,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34745 conditions, 7681 events. 3981/7681 cut-off events. For 53040/53065 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 61037 event pairs, 1290 based on Foata normal form. 18/7639 useless extension candidates. Maximal degree in co-relation 34641. Up to 3702 conditions per place. [2021-11-20 06:00:58,882 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 278 selfloop transitions, 195 changer transitions 0/566 dead transitions. [2021-11-20 06:00:58,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 566 transitions, 8962 flow [2021-11-20 06:00:58,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:00:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-20 06:00:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3019 transitions. [2021-11-20 06:00:58,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6426138782460622 [2021-11-20 06:00:58,889 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3019 transitions. [2021-11-20 06:00:58,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3019 transitions. [2021-11-20 06:00:58,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:00:58,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3019 transitions. [2021-11-20 06:00:58,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 111.81481481481481) internal successors, (3019), 27 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:58,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:58,903 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:58,904 INFO L186 Difference]: Start difference. First operand has 421 places, 499 transitions, 7616 flow. Second operand 27 states and 3019 transitions. [2021-11-20 06:00:58,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 566 transitions, 8962 flow [2021-11-20 06:00:59,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 566 transitions, 8714 flow, removed 1 selfloop flow, removed 20 redundant places. [2021-11-20 06:00:59,331 INFO L242 Difference]: Finished difference. Result has 431 places, 502 transitions, 7944 flow [2021-11-20 06:00:59,332 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7352, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7944, PETRI_PLACES=431, PETRI_TRANSITIONS=502} [2021-11-20 06:00:59,333 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 276 predicate places. [2021-11-20 06:00:59,333 INFO L470 AbstractCegarLoop]: Abstraction has has 431 places, 502 transitions, 7944 flow [2021-11-20 06:00:59,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:59,333 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:00:59,333 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:00:59,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 06:00:59,334 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:00:59,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:59,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1794322682, now seen corresponding path program 7 times [2021-11-20 06:00:59,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:59,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092121255] [2021-11-20 06:00:59,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:59,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:00:59,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:59,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092121255] [2021-11-20 06:00:59,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092121255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:59,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:00:59,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-20 06:00:59,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83873287] [2021-11-20 06:00:59,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:59,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:00:59,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:59,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:00:59,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:00:59,893 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-20 06:00:59,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 502 transitions, 7944 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:59,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:00:59,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-20 06:00:59,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:01:03,329 INFO L129 PetriNetUnfolder]: 3962/7668 cut-off events. [2021-11-20 06:01:03,329 INFO L130 PetriNetUnfolder]: For 55229/55254 co-relation queries the response was YES. [2021-11-20 06:01:03,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34755 conditions, 7668 events. 3962/7668 cut-off events. For 55229/55254 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 61002 event pairs, 1281 based on Foata normal form. 20/7629 useless extension candidates. Maximal degree in co-relation 34648. Up to 3702 conditions per place. [2021-11-20 06:01:03,499 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 301 selfloop transitions, 162 changer transitions 7/563 dead transitions. [2021-11-20 06:01:03,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 563 transitions, 9041 flow [2021-11-20 06:01:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:01:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-20 06:01:03,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2892 transitions. [2021-11-20 06:01:03,504 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6392572944297082 [2021-11-20 06:01:03,504 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2892 transitions. [2021-11-20 06:01:03,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2892 transitions. [2021-11-20 06:01:03,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:01:03,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2892 transitions. [2021-11-20 06:01:03,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 111.23076923076923) internal successors, (2892), 26 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:03,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:03,517 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:03,517 INFO L186 Difference]: Start difference. First operand has 431 places, 502 transitions, 7944 flow. Second operand 26 states and 2892 transitions. [2021-11-20 06:01:03,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 563 transitions, 9041 flow [2021-11-20 06:01:04,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 563 transitions, 8853 flow, removed 22 selfloop flow, removed 21 redundant places. [2021-11-20 06:01:04,222 INFO L242 Difference]: Finished difference. Result has 438 places, 497 transitions, 7943 flow [2021-11-20 06:01:04,223 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7575, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7943, PETRI_PLACES=438, PETRI_TRANSITIONS=497} [2021-11-20 06:01:04,223 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 283 predicate places. [2021-11-20 06:01:04,223 INFO L470 AbstractCegarLoop]: Abstraction has has 438 places, 497 transitions, 7943 flow [2021-11-20 06:01:04,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:04,224 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:01:04,224 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:04,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 06:01:04,224 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:01:04,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:04,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1354667942, now seen corresponding path program 9 times [2021-11-20 06:01:04,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:04,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118149814] [2021-11-20 06:01:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:04,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:01:04,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:04,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118149814] [2021-11-20 06:01:04,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118149814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:04,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:04,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-20 06:01:04,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198243465] [2021-11-20 06:01:04,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:04,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:01:04,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:04,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:01:04,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:01:04,901 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-20 06:01:04,904 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 497 transitions, 7943 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:04,904 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:01:04,904 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-20 06:01:04,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:01:08,473 INFO L129 PetriNetUnfolder]: 3978/7716 cut-off events. [2021-11-20 06:01:08,473 INFO L130 PetriNetUnfolder]: For 58633/58658 co-relation queries the response was YES. [2021-11-20 06:01:08,634 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35248 conditions, 7716 events. 3978/7716 cut-off events. For 58633/58658 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 61686 event pairs, 1273 based on Foata normal form. 14/7666 useless extension candidates. Maximal degree in co-relation 35142. Up to 3702 conditions per place. [2021-11-20 06:01:08,675 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 303 selfloop transitions, 161 changer transitions 11/568 dead transitions. [2021-11-20 06:01:08,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 568 transitions, 9321 flow [2021-11-20 06:01:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:01:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-20 06:01:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3097 transitions. [2021-11-20 06:01:08,679 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6356732348111659 [2021-11-20 06:01:08,679 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3097 transitions. [2021-11-20 06:01:08,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3097 transitions. [2021-11-20 06:01:08,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:01:08,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3097 transitions. [2021-11-20 06:01:08,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 110.60714285714286) internal successors, (3097), 28 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:08,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:08,693 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:08,693 INFO L186 Difference]: Start difference. First operand has 438 places, 497 transitions, 7943 flow. Second operand 28 states and 3097 transitions. [2021-11-20 06:01:08,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 568 transitions, 9321 flow [2021-11-20 06:01:09,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 568 transitions, 9068 flow, removed 2 selfloop flow, removed 21 redundant places. [2021-11-20 06:01:09,483 INFO L242 Difference]: Finished difference. Result has 446 places, 495 transitions, 7980 flow [2021-11-20 06:01:09,484 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7691, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7980, PETRI_PLACES=446, PETRI_TRANSITIONS=495} [2021-11-20 06:01:09,485 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 291 predicate places. [2021-11-20 06:01:09,485 INFO L470 AbstractCegarLoop]: Abstraction has has 446 places, 495 transitions, 7980 flow [2021-11-20 06:01:09,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:09,486 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:01:09,486 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:09,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 06:01:09,487 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:01:09,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:09,487 INFO L85 PathProgramCache]: Analyzing trace with hash -896028936, now seen corresponding path program 8 times [2021-11-20 06:01:09,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:09,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597272033] [2021-11-20 06:01:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:09,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:01:10,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:10,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597272033] [2021-11-20 06:01:10,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597272033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:10,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:10,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-20 06:01:10,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971688150] [2021-11-20 06:01:10,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:10,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:01:10,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:10,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:01:10,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:01:10,390 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-11-20 06:01:10,392 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 495 transitions, 7980 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:10,392 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:01:10,392 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-11-20 06:01:10,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:01:14,395 INFO L129 PetriNetUnfolder]: 4009/7744 cut-off events. [2021-11-20 06:01:14,395 INFO L130 PetriNetUnfolder]: For 60236/60261 co-relation queries the response was YES. [2021-11-20 06:01:14,532 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35670 conditions, 7744 events. 4009/7744 cut-off events. For 60236/60261 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 61675 event pairs, 1271 based on Foata normal form. 20/7708 useless extension candidates. Maximal degree in co-relation 35564. Up to 3703 conditions per place. [2021-11-20 06:01:14,574 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 298 selfloop transitions, 192 changer transitions 3/583 dead transitions. [2021-11-20 06:01:14,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 583 transitions, 9719 flow [2021-11-20 06:01:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:01:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-20 06:01:14,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2754 transitions. [2021-11-20 06:01:14,580 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6087533156498673 [2021-11-20 06:01:14,580 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2754 transitions. [2021-11-20 06:01:14,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2754 transitions. [2021-11-20 06:01:14,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:01:14,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2754 transitions. [2021-11-20 06:01:14,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 105.92307692307692) internal successors, (2754), 26 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:14,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:14,595 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:14,596 INFO L186 Difference]: Start difference. First operand has 446 places, 495 transitions, 7980 flow. Second operand 26 states and 2754 transitions. [2021-11-20 06:01:14,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 583 transitions, 9719 flow [2021-11-20 06:01:15,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 583 transitions, 9518 flow, removed 10 selfloop flow, removed 25 redundant places. [2021-11-20 06:01:15,094 INFO L242 Difference]: Finished difference. Result has 449 places, 515 transitions, 8704 flow [2021-11-20 06:01:15,095 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7788, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8704, PETRI_PLACES=449, PETRI_TRANSITIONS=515} [2021-11-20 06:01:15,096 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 294 predicate places. [2021-11-20 06:01:15,096 INFO L470 AbstractCegarLoop]: Abstraction has has 449 places, 515 transitions, 8704 flow [2021-11-20 06:01:15,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:15,096 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:01:15,097 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:15,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 06:01:15,097 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:01:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:15,097 INFO L85 PathProgramCache]: Analyzing trace with hash 867412328, now seen corresponding path program 10 times [2021-11-20 06:01:15,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:15,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163852314] [2021-11-20 06:01:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:15,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:01:15,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:15,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163852314] [2021-11-20 06:01:15,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163852314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:15,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:15,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-20 06:01:15,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647352731] [2021-11-20 06:01:15,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:15,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:01:15,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:15,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:01:15,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:01:15,654 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-20 06:01:15,656 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 515 transitions, 8704 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:15,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:01:15,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-20 06:01:15,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:01:19,559 INFO L129 PetriNetUnfolder]: 3995/7747 cut-off events. [2021-11-20 06:01:19,560 INFO L130 PetriNetUnfolder]: For 65315/65337 co-relation queries the response was YES. [2021-11-20 06:01:19,686 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36168 conditions, 7747 events. 3995/7747 cut-off events. For 65315/65337 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 61934 event pairs, 1354 based on Foata normal form. 14/7699 useless extension candidates. Maximal degree in co-relation 36058. Up to 3702 conditions per place. [2021-11-20 06:01:19,720 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 313 selfloop transitions, 163 changer transitions 7/576 dead transitions. [2021-11-20 06:01:19,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 576 transitions, 9979 flow [2021-11-20 06:01:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:01:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-20 06:01:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2881 transitions. [2021-11-20 06:01:19,723 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6368258178603006 [2021-11-20 06:01:19,723 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2881 transitions. [2021-11-20 06:01:19,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2881 transitions. [2021-11-20 06:01:19,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:01:19,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2881 transitions. [2021-11-20 06:01:19,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 110.8076923076923) internal successors, (2881), 26 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:19,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:19,732 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:19,732 INFO L186 Difference]: Start difference. First operand has 449 places, 515 transitions, 8704 flow. Second operand 26 states and 2881 transitions. [2021-11-20 06:01:19,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 576 transitions, 9979 flow [2021-11-20 06:01:20,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 576 transitions, 9699 flow, removed 15 selfloop flow, removed 21 redundant places. [2021-11-20 06:01:20,224 INFO L242 Difference]: Finished difference. Result has 454 places, 512 transitions, 8684 flow [2021-11-20 06:01:20,225 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=8398, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8684, PETRI_PLACES=454, PETRI_TRANSITIONS=512} [2021-11-20 06:01:20,225 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 299 predicate places. [2021-11-20 06:01:20,225 INFO L470 AbstractCegarLoop]: Abstraction has has 454 places, 512 transitions, 8684 flow [2021-11-20 06:01:20,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:20,226 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:01:20,226 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:20,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 06:01:20,226 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:01:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:20,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2082896642, now seen corresponding path program 9 times [2021-11-20 06:01:20,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:20,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565359757] [2021-11-20 06:01:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:20,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:01:20,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565359757] [2021-11-20 06:01:20,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565359757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:20,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:20,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-20 06:01:20,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430807480] [2021-11-20 06:01:20,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:20,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:01:20,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:20,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:01:20,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:01:20,803 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-20 06:01:20,806 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 512 transitions, 8684 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:20,806 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:01:20,806 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-20 06:01:20,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:01:24,880 INFO L129 PetriNetUnfolder]: 4354/8381 cut-off events. [2021-11-20 06:01:24,880 INFO L130 PetriNetUnfolder]: For 71886/71908 co-relation queries the response was YES. [2021-11-20 06:01:24,997 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38988 conditions, 8381 events. 4354/8381 cut-off events. For 71886/71908 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 67701 event pairs, 1285 based on Foata normal form. 42/8361 useless extension candidates. Maximal degree in co-relation 38879. Up to 3726 conditions per place. [2021-11-20 06:01:25,041 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 331 selfloop transitions, 220 changer transitions 0/644 dead transitions. [2021-11-20 06:01:25,042 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 644 transitions, 10658 flow [2021-11-20 06:01:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:01:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-20 06:01:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3582 transitions. [2021-11-20 06:01:25,046 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6433189655172413 [2021-11-20 06:01:25,046 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3582 transitions. [2021-11-20 06:01:25,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3582 transitions. [2021-11-20 06:01:25,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:01:25,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3582 transitions. [2021-11-20 06:01:25,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 111.9375) internal successors, (3582), 32 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:25,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:25,056 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:25,056 INFO L186 Difference]: Start difference. First operand has 454 places, 512 transitions, 8684 flow. Second operand 32 states and 3582 transitions. [2021-11-20 06:01:25,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 644 transitions, 10658 flow [2021-11-20 06:01:25,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 644 transitions, 10177 flow, removed 3 selfloop flow, removed 28 redundant places. [2021-11-20 06:01:25,577 INFO L242 Difference]: Finished difference. Result has 459 places, 531 transitions, 9063 flow [2021-11-20 06:01:25,578 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=8230, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9063, PETRI_PLACES=459, PETRI_TRANSITIONS=531} [2021-11-20 06:01:25,578 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 304 predicate places. [2021-11-20 06:01:25,578 INFO L470 AbstractCegarLoop]: Abstraction has has 459 places, 531 transitions, 9063 flow [2021-11-20 06:01:25,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:25,579 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:01:25,579 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:25,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 06:01:25,580 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:01:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:25,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1837180646, now seen corresponding path program 11 times [2021-11-20 06:01:25,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:25,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357029628] [2021-11-20 06:01:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:25,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:01:26,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:26,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357029628] [2021-11-20 06:01:26,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357029628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:26,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:26,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-20 06:01:26,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239588003] [2021-11-20 06:01:26,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:26,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:01:26,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:26,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:01:26,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:01:26,422 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-11-20 06:01:26,424 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 531 transitions, 9063 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:26,424 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:01:26,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-11-20 06:01:26,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand