./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.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_92e9b53b-3773-4365-86ef-a91249aa5a5c/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e9b53b-3773-4365-86ef-a91249aa5a5c/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_92e9b53b-3773-4365-86ef-a91249aa5a5c/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e9b53b-3773-4365-86ef-a91249aa5a5c/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e9b53b-3773-4365-86ef-a91249aa5a5c/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_92e9b53b-3773-4365-86ef-a91249aa5a5c/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 c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:27:06,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:27:06,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:27:06,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:27:06,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:27:06,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:27:06,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:27:06,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:27:06,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:27:06,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:27:06,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:27:06,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:27:06,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:27:06,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:27:06,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:27:06,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:27:06,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:27:06,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:27:06,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:27:06,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:27:06,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:27:06,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:27:06,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:27:06,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:27:06,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:27:06,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:27:06,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:27:06,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:27:06,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:27:06,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:27:06,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:27:06,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:27:06,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:27:06,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:27:06,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:27:06,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:27:06,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:27:06,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:27:06,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:27:06,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:27:06,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:27:06,850 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e9b53b-3773-4365-86ef-a91249aa5a5c/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:27:06,912 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:27:06,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:27:06,914 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:27:06,914 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:27:06,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:27:06,921 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:27:06,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:27:06,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:27:06,923 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:27:06,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:27:06,923 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:27:06,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:27:06,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:27:06,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:27:06,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:27:06,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:27:06,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:27:06,925 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:27:06,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:27:06,926 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:27:06,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:27:06,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:27:06,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:27:06,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:27:06,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:27:06,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:27:06,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:27:06,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:27:06,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:27:06,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:27:06,929 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:27:06,929 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:27:06,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:27:06,930 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:27:06,930 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_92e9b53b-3773-4365-86ef-a91249aa5a5c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e9b53b-3773-4365-86ef-a91249aa5a5c/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 [2021-11-20 07:27:07,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:27:07,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:27:07,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:27:07,261 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:27:07,262 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:27:07,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e9b53b-3773-4365-86ef-a91249aa5a5c/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2021-11-20 07:27:07,385 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e9b53b-3773-4365-86ef-a91249aa5a5c/bin/uautomizer-DQz5hQGWxF/data/c98a9b679/e17945e691b44816aa5d074fb70f5593/FLAGb480105b3 [2021-11-20 07:27:07,899 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:27:07,900 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e9b53b-3773-4365-86ef-a91249aa5a5c/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2021-11-20 07:27:07,908 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e9b53b-3773-4365-86ef-a91249aa5a5c/bin/uautomizer-DQz5hQGWxF/data/c98a9b679/e17945e691b44816aa5d074fb70f5593/FLAGb480105b3 [2021-11-20 07:27:08,278 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e9b53b-3773-4365-86ef-a91249aa5a5c/bin/uautomizer-DQz5hQGWxF/data/c98a9b679/e17945e691b44816aa5d074fb70f5593 [2021-11-20 07:27:08,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:27:08,286 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:27:08,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:27:08,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:27:08,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:27:08,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:27:08" (1/1) ... [2021-11-20 07:27:08,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14bd2ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:08, skipping insertion in model container [2021-11-20 07:27:08,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:27:08" (1/1) ... [2021-11-20 07:27:08,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:27:08,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:27:08,591 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_92e9b53b-3773-4365-86ef-a91249aa5a5c/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2021-11-20 07:27:08,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:27:08,612 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:27:08,648 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_92e9b53b-3773-4365-86ef-a91249aa5a5c/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2021-11-20 07:27:08,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:27:08,674 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:27:08,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:08 WrapperNode [2021-11-20 07:27:08,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:27:08,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:27:08,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:27:08,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:27:08,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:08" (1/1) ... [2021-11-20 07:27:08,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:08" (1/1) ... [2021-11-20 07:27:08,734 INFO L137 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 257 [2021-11-20 07:27:08,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:27:08,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:27:08,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:27:08,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:27:08,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:08" (1/1) ... [2021-11-20 07:27:08,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:08" (1/1) ... [2021-11-20 07:27:08,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:08" (1/1) ... [2021-11-20 07:27:08,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:08" (1/1) ... [2021-11-20 07:27:08,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:08" (1/1) ... [2021-11-20 07:27:08,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:08" (1/1) ... [2021-11-20 07:27:08,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:08" (1/1) ... [2021-11-20 07:27:08,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:27:08,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:27:08,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:27:08,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:27:08,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:08" (1/1) ... [2021-11-20 07:27:08,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:27:08,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e9b53b-3773-4365-86ef-a91249aa5a5c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:08,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e9b53b-3773-4365-86ef-a91249aa5a5c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:27:08,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e9b53b-3773-4365-86ef-a91249aa5a5c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:27:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:27:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:27:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:27:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:27:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-20 07:27:08,901 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-20 07:27:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-20 07:27:08,902 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-20 07:27:08,902 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-20 07:27:08,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-20 07:27:08,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:27:08,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-20 07:27:08,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-20 07:27:08,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:27:08,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:27:08,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:27:08,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:27:08,907 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 07:27:09,070 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:27:09,072 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:27:09,479 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:27:09,774 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:27:09,774 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 07:27:09,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:27:09 BoogieIcfgContainer [2021-11-20 07:27:09,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:27:09,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:27:09,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:27:09,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:27:09,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:27:08" (1/3) ... [2021-11-20 07:27:09,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab2bbdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:27:09, skipping insertion in model container [2021-11-20 07:27:09,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:08" (2/3) ... [2021-11-20 07:27:09,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab2bbdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:27:09, skipping insertion in model container [2021-11-20 07:27:09,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:27:09" (3/3) ... [2021-11-20 07:27:09,805 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2021-11-20 07:27:09,811 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 07:27:09,811 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:27:09,811 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:27:09,811 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 07:27:09,866 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,867 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,867 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,867 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,868 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,868 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,868 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,868 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,868 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,869 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,869 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,869 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,869 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,869 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,871 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,871 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,871 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,871 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,872 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,872 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,872 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,872 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,872 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,873 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,873 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,873 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,873 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,873 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,874 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,874 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,874 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,874 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,875 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,875 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,875 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,876 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,876 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,876 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,876 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,876 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,898 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,898 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,898 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,898 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,899 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,899 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,899 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,899 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,900 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,900 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,900 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,900 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,902 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,902 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,903 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,903 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,903 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,903 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,903 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,904 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,904 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,904 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,904 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,905 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,905 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,905 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,905 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,905 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,906 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,906 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,906 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,907 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,907 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,907 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,911 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,911 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,911 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,912 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,912 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,912 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,912 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,913 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,913 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,913 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,914 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,916 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,916 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,916 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,916 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,917 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,917 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,918 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,918 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,918 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,918 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,919 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:27:09,922 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-20 07:27:09,985 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:27:09,994 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 07:27:09,994 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-20 07:27:10,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 215 places, 223 transitions, 470 flow [2021-11-20 07:27:10,168 INFO L129 PetriNetUnfolder]: 18/220 cut-off events. [2021-11-20 07:27:10,168 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-20 07:27:10,175 INFO L84 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 220 events. 18/220 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 125 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 180. Up to 3 conditions per place. [2021-11-20 07:27:10,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 223 transitions, 470 flow [2021-11-20 07:27:10,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 209 transitions, 436 flow [2021-11-20 07:27:10,301 INFO L129 PetriNetUnfolder]: 18/208 cut-off events. [2021-11-20 07:27:10,303 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-20 07:27:10,303 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:10,304 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:10,305 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:10,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:10,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1261378579, now seen corresponding path program 1 times [2021-11-20 07:27:10,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:10,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111850659] [2021-11-20 07:27:10,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:10,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:10,729 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 07:27:10,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:10,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111850659] [2021-11-20 07:27:10,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111850659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:10,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:10,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:27:10,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860043473] [2021-11-20 07:27:10,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:10,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:27:10,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:10,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:27:10,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:27:10,786 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 223 [2021-11-20 07:27:10,791 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 209 transitions, 436 flow. Second operand has 2 states, 2 states have (on average 203.5) internal successors, (407), 2 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 07:27:10,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:10,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 223 [2021-11-20 07:27:10,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:10,965 INFO L129 PetriNetUnfolder]: 71/400 cut-off events. [2021-11-20 07:27:10,965 INFO L130 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2021-11-20 07:27:10,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 400 events. 71/400 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1176 event pairs, 38 based on Foata normal form. 60/419 useless extension candidates. Maximal degree in co-relation 353. Up to 106 conditions per place. [2021-11-20 07:27:10,977 INFO L132 encePairwiseOnDemand]: 210/223 looper letters, 11 selfloop transitions, 0 changer transitions 6/196 dead transitions. [2021-11-20 07:27:10,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 196 transitions, 432 flow [2021-11-20 07:27:10,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:27:10,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-20 07:27:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 420 transitions. [2021-11-20 07:27:11,005 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9417040358744395 [2021-11-20 07:27:11,006 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 420 transitions. [2021-11-20 07:27:11,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 420 transitions. [2021-11-20 07:27:11,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:11,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 420 transitions. [2021-11-20 07:27:11,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 210.0) internal successors, (420), 2 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 07:27:11,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states 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 07:27:11,049 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states 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 07:27:11,051 INFO L186 Difference]: Start difference. First operand has 201 places, 209 transitions, 436 flow. Second operand 2 states and 420 transitions. [2021-11-20 07:27:11,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 196 transitions, 432 flow [2021-11-20 07:27:11,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 196 transitions, 420 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-11-20 07:27:11,069 INFO L242 Difference]: Finished difference. Result has 196 places, 190 transitions, 386 flow [2021-11-20 07:27:11,072 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=386, PETRI_PLACES=196, PETRI_TRANSITIONS=190} [2021-11-20 07:27:11,077 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, -5 predicate places. [2021-11-20 07:27:11,078 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 190 transitions, 386 flow [2021-11-20 07:27:11,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 203.5) internal successors, (407), 2 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 07:27:11,079 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:11,080 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, 1, 1, 1, 1, 1, 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 07:27:11,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:27:11,081 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:11,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:11,083 INFO L85 PathProgramCache]: Analyzing trace with hash -319257289, now seen corresponding path program 1 times [2021-11-20 07:27:11,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:11,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233225427] [2021-11-20 07:27:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:11,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:11,413 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 07:27:11,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:11,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233225427] [2021-11-20 07:27:11,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233225427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:11,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:11,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:27:11,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339598697] [2021-11-20 07:27:11,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:11,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:27:11,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:11,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:27:11,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:27:11,422 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 223 [2021-11-20 07:27:11,424 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 190 transitions, 386 flow. Second operand has 6 states, 6 states have (on average 176.66666666666666) internal successors, (1060), 6 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:11,424 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:11,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 223 [2021-11-20 07:27:11,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:11,796 INFO L129 PetriNetUnfolder]: 73/481 cut-off events. [2021-11-20 07:27:11,796 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-11-20 07:27:11,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 481 events. 73/481 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1445 event pairs, 38 based on Foata normal form. 11/453 useless extension candidates. Maximal degree in co-relation 649. Up to 118 conditions per place. [2021-11-20 07:27:11,802 INFO L132 encePairwiseOnDemand]: 211/223 looper letters, 33 selfloop transitions, 8 changer transitions 17/211 dead transitions. [2021-11-20 07:27:11,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 211 transitions, 547 flow [2021-11-20 07:27:11,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:27:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-20 07:27:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1609 transitions. [2021-11-20 07:27:11,819 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8016940707523668 [2021-11-20 07:27:11,819 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1609 transitions. [2021-11-20 07:27:11,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1609 transitions. [2021-11-20 07:27:11,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:11,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1609 transitions. [2021-11-20 07:27:11,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 178.77777777777777) internal successors, (1609), 9 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:11,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 223.0) internal successors, (2230), 10 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states 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 07:27:11,858 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 223.0) internal successors, (2230), 10 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states 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 07:27:11,858 INFO L186 Difference]: Start difference. First operand has 196 places, 190 transitions, 386 flow. Second operand 9 states and 1609 transitions. [2021-11-20 07:27:11,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 211 transitions, 547 flow [2021-11-20 07:27:11,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 211 transitions, 547 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 07:27:11,874 INFO L242 Difference]: Finished difference. Result has 200 places, 191 transitions, 418 flow [2021-11-20 07:27:11,875 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=418, PETRI_PLACES=200, PETRI_TRANSITIONS=191} [2021-11-20 07:27:11,878 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, -1 predicate places. [2021-11-20 07:27:11,878 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 191 transitions, 418 flow [2021-11-20 07:27:11,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 176.66666666666666) internal successors, (1060), 6 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:11,880 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:11,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:11,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:27:11,881 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1559305920, now seen corresponding path program 1 times [2021-11-20 07:27:11,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:11,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400416172] [2021-11-20 07:27:11,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:11,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:12,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:12,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400416172] [2021-11-20 07:27:12,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400416172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:12,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:12,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:27:12,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269944106] [2021-11-20 07:27:12,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:12,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:27:12,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:12,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:27:12,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:27:12,161 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 223 [2021-11-20 07:27:12,164 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 191 transitions, 418 flow. Second operand has 6 states, 6 states have (on average 177.33333333333334) internal successors, (1064), 6 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states 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 07:27:12,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:12,164 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 223 [2021-11-20 07:27:12,165 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:12,449 INFO L129 PetriNetUnfolder]: 92/516 cut-off events. [2021-11-20 07:27:12,449 INFO L130 PetriNetUnfolder]: For 87/111 co-relation queries the response was YES. [2021-11-20 07:27:12,451 INFO L84 FinitePrefix]: Finished finitePrefix Result has 818 conditions, 516 events. 92/516 cut-off events. For 87/111 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1770 event pairs, 50 based on Foata normal form. 13/481 useless extension candidates. Maximal degree in co-relation 812. Up to 115 conditions per place. [2021-11-20 07:27:12,455 INFO L132 encePairwiseOnDemand]: 214/223 looper letters, 36 selfloop transitions, 6 changer transitions 8/203 dead transitions. [2021-11-20 07:27:12,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 203 transitions, 552 flow [2021-11-20 07:27:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:27:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-20 07:27:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1255 transitions. [2021-11-20 07:27:12,461 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8039718129404229 [2021-11-20 07:27:12,462 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1255 transitions. [2021-11-20 07:27:12,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1255 transitions. [2021-11-20 07:27:12,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:12,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1255 transitions. [2021-11-20 07:27:12,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 179.28571428571428) internal successors, (1255), 7 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 07:27:12,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 223.0) internal successors, (1784), 8 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states 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 07:27:12,477 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 223.0) internal successors, (1784), 8 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states 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 07:27:12,477 INFO L186 Difference]: Start difference. First operand has 200 places, 191 transitions, 418 flow. Second operand 7 states and 1255 transitions. [2021-11-20 07:27:12,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 203 transitions, 552 flow [2021-11-20 07:27:12,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 203 transitions, 538 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-11-20 07:27:12,489 INFO L242 Difference]: Finished difference. Result has 201 places, 192 transitions, 428 flow [2021-11-20 07:27:12,490 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=428, PETRI_PLACES=201, PETRI_TRANSITIONS=192} [2021-11-20 07:27:12,493 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 0 predicate places. [2021-11-20 07:27:12,493 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 192 transitions, 428 flow [2021-11-20 07:27:12,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 177.33333333333334) internal successors, (1064), 6 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states 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 07:27:12,495 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:12,495 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:12,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:27:12,496 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:12,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:12,497 INFO L85 PathProgramCache]: Analyzing trace with hash -420338195, now seen corresponding path program 1 times [2021-11-20 07:27:12,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:12,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387988161] [2021-11-20 07:27:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:12,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:12,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:12,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387988161] [2021-11-20 07:27:12,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387988161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:12,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:12,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:27:12,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428012999] [2021-11-20 07:27:12,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:12,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:27:12,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:12,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:27:12,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:27:12,814 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 223 [2021-11-20 07:27:12,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 192 transitions, 428 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states 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 07:27:12,816 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:12,816 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 223 [2021-11-20 07:27:12,816 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:12,955 INFO L129 PetriNetUnfolder]: 79/421 cut-off events. [2021-11-20 07:27:12,956 INFO L130 PetriNetUnfolder]: For 84/94 co-relation queries the response was YES. [2021-11-20 07:27:12,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 421 events. 79/421 cut-off events. For 84/94 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1216 event pairs, 23 based on Foata normal form. 6/405 useless extension candidates. Maximal degree in co-relation 654. Up to 79 conditions per place. [2021-11-20 07:27:12,963 INFO L132 encePairwiseOnDemand]: 220/223 looper letters, 19 selfloop transitions, 2 changer transitions 0/198 dead transitions. [2021-11-20 07:27:12,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 198 transitions, 492 flow [2021-11-20 07:27:12,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:27:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-20 07:27:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2021-11-20 07:27:12,967 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9028400597907325 [2021-11-20 07:27:12,967 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2021-11-20 07:27:12,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2021-11-20 07:27:12,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:12,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2021-11-20 07:27:12,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:12,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:12,977 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:12,977 INFO L186 Difference]: Start difference. First operand has 201 places, 192 transitions, 428 flow. Second operand 3 states and 604 transitions. [2021-11-20 07:27:12,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 198 transitions, 492 flow [2021-11-20 07:27:12,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 198 transitions, 482 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-20 07:27:12,985 INFO L242 Difference]: Finished difference. Result has 199 places, 193 transitions, 432 flow [2021-11-20 07:27:12,986 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=199, PETRI_TRANSITIONS=193} [2021-11-20 07:27:12,988 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, -2 predicate places. [2021-11-20 07:27:12,989 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 193 transitions, 432 flow [2021-11-20 07:27:12,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states 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 07:27:12,993 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:12,993 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:12,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:27:12,994 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:12,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:12,995 INFO L85 PathProgramCache]: Analyzing trace with hash -46819677, now seen corresponding path program 2 times [2021-11-20 07:27:12,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:12,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55640179] [2021-11-20 07:27:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:12,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:13,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:13,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55640179] [2021-11-20 07:27:13,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55640179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:13,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:13,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:27:13,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902254452] [2021-11-20 07:27:13,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:13,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:27:13,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:13,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:27:13,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:27:13,328 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 223 [2021-11-20 07:27:13,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 193 transitions, 432 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states 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 07:27:13,329 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:13,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 223 [2021-11-20 07:27:13,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:13,439 INFO L129 PetriNetUnfolder]: 58/373 cut-off events. [2021-11-20 07:27:13,440 INFO L130 PetriNetUnfolder]: For 90/104 co-relation queries the response was YES. [2021-11-20 07:27:13,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 373 events. 58/373 cut-off events. For 90/104 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 885 event pairs, 9 based on Foata normal form. 2/351 useless extension candidates. Maximal degree in co-relation 593. Up to 91 conditions per place. [2021-11-20 07:27:13,453 INFO L132 encePairwiseOnDemand]: 217/223 looper letters, 18 selfloop transitions, 5 changer transitions 0/197 dead transitions. [2021-11-20 07:27:13,453 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 197 transitions, 492 flow [2021-11-20 07:27:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:27:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-20 07:27:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2021-11-20 07:27:13,457 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.890881913303438 [2021-11-20 07:27:13,457 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2021-11-20 07:27:13,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2021-11-20 07:27:13,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:13,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2021-11-20 07:27:13,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states 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 07:27:13,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:13,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:13,465 INFO L186 Difference]: Start difference. First operand has 199 places, 193 transitions, 432 flow. Second operand 3 states and 596 transitions. [2021-11-20 07:27:13,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 197 transitions, 492 flow [2021-11-20 07:27:13,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 197 transitions, 484 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-11-20 07:27:13,473 INFO L242 Difference]: Finished difference. Result has 200 places, 195 transitions, 453 flow [2021-11-20 07:27:13,474 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=453, PETRI_PLACES=200, PETRI_TRANSITIONS=195} [2021-11-20 07:27:13,477 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, -1 predicate places. [2021-11-20 07:27:13,477 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 195 transitions, 453 flow [2021-11-20 07:27:13,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states 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 07:27:13,478 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:13,478 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:13,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:27:13,479 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:13,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:13,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1995193659, now seen corresponding path program 3 times [2021-11-20 07:27:13,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:13,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079155092] [2021-11-20 07:27:13,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:13,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:14,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:14,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079155092] [2021-11-20 07:27:14,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079155092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:14,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:14,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:14,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972178592] [2021-11-20 07:27:14,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:14,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:14,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:14,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:14,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:14,879 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:14,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 195 transitions, 453 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:14,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:14,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:14,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:16,176 INFO L129 PetriNetUnfolder]: 840/1884 cut-off events. [2021-11-20 07:27:16,176 INFO L130 PetriNetUnfolder]: For 805/827 co-relation queries the response was YES. [2021-11-20 07:27:16,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3983 conditions, 1884 events. 840/1884 cut-off events. For 805/827 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11468 event pairs, 431 based on Foata normal form. 1/1729 useless extension candidates. Maximal degree in co-relation 3974. Up to 983 conditions per place. [2021-11-20 07:27:16,199 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 114 selfloop transitions, 41 changer transitions 5/295 dead transitions. [2021-11-20 07:27:16,200 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 295 transitions, 1082 flow [2021-11-20 07:27:16,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:27:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-20 07:27:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2934 transitions. [2021-11-20 07:27:16,211 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6924710880339863 [2021-11-20 07:27:16,211 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2934 transitions. [2021-11-20 07:27:16,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2934 transitions. [2021-11-20 07:27:16,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:16,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2934 transitions. [2021-11-20 07:27:16,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 154.42105263157896) internal successors, (2934), 19 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states 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 07:27:16,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:27:16,238 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:27:16,239 INFO L186 Difference]: Start difference. First operand has 200 places, 195 transitions, 453 flow. Second operand 19 states and 2934 transitions. [2021-11-20 07:27:16,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 295 transitions, 1082 flow [2021-11-20 07:27:16,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 295 transitions, 1047 flow, removed 13 selfloop flow, removed 1 redundant places. [2021-11-20 07:27:16,253 INFO L242 Difference]: Finished difference. Result has 226 places, 233 transitions, 670 flow [2021-11-20 07:27:16,254 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=670, PETRI_PLACES=226, PETRI_TRANSITIONS=233} [2021-11-20 07:27:16,258 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 25 predicate places. [2021-11-20 07:27:16,258 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 233 transitions, 670 flow [2021-11-20 07:27:16,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:16,260 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:16,260 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:16,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 07:27:16,261 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:16,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:16,262 INFO L85 PathProgramCache]: Analyzing trace with hash 717178791, now seen corresponding path program 4 times [2021-11-20 07:27:16,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:16,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072397557] [2021-11-20 07:27:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:16,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:17,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:17,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072397557] [2021-11-20 07:27:17,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072397557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:17,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:17,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:17,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225425041] [2021-11-20 07:27:17,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:17,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:17,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:17,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:17,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:17,737 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:17,742 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 233 transitions, 670 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:17,742 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:17,742 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:17,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:19,317 INFO L129 PetriNetUnfolder]: 993/2354 cut-off events. [2021-11-20 07:27:19,318 INFO L130 PetriNetUnfolder]: For 1314/1328 co-relation queries the response was YES. [2021-11-20 07:27:19,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5533 conditions, 2354 events. 993/2354 cut-off events. For 1314/1328 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16206 event pairs, 267 based on Foata normal form. 12/2272 useless extension candidates. Maximal degree in co-relation 5515. Up to 1050 conditions per place. [2021-11-20 07:27:19,354 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 135 selfloop transitions, 56 changer transitions 5/331 dead transitions. [2021-11-20 07:27:19,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 331 transitions, 1466 flow [2021-11-20 07:27:19,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:27:19,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-20 07:27:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3091 transitions. [2021-11-20 07:27:19,367 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6930493273542601 [2021-11-20 07:27:19,367 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3091 transitions. [2021-11-20 07:27:19,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3091 transitions. [2021-11-20 07:27:19,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:19,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3091 transitions. [2021-11-20 07:27:19,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.55) internal successors, (3091), 20 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states 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 07:27:19,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:19,397 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:19,397 INFO L186 Difference]: Start difference. First operand has 226 places, 233 transitions, 670 flow. Second operand 20 states and 3091 transitions. [2021-11-20 07:27:19,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 331 transitions, 1466 flow [2021-11-20 07:27:19,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 331 transitions, 1446 flow, removed 6 selfloop flow, removed 6 redundant places. [2021-11-20 07:27:19,431 INFO L242 Difference]: Finished difference. Result has 248 places, 257 transitions, 973 flow [2021-11-20 07:27:19,432 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=973, PETRI_PLACES=248, PETRI_TRANSITIONS=257} [2021-11-20 07:27:19,432 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 47 predicate places. [2021-11-20 07:27:19,433 INFO L470 AbstractCegarLoop]: Abstraction has has 248 places, 257 transitions, 973 flow [2021-11-20 07:27:19,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:19,435 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:19,435 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:19,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 07:27:19,435 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:19,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:19,438 INFO L85 PathProgramCache]: Analyzing trace with hash -966069153, now seen corresponding path program 5 times [2021-11-20 07:27:19,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:19,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780835486] [2021-11-20 07:27:19,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:19,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:20,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:20,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780835486] [2021-11-20 07:27:20,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780835486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:20,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:20,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:20,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788428006] [2021-11-20 07:27:20,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:20,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:20,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:20,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:20,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:20,516 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:20,519 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 257 transitions, 973 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:20,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:20,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:20,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:22,083 INFO L129 PetriNetUnfolder]: 1064/2582 cut-off events. [2021-11-20 07:27:22,084 INFO L130 PetriNetUnfolder]: For 3265/3287 co-relation queries the response was YES. [2021-11-20 07:27:22,101 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6921 conditions, 2582 events. 1064/2582 cut-off events. For 3265/3287 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 18773 event pairs, 264 based on Foata normal form. 14/2498 useless extension candidates. Maximal degree in co-relation 6894. Up to 1295 conditions per place. [2021-11-20 07:27:22,123 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 140 selfloop transitions, 55 changer transitions 5/335 dead transitions. [2021-11-20 07:27:22,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 335 transitions, 1757 flow [2021-11-20 07:27:22,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:27:22,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-20 07:27:22,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3084 transitions. [2021-11-20 07:27:22,136 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6914798206278027 [2021-11-20 07:27:22,136 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3084 transitions. [2021-11-20 07:27:22,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3084 transitions. [2021-11-20 07:27:22,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:22,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3084 transitions. [2021-11-20 07:27:22,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.2) internal successors, (3084), 20 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states 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 07:27:22,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:22,180 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:22,181 INFO L186 Difference]: Start difference. First operand has 248 places, 257 transitions, 973 flow. Second operand 20 states and 3084 transitions. [2021-11-20 07:27:22,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 335 transitions, 1757 flow [2021-11-20 07:27:22,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 335 transitions, 1679 flow, removed 23 selfloop flow, removed 8 redundant places. [2021-11-20 07:27:22,220 INFO L242 Difference]: Finished difference. Result has 264 places, 270 transitions, 1152 flow [2021-11-20 07:27:22,221 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1152, PETRI_PLACES=264, PETRI_TRANSITIONS=270} [2021-11-20 07:27:22,223 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 63 predicate places. [2021-11-20 07:27:22,224 INFO L470 AbstractCegarLoop]: Abstraction has has 264 places, 270 transitions, 1152 flow [2021-11-20 07:27:22,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:22,225 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:22,225 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:22,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 07:27:22,226 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:22,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:22,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1938757037, now seen corresponding path program 6 times [2021-11-20 07:27:22,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:22,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312485884] [2021-11-20 07:27:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:22,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:23,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:23,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312485884] [2021-11-20 07:27:23,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312485884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:23,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:23,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:23,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006526121] [2021-11-20 07:27:23,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:23,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:23,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:23,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:23,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:23,223 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:23,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 270 transitions, 1152 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:23,227 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:23,227 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:23,227 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:24,585 INFO L129 PetriNetUnfolder]: 1112/2694 cut-off events. [2021-11-20 07:27:24,585 INFO L130 PetriNetUnfolder]: For 4930/4952 co-relation queries the response was YES. [2021-11-20 07:27:24,607 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7837 conditions, 2694 events. 1112/2694 cut-off events. For 4930/4952 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19897 event pairs, 387 based on Foata normal form. 14/2592 useless extension candidates. Maximal degree in co-relation 7804. Up to 1477 conditions per place. [2021-11-20 07:27:24,637 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 149 selfloop transitions, 53 changer transitions 5/342 dead transitions. [2021-11-20 07:27:24,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 342 transitions, 1989 flow [2021-11-20 07:27:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:27:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:27:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2782 transitions. [2021-11-20 07:27:24,648 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.693074240159442 [2021-11-20 07:27:24,648 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2782 transitions. [2021-11-20 07:27:24,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2782 transitions. [2021-11-20 07:27:24,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:24,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2782 transitions. [2021-11-20 07:27:24,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.55555555555554) internal successors, (2782), 18 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states 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 07:27:24,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:27:24,671 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:27:24,672 INFO L186 Difference]: Start difference. First operand has 264 places, 270 transitions, 1152 flow. Second operand 18 states and 2782 transitions. [2021-11-20 07:27:24,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 342 transitions, 1989 flow [2021-11-20 07:27:24,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 342 transitions, 1843 flow, removed 31 selfloop flow, removed 13 redundant places. [2021-11-20 07:27:24,714 INFO L242 Difference]: Finished difference. Result has 274 places, 285 transitions, 1339 flow [2021-11-20 07:27:24,714 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1339, PETRI_PLACES=274, PETRI_TRANSITIONS=285} [2021-11-20 07:27:24,716 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 73 predicate places. [2021-11-20 07:27:24,716 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 285 transitions, 1339 flow [2021-11-20 07:27:24,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:24,717 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:24,717 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:24,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 07:27:24,718 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:24,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:24,719 INFO L85 PathProgramCache]: Analyzing trace with hash 542987347, now seen corresponding path program 7 times [2021-11-20 07:27:24,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:24,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002253275] [2021-11-20 07:27:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:24,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:25,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:25,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002253275] [2021-11-20 07:27:25,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002253275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:25,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:25,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:25,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15853345] [2021-11-20 07:27:25,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:25,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:25,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:25,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:25,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:25,911 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:25,915 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 285 transitions, 1339 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:25,915 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:25,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:25,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:27,240 INFO L129 PetriNetUnfolder]: 1154/2808 cut-off events. [2021-11-20 07:27:27,240 INFO L130 PetriNetUnfolder]: For 6984/6999 co-relation queries the response was YES. [2021-11-20 07:27:27,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8678 conditions, 2808 events. 1154/2808 cut-off events. For 6984/6999 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20827 event pairs, 343 based on Foata normal form. 5/2696 useless extension candidates. Maximal degree in co-relation 8638. Up to 1474 conditions per place. [2021-11-20 07:27:27,297 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 160 selfloop transitions, 58 changer transitions 5/358 dead transitions. [2021-11-20 07:27:27,297 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 358 transitions, 2242 flow [2021-11-20 07:27:27,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:27:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-20 07:27:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3086 transitions. [2021-11-20 07:27:27,306 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6919282511210763 [2021-11-20 07:27:27,307 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3086 transitions. [2021-11-20 07:27:27,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3086 transitions. [2021-11-20 07:27:27,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:27,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3086 transitions. [2021-11-20 07:27:27,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.3) internal successors, (3086), 20 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states 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 07:27:27,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:27,329 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:27,330 INFO L186 Difference]: Start difference. First operand has 274 places, 285 transitions, 1339 flow. Second operand 20 states and 3086 transitions. [2021-11-20 07:27:27,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 358 transitions, 2242 flow [2021-11-20 07:27:27,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 358 transitions, 2141 flow, removed 34 selfloop flow, removed 8 redundant places. [2021-11-20 07:27:27,380 INFO L242 Difference]: Finished difference. Result has 288 places, 291 transitions, 1459 flow [2021-11-20 07:27:27,381 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1459, PETRI_PLACES=288, PETRI_TRANSITIONS=291} [2021-11-20 07:27:27,381 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 87 predicate places. [2021-11-20 07:27:27,381 INFO L470 AbstractCegarLoop]: Abstraction has has 288 places, 291 transitions, 1459 flow [2021-11-20 07:27:27,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:27,382 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:27,383 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:27,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 07:27:27,383 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:27,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:27,384 INFO L85 PathProgramCache]: Analyzing trace with hash 104146025, now seen corresponding path program 8 times [2021-11-20 07:27:27,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:27,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904379086] [2021-11-20 07:27:27,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:27,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:28,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:28,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904379086] [2021-11-20 07:27:28,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904379086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:28,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:28,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:28,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852838191] [2021-11-20 07:27:28,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:28,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:28,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:28,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:28,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:28,369 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:28,372 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 291 transitions, 1459 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:28,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:28,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:28,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:29,989 INFO L129 PetriNetUnfolder]: 1204/2977 cut-off events. [2021-11-20 07:27:29,989 INFO L130 PetriNetUnfolder]: For 9623/9637 co-relation queries the response was YES. [2021-11-20 07:27:30,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9516 conditions, 2977 events. 1204/2977 cut-off events. For 9623/9637 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 22702 event pairs, 376 based on Foata normal form. 12/2866 useless extension candidates. Maximal degree in co-relation 9472. Up to 1524 conditions per place. [2021-11-20 07:27:30,041 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 164 selfloop transitions, 62 changer transitions 5/366 dead transitions. [2021-11-20 07:27:30,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 366 transitions, 2428 flow [2021-11-20 07:27:30,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:27:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-20 07:27:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3086 transitions. [2021-11-20 07:27:30,049 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6919282511210763 [2021-11-20 07:27:30,050 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3086 transitions. [2021-11-20 07:27:30,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3086 transitions. [2021-11-20 07:27:30,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:30,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3086 transitions. [2021-11-20 07:27:30,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.3) internal successors, (3086), 20 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states 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 07:27:30,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:30,071 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:30,072 INFO L186 Difference]: Start difference. First operand has 288 places, 291 transitions, 1459 flow. Second operand 20 states and 3086 transitions. [2021-11-20 07:27:30,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 366 transitions, 2428 flow [2021-11-20 07:27:30,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 366 transitions, 2280 flow, removed 30 selfloop flow, removed 15 redundant places. [2021-11-20 07:27:30,134 INFO L242 Difference]: Finished difference. Result has 296 places, 300 transitions, 1577 flow [2021-11-20 07:27:30,135 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1577, PETRI_PLACES=296, PETRI_TRANSITIONS=300} [2021-11-20 07:27:30,136 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 95 predicate places. [2021-11-20 07:27:30,136 INFO L470 AbstractCegarLoop]: Abstraction has has 296 places, 300 transitions, 1577 flow [2021-11-20 07:27:30,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:30,137 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:30,137 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:30,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:27:30,138 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:30,139 INFO L85 PathProgramCache]: Analyzing trace with hash 454670923, now seen corresponding path program 9 times [2021-11-20 07:27:30,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:30,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029297419] [2021-11-20 07:27:30,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:30,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:30,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:30,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029297419] [2021-11-20 07:27:30,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029297419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:30,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:30,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:30,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53795326] [2021-11-20 07:27:30,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:30,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:30,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:30,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:30,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:30,910 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:30,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 300 transitions, 1577 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:30,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:30,915 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:30,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:32,548 INFO L129 PetriNetUnfolder]: 1219/3013 cut-off events. [2021-11-20 07:27:32,548 INFO L130 PetriNetUnfolder]: For 10944/10958 co-relation queries the response was YES. [2021-11-20 07:27:32,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9955 conditions, 3013 events. 1219/3013 cut-off events. For 10944/10958 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 23169 event pairs, 399 based on Foata normal form. 5/2888 useless extension candidates. Maximal degree in co-relation 9906. Up to 1637 conditions per place. [2021-11-20 07:27:32,612 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 165 selfloop transitions, 59 changer transitions 5/364 dead transitions. [2021-11-20 07:27:32,612 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 364 transitions, 2491 flow [2021-11-20 07:27:32,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:27:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-20 07:27:32,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2926 transitions. [2021-11-20 07:27:32,621 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6905829596412556 [2021-11-20 07:27:32,621 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2926 transitions. [2021-11-20 07:27:32,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2926 transitions. [2021-11-20 07:27:32,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:32,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2926 transitions. [2021-11-20 07:27:32,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 154.0) internal successors, (2926), 19 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states 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 07:27:32,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:27:32,647 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:27:32,647 INFO L186 Difference]: Start difference. First operand has 296 places, 300 transitions, 1577 flow. Second operand 19 states and 2926 transitions. [2021-11-20 07:27:32,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 364 transitions, 2491 flow [2021-11-20 07:27:32,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 364 transitions, 2329 flow, removed 36 selfloop flow, removed 14 redundant places. [2021-11-20 07:27:32,725 INFO L242 Difference]: Finished difference. Result has 302 places, 307 transitions, 1620 flow [2021-11-20 07:27:32,726 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1419, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1620, PETRI_PLACES=302, PETRI_TRANSITIONS=307} [2021-11-20 07:27:32,727 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 101 predicate places. [2021-11-20 07:27:32,727 INFO L470 AbstractCegarLoop]: Abstraction has has 302 places, 307 transitions, 1620 flow [2021-11-20 07:27:32,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:32,728 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:32,729 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:32,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:27:32,729 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1838713603, now seen corresponding path program 10 times [2021-11-20 07:27:32,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:32,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111976311] [2021-11-20 07:27:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:32,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:33,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:33,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111976311] [2021-11-20 07:27:33,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111976311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:33,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:33,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:33,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802929903] [2021-11-20 07:27:33,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:33,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:33,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:33,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:33,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:33,940 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:33,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 307 transitions, 1620 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:33,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:33,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:33,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:35,748 INFO L129 PetriNetUnfolder]: 1368/3440 cut-off events. [2021-11-20 07:27:35,749 INFO L130 PetriNetUnfolder]: For 13225/13244 co-relation queries the response was YES. [2021-11-20 07:27:35,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11498 conditions, 3440 events. 1368/3440 cut-off events. For 13225/13244 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 27889 event pairs, 490 based on Foata normal form. 9/3307 useless extension candidates. Maximal degree in co-relation 11446. Up to 1794 conditions per place. [2021-11-20 07:27:35,813 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 195 selfloop transitions, 56 changer transitions 5/391 dead transitions. [2021-11-20 07:27:35,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 391 transitions, 2783 flow [2021-11-20 07:27:35,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:27:35,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-20 07:27:35,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3090 transitions. [2021-11-20 07:27:35,820 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6928251121076233 [2021-11-20 07:27:35,820 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3090 transitions. [2021-11-20 07:27:35,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3090 transitions. [2021-11-20 07:27:35,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:35,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3090 transitions. [2021-11-20 07:27:35,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.5) internal successors, (3090), 20 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states 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 07:27:35,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:35,841 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:35,841 INFO L186 Difference]: Start difference. First operand has 302 places, 307 transitions, 1620 flow. Second operand 20 states and 3090 transitions. [2021-11-20 07:27:35,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 391 transitions, 2783 flow [2021-11-20 07:27:35,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 391 transitions, 2683 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-11-20 07:27:35,922 INFO L242 Difference]: Finished difference. Result has 315 places, 321 transitions, 1867 flow [2021-11-20 07:27:35,923 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1867, PETRI_PLACES=315, PETRI_TRANSITIONS=321} [2021-11-20 07:27:35,925 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 114 predicate places. [2021-11-20 07:27:35,925 INFO L470 AbstractCegarLoop]: Abstraction has has 315 places, 321 transitions, 1867 flow [2021-11-20 07:27:35,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:35,926 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:35,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:35,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 07:27:35,927 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:35,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1100828379, now seen corresponding path program 11 times [2021-11-20 07:27:35,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:35,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579634824] [2021-11-20 07:27:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:35,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:37,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:37,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579634824] [2021-11-20 07:27:37,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579634824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:37,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:37,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:37,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065406814] [2021-11-20 07:27:37,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:37,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:37,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:37,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:37,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:37,068 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:37,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 321 transitions, 1867 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:37,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:37,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:37,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:38,584 INFO L129 PetriNetUnfolder]: 1446/3610 cut-off events. [2021-11-20 07:27:38,584 INFO L130 PetriNetUnfolder]: For 18943/18964 co-relation queries the response was YES. [2021-11-20 07:27:38,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13074 conditions, 3610 events. 1446/3610 cut-off events. For 18943/18964 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 29570 event pairs, 538 based on Foata normal form. 11/3473 useless extension candidates. Maximal degree in co-relation 13015. Up to 2002 conditions per place. [2021-11-20 07:27:38,629 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 197 selfloop transitions, 60 changer transitions 5/397 dead transitions. [2021-11-20 07:27:38,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 397 transitions, 3051 flow [2021-11-20 07:27:38,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:27:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-20 07:27:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3085 transitions. [2021-11-20 07:27:38,635 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6917040358744395 [2021-11-20 07:27:38,636 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3085 transitions. [2021-11-20 07:27:38,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3085 transitions. [2021-11-20 07:27:38,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:38,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3085 transitions. [2021-11-20 07:27:38,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.25) internal successors, (3085), 20 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states 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 07:27:38,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:38,653 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:38,653 INFO L186 Difference]: Start difference. First operand has 315 places, 321 transitions, 1867 flow. Second operand 20 states and 3085 transitions. [2021-11-20 07:27:38,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 397 transitions, 3051 flow [2021-11-20 07:27:38,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 397 transitions, 2833 flow, removed 82 selfloop flow, removed 11 redundant places. [2021-11-20 07:27:38,779 INFO L242 Difference]: Finished difference. Result has 328 places, 336 transitions, 2042 flow [2021-11-20 07:27:38,780 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2042, PETRI_PLACES=328, PETRI_TRANSITIONS=336} [2021-11-20 07:27:38,781 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 127 predicate places. [2021-11-20 07:27:38,781 INFO L470 AbstractCegarLoop]: Abstraction has has 328 places, 336 transitions, 2042 flow [2021-11-20 07:27:38,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:38,782 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:38,783 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:38,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 07:27:38,783 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:38,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:38,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1152943459, now seen corresponding path program 12 times [2021-11-20 07:27:38,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:38,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116219244] [2021-11-20 07:27:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:38,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:39,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:39,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116219244] [2021-11-20 07:27:39,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116219244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:39,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:39,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:39,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258490461] [2021-11-20 07:27:39,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:39,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:39,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:39,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:39,722 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:39,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 336 transitions, 2042 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:39,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:39,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:39,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:41,375 INFO L129 PetriNetUnfolder]: 1497/3738 cut-off events. [2021-11-20 07:27:41,376 INFO L130 PetriNetUnfolder]: For 22851/22873 co-relation queries the response was YES. [2021-11-20 07:27:41,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13994 conditions, 3738 events. 1497/3738 cut-off events. For 22851/22873 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 31019 event pairs, 574 based on Foata normal form. 14/3602 useless extension candidates. Maximal degree in co-relation 13929. Up to 2096 conditions per place. [2021-11-20 07:27:41,455 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 210 selfloop transitions, 59 changer transitions 5/409 dead transitions. [2021-11-20 07:27:41,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 409 transitions, 3252 flow [2021-11-20 07:27:41,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:27:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-20 07:27:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3089 transitions. [2021-11-20 07:27:41,462 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6926008968609866 [2021-11-20 07:27:41,462 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3089 transitions. [2021-11-20 07:27:41,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3089 transitions. [2021-11-20 07:27:41,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:41,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3089 transitions. [2021-11-20 07:27:41,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.45) internal successors, (3089), 20 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states 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 07:27:41,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:41,480 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:41,480 INFO L186 Difference]: Start difference. First operand has 328 places, 336 transitions, 2042 flow. Second operand 20 states and 3089 transitions. [2021-11-20 07:27:41,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 409 transitions, 3252 flow [2021-11-20 07:27:41,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 409 transitions, 3033 flow, removed 68 selfloop flow, removed 13 redundant places. [2021-11-20 07:27:41,620 INFO L242 Difference]: Finished difference. Result has 337 places, 343 transitions, 2109 flow [2021-11-20 07:27:41,621 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2109, PETRI_PLACES=337, PETRI_TRANSITIONS=343} [2021-11-20 07:27:41,622 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 136 predicate places. [2021-11-20 07:27:41,622 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 343 transitions, 2109 flow [2021-11-20 07:27:41,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:41,623 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:41,624 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:41,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 07:27:41,624 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:41,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:41,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1296626565, now seen corresponding path program 13 times [2021-11-20 07:27:41,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:41,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453663461] [2021-11-20 07:27:41,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:41,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:42,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:42,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453663461] [2021-11-20 07:27:42,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453663461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:42,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:42,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:42,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391740756] [2021-11-20 07:27:42,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:42,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:42,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:42,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:42,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:42,676 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:42,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 343 transitions, 2109 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:42,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:42,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:42,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:44,576 INFO L129 PetriNetUnfolder]: 1547/3815 cut-off events. [2021-11-20 07:27:44,576 INFO L130 PetriNetUnfolder]: For 26962/26972 co-relation queries the response was YES. [2021-11-20 07:27:44,619 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14689 conditions, 3815 events. 1547/3815 cut-off events. For 26962/26972 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 31610 event pairs, 646 based on Foata normal form. 8/3660 useless extension candidates. Maximal degree in co-relation 14620. Up to 2138 conditions per place. [2021-11-20 07:27:44,759 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 212 selfloop transitions, 63 changer transitions 5/415 dead transitions. [2021-11-20 07:27:44,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 415 transitions, 3333 flow [2021-11-20 07:27:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:27:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-20 07:27:44,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3085 transitions. [2021-11-20 07:27:44,767 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6917040358744395 [2021-11-20 07:27:44,767 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3085 transitions. [2021-11-20 07:27:44,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3085 transitions. [2021-11-20 07:27:44,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:44,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3085 transitions. [2021-11-20 07:27:44,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.25) internal successors, (3085), 20 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states 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 07:27:44,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:44,787 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states 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 07:27:44,787 INFO L186 Difference]: Start difference. First operand has 337 places, 343 transitions, 2109 flow. Second operand 20 states and 3085 transitions. [2021-11-20 07:27:44,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 415 transitions, 3333 flow [2021-11-20 07:27:44,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 415 transitions, 3150 flow, removed 48 selfloop flow, removed 15 redundant places. [2021-11-20 07:27:44,953 INFO L242 Difference]: Finished difference. Result has 345 places, 352 transitions, 2236 flow [2021-11-20 07:27:44,953 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1928, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2236, PETRI_PLACES=345, PETRI_TRANSITIONS=352} [2021-11-20 07:27:44,954 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 144 predicate places. [2021-11-20 07:27:44,954 INFO L470 AbstractCegarLoop]: Abstraction has has 345 places, 352 transitions, 2236 flow [2021-11-20 07:27:44,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:44,955 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:44,956 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:44,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 07:27:44,956 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:44,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:44,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1909271909, now seen corresponding path program 14 times [2021-11-20 07:27:44,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:44,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917403524] [2021-11-20 07:27:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:44,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:45,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:45,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917403524] [2021-11-20 07:27:45,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917403524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:45,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:45,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:45,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305224545] [2021-11-20 07:27:45,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:45,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:45,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:45,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:45,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:45,817 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:45,820 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 352 transitions, 2236 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:45,820 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:45,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:45,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:47,418 INFO L129 PetriNetUnfolder]: 1574/3850 cut-off events. [2021-11-20 07:27:47,418 INFO L130 PetriNetUnfolder]: For 28778/28786 co-relation queries the response was YES. [2021-11-20 07:27:47,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15286 conditions, 3850 events. 1574/3850 cut-off events. For 28778/28786 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31764 event pairs, 833 based on Foata normal form. 1/3702 useless extension candidates. Maximal degree in co-relation 15212. Up to 2254 conditions per place. [2021-11-20 07:27:47,525 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 216 selfloop transitions, 63 changer transitions 5/419 dead transitions. [2021-11-20 07:27:47,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 419 transitions, 3455 flow [2021-11-20 07:27:47,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:27:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-20 07:27:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2931 transitions. [2021-11-20 07:27:47,531 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6917630398867123 [2021-11-20 07:27:47,531 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2931 transitions. [2021-11-20 07:27:47,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2931 transitions. [2021-11-20 07:27:47,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:47,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2931 transitions. [2021-11-20 07:27:47,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 154.26315789473685) internal successors, (2931), 19 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states 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 07:27:47,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:27:47,545 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:27:47,545 INFO L186 Difference]: Start difference. First operand has 345 places, 352 transitions, 2236 flow. Second operand 19 states and 2931 transitions. [2021-11-20 07:27:47,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 419 transitions, 3455 flow [2021-11-20 07:27:47,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 419 transitions, 3247 flow, removed 57 selfloop flow, removed 14 redundant places. [2021-11-20 07:27:47,701 INFO L242 Difference]: Finished difference. Result has 351 places, 362 transitions, 2309 flow [2021-11-20 07:27:47,701 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2309, PETRI_PLACES=351, PETRI_TRANSITIONS=362} [2021-11-20 07:27:47,702 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 150 predicate places. [2021-11-20 07:27:47,702 INFO L470 AbstractCegarLoop]: Abstraction has has 351 places, 362 transitions, 2309 flow [2021-11-20 07:27:47,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:47,703 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:47,703 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:47,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 07:27:47,704 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1863188807, now seen corresponding path program 15 times [2021-11-20 07:27:47,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:47,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826934451] [2021-11-20 07:27:47,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:47,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:48,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:48,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826934451] [2021-11-20 07:27:48,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826934451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:48,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:48,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:48,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987164014] [2021-11-20 07:27:48,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:48,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:48,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:48,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:48,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:48,517 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:48,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 362 transitions, 2309 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:48,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:48,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:48,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:50,072 INFO L129 PetriNetUnfolder]: 1584/3983 cut-off events. [2021-11-20 07:27:50,072 INFO L130 PetriNetUnfolder]: For 28176/28197 co-relation queries the response was YES. [2021-11-20 07:27:50,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15509 conditions, 3983 events. 1584/3983 cut-off events. For 28176/28197 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33856 event pairs, 659 based on Foata normal form. 11/3823 useless extension candidates. Maximal degree in co-relation 15432. Up to 2270 conditions per place. [2021-11-20 07:27:50,122 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 216 selfloop transitions, 57 changer transitions 5/413 dead transitions. [2021-11-20 07:27:50,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 413 transitions, 3422 flow [2021-11-20 07:27:50,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:27:50,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:27:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2765 transitions. [2021-11-20 07:27:50,127 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6888390632785252 [2021-11-20 07:27:50,127 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2765 transitions. [2021-11-20 07:27:50,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2765 transitions. [2021-11-20 07:27:50,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:50,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2765 transitions. [2021-11-20 07:27:50,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.61111111111111) internal successors, (2765), 18 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states 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 07:27:50,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:27:50,140 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:27:50,141 INFO L186 Difference]: Start difference. First operand has 351 places, 362 transitions, 2309 flow. Second operand 18 states and 2765 transitions. [2021-11-20 07:27:50,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 413 transitions, 3422 flow [2021-11-20 07:27:50,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 413 transitions, 3291 flow, removed 22 selfloop flow, removed 12 redundant places. [2021-11-20 07:27:50,296 INFO L242 Difference]: Finished difference. Result has 358 places, 370 transitions, 2465 flow [2021-11-20 07:27:50,297 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2465, PETRI_PLACES=358, PETRI_TRANSITIONS=370} [2021-11-20 07:27:50,297 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 157 predicate places. [2021-11-20 07:27:50,298 INFO L470 AbstractCegarLoop]: Abstraction has has 358 places, 370 transitions, 2465 flow [2021-11-20 07:27:50,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:50,299 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:50,299 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:50,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 07:27:50,299 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:50,300 INFO L85 PathProgramCache]: Analyzing trace with hash 801206073, now seen corresponding path program 16 times [2021-11-20 07:27:50,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:50,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847283602] [2021-11-20 07:27:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:50,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:51,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:51,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847283602] [2021-11-20 07:27:51,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847283602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:51,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:51,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:51,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872014303] [2021-11-20 07:27:51,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:51,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:51,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:51,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:51,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:51,175 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:51,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 370 transitions, 2465 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:51,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:51,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:51,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:52,977 INFO L129 PetriNetUnfolder]: 1626/4034 cut-off events. [2021-11-20 07:27:52,978 INFO L130 PetriNetUnfolder]: For 34052/34055 co-relation queries the response was YES. [2021-11-20 07:27:53,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16300 conditions, 4034 events. 1626/4034 cut-off events. For 34052/34055 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33687 event pairs, 870 based on Foata normal form. 1/3871 useless extension candidates. Maximal degree in co-relation 16221. Up to 2285 conditions per place. [2021-11-20 07:27:53,028 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 229 selfloop transitions, 62 changer transitions 5/431 dead transitions. [2021-11-20 07:27:53,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 431 transitions, 3741 flow [2021-11-20 07:27:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:27:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:27:53,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2779 transitions. [2021-11-20 07:27:53,036 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.692326856003986 [2021-11-20 07:27:53,036 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2779 transitions. [2021-11-20 07:27:53,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2779 transitions. [2021-11-20 07:27:53,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:53,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2779 transitions. [2021-11-20 07:27:53,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.38888888888889) internal successors, (2779), 18 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states 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 07:27:53,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:27:53,050 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:27:53,050 INFO L186 Difference]: Start difference. First operand has 358 places, 370 transitions, 2465 flow. Second operand 18 states and 2779 transitions. [2021-11-20 07:27:53,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 431 transitions, 3741 flow [2021-11-20 07:27:53,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 431 transitions, 3564 flow, removed 54 selfloop flow, removed 11 redundant places. [2021-11-20 07:27:53,221 INFO L242 Difference]: Finished difference. Result has 367 places, 376 transitions, 2621 flow [2021-11-20 07:27:53,222 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2294, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2621, PETRI_PLACES=367, PETRI_TRANSITIONS=376} [2021-11-20 07:27:53,223 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 166 predicate places. [2021-11-20 07:27:53,223 INFO L470 AbstractCegarLoop]: Abstraction has has 367 places, 376 transitions, 2621 flow [2021-11-20 07:27:53,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:53,224 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:53,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:53,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 07:27:53,225 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:53,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:53,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1173989885, now seen corresponding path program 17 times [2021-11-20 07:27:53,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:53,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247294842] [2021-11-20 07:27:53,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:53,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:54,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:54,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247294842] [2021-11-20 07:27:54,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247294842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:54,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:54,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:54,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087582259] [2021-11-20 07:27:54,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:54,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:54,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:54,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:54,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:54,158 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:54,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 376 transitions, 2621 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:54,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:54,162 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:54,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:55,848 INFO L129 PetriNetUnfolder]: 1677/4260 cut-off events. [2021-11-20 07:27:55,848 INFO L130 PetriNetUnfolder]: For 43016/43037 co-relation queries the response was YES. [2021-11-20 07:27:56,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17676 conditions, 4260 events. 1677/4260 cut-off events. For 43016/43037 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 37010 event pairs, 700 based on Foata normal form. 11/4093 useless extension candidates. Maximal degree in co-relation 17593. Up to 2380 conditions per place. [2021-11-20 07:27:56,049 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 238 selfloop transitions, 61 changer transitions 5/439 dead transitions. [2021-11-20 07:27:56,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 439 transitions, 3965 flow [2021-11-20 07:27:56,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:27:56,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:27:56,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2781 transitions. [2021-11-20 07:27:56,053 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6928251121076233 [2021-11-20 07:27:56,053 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2781 transitions. [2021-11-20 07:27:56,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2781 transitions. [2021-11-20 07:27:56,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:56,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2781 transitions. [2021-11-20 07:27:56,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.5) internal successors, (2781), 18 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states 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 07:27:56,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:27:56,066 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:27:56,066 INFO L186 Difference]: Start difference. First operand has 367 places, 376 transitions, 2621 flow. Second operand 18 states and 2781 transitions. [2021-11-20 07:27:56,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 439 transitions, 3965 flow [2021-11-20 07:27:56,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 439 transitions, 3728 flow, removed 76 selfloop flow, removed 13 redundant places. [2021-11-20 07:27:56,244 INFO L242 Difference]: Finished difference. Result has 374 places, 383 transitions, 2732 flow [2021-11-20 07:27:56,245 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2395, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2732, PETRI_PLACES=374, PETRI_TRANSITIONS=383} [2021-11-20 07:27:56,245 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 173 predicate places. [2021-11-20 07:27:56,245 INFO L470 AbstractCegarLoop]: Abstraction has has 374 places, 383 transitions, 2732 flow [2021-11-20 07:27:56,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:56,246 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:56,246 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:56,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 07:27:56,247 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:56,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:56,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1090035231, now seen corresponding path program 18 times [2021-11-20 07:27:56,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:56,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734792836] [2021-11-20 07:27:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:56,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:57,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:57,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734792836] [2021-11-20 07:27:57,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734792836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:57,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:57,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:27:57,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343407715] [2021-11-20 07:27:57,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:57,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:57,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:57,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:57,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:57,091 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:27:57,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 383 transitions, 2732 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:57,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:27:57,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:27:57,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:27:59,151 INFO L129 PetriNetUnfolder]: 1689/4206 cut-off events. [2021-11-20 07:27:59,151 INFO L130 PetriNetUnfolder]: For 45364/45372 co-relation queries the response was YES. [2021-11-20 07:27:59,190 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17902 conditions, 4206 events. 1689/4206 cut-off events. For 45364/45372 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 35862 event pairs, 904 based on Foata normal form. 1/4032 useless extension candidates. Maximal degree in co-relation 17815. Up to 2431 conditions per place. [2021-11-20 07:27:59,210 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 233 selfloop transitions, 66 changer transitions 5/439 dead transitions. [2021-11-20 07:27:59,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 439 transitions, 3985 flow [2021-11-20 07:27:59,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:27:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:27:59,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2774 transitions. [2021-11-20 07:27:59,214 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6910812157448929 [2021-11-20 07:27:59,215 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2774 transitions. [2021-11-20 07:27:59,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2774 transitions. [2021-11-20 07:27:59,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:27:59,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2774 transitions. [2021-11-20 07:27:59,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.11111111111111) internal successors, (2774), 18 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states 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 07:27:59,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:27:59,227 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:27:59,227 INFO L186 Difference]: Start difference. First operand has 374 places, 383 transitions, 2732 flow. Second operand 18 states and 2774 transitions. [2021-11-20 07:27:59,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 439 transitions, 3985 flow [2021-11-20 07:27:59,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 439 transitions, 3789 flow, removed 68 selfloop flow, removed 12 redundant places. [2021-11-20 07:27:59,418 INFO L242 Difference]: Finished difference. Result has 382 places, 391 transitions, 2853 flow [2021-11-20 07:27:59,419 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2853, PETRI_PLACES=382, PETRI_TRANSITIONS=391} [2021-11-20 07:27:59,419 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 181 predicate places. [2021-11-20 07:27:59,420 INFO L470 AbstractCegarLoop]: Abstraction has has 382 places, 391 transitions, 2853 flow [2021-11-20 07:27:59,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:27:59,420 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:27:59,420 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:59,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 07:27:59,421 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:27:59,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:59,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2052744373, now seen corresponding path program 19 times [2021-11-20 07:27:59,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:59,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693685883] [2021-11-20 07:27:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:59,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:00,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:00,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693685883] [2021-11-20 07:28:00,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693685883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:00,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:00,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:00,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265501632] [2021-11-20 07:28:00,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:00,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:00,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:00,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:00,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:00,299 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:00,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 391 transitions, 2853 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:00,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:00,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:00,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:02,192 INFO L129 PetriNetUnfolder]: 1697/4228 cut-off events. [2021-11-20 07:28:02,192 INFO L130 PetriNetUnfolder]: For 45629/45637 co-relation queries the response was YES. [2021-11-20 07:28:02,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18064 conditions, 4228 events. 1697/4228 cut-off events. For 45629/45637 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 36032 event pairs, 878 based on Foata normal form. 6/4067 useless extension candidates. Maximal degree in co-relation 17973. Up to 2421 conditions per place. [2021-11-20 07:28:02,251 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 238 selfloop transitions, 66 changer transitions 5/444 dead transitions. [2021-11-20 07:28:02,252 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 444 transitions, 4090 flow [2021-11-20 07:28:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:28:02,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:28:02,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2770 transitions. [2021-11-20 07:28:02,256 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6900847035376183 [2021-11-20 07:28:02,257 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2770 transitions. [2021-11-20 07:28:02,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2770 transitions. [2021-11-20 07:28:02,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:02,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2770 transitions. [2021-11-20 07:28:02,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.88888888888889) internal successors, (2770), 18 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states 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 07:28:02,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:02,269 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:02,269 INFO L186 Difference]: Start difference. First operand has 382 places, 391 transitions, 2853 flow. Second operand 18 states and 2770 transitions. [2021-11-20 07:28:02,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 444 transitions, 4090 flow [2021-11-20 07:28:02,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 444 transitions, 3868 flow, removed 51 selfloop flow, removed 14 redundant places. [2021-11-20 07:28:02,472 INFO L242 Difference]: Finished difference. Result has 388 places, 397 transitions, 2910 flow [2021-11-20 07:28:02,473 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2910, PETRI_PLACES=388, PETRI_TRANSITIONS=397} [2021-11-20 07:28:02,474 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 187 predicate places. [2021-11-20 07:28:02,474 INFO L470 AbstractCegarLoop]: Abstraction has has 388 places, 397 transitions, 2910 flow [2021-11-20 07:28:02,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:02,474 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:02,474 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:02,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 07:28:02,475 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:02,475 INFO L85 PathProgramCache]: Analyzing trace with hash 582150627, now seen corresponding path program 20 times [2021-11-20 07:28:02,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:02,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090852555] [2021-11-20 07:28:02,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:02,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:03,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:03,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090852555] [2021-11-20 07:28:03,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090852555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:03,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:03,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:03,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446987345] [2021-11-20 07:28:03,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:03,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:03,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:03,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:03,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:03,240 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:03,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 397 transitions, 2910 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:03,242 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:03,242 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:03,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:05,160 INFO L129 PetriNetUnfolder]: 1697/4254 cut-off events. [2021-11-20 07:28:05,160 INFO L130 PetriNetUnfolder]: For 47563/47571 co-relation queries the response was YES. [2021-11-20 07:28:05,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18103 conditions, 4254 events. 1697/4254 cut-off events. For 47563/47571 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 36816 event pairs, 769 based on Foata normal form. 5/4075 useless extension candidates. Maximal degree in co-relation 18009. Up to 2429 conditions per place. [2021-11-20 07:28:05,219 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 242 selfloop transitions, 63 changer transitions 5/445 dead transitions. [2021-11-20 07:28:05,219 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 445 transitions, 4091 flow [2021-11-20 07:28:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:28:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:28:05,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2768 transitions. [2021-11-20 07:28:05,223 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6895864474339811 [2021-11-20 07:28:05,223 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2768 transitions. [2021-11-20 07:28:05,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2768 transitions. [2021-11-20 07:28:05,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:05,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2768 transitions. [2021-11-20 07:28:05,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.77777777777777) internal successors, (2768), 18 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states 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 07:28:05,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:05,235 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:05,235 INFO L186 Difference]: Start difference. First operand has 388 places, 397 transitions, 2910 flow. Second operand 18 states and 2768 transitions. [2021-11-20 07:28:05,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 445 transitions, 4091 flow [2021-11-20 07:28:05,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 445 transitions, 3835 flow, removed 49 selfloop flow, removed 15 redundant places. [2021-11-20 07:28:05,523 INFO L242 Difference]: Finished difference. Result has 392 places, 400 transitions, 2851 flow [2021-11-20 07:28:05,524 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2851, PETRI_PLACES=392, PETRI_TRANSITIONS=400} [2021-11-20 07:28:05,525 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 191 predicate places. [2021-11-20 07:28:05,525 INFO L470 AbstractCegarLoop]: Abstraction has has 392 places, 400 transitions, 2851 flow [2021-11-20 07:28:05,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:05,525 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:05,526 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:05,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 07:28:05,526 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:05,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:05,527 INFO L85 PathProgramCache]: Analyzing trace with hash 6921955, now seen corresponding path program 21 times [2021-11-20 07:28:05,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:05,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070127479] [2021-11-20 07:28:05,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:05,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:06,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:06,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070127479] [2021-11-20 07:28:06,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070127479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:06,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:06,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:06,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990796743] [2021-11-20 07:28:06,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:06,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:06,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:06,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:06,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:06,161 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:06,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 400 transitions, 2851 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:06,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:06,164 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:06,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:07,927 INFO L129 PetriNetUnfolder]: 1703/4296 cut-off events. [2021-11-20 07:28:07,927 INFO L130 PetriNetUnfolder]: For 47561/47569 co-relation queries the response was YES. [2021-11-20 07:28:08,015 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17997 conditions, 4296 events. 1703/4296 cut-off events. For 47561/47569 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 37422 event pairs, 774 based on Foata normal form. 5/4112 useless extension candidates. Maximal degree in co-relation 17902. Up to 2453 conditions per place. [2021-11-20 07:28:08,041 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 248 selfloop transitions, 63 changer transitions 5/451 dead transitions. [2021-11-20 07:28:08,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 451 transitions, 4080 flow [2021-11-20 07:28:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:28:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:28:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2772 transitions. [2021-11-20 07:28:08,046 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6905829596412556 [2021-11-20 07:28:08,046 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2772 transitions. [2021-11-20 07:28:08,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2772 transitions. [2021-11-20 07:28:08,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:08,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2772 transitions. [2021-11-20 07:28:08,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.0) internal successors, (2772), 18 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:08,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:08,060 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:08,060 INFO L186 Difference]: Start difference. First operand has 392 places, 400 transitions, 2851 flow. Second operand 18 states and 2772 transitions. [2021-11-20 07:28:08,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 451 transitions, 4080 flow [2021-11-20 07:28:08,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 451 transitions, 3890 flow, removed 33 selfloop flow, removed 15 redundant places. [2021-11-20 07:28:08,387 INFO L242 Difference]: Finished difference. Result has 396 places, 404 transitions, 2878 flow [2021-11-20 07:28:08,387 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2665, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2878, PETRI_PLACES=396, PETRI_TRANSITIONS=404} [2021-11-20 07:28:08,388 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 195 predicate places. [2021-11-20 07:28:08,388 INFO L470 AbstractCegarLoop]: Abstraction has has 396 places, 404 transitions, 2878 flow [2021-11-20 07:28:08,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:08,388 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:08,388 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:08,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 07:28:08,389 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:08,389 INFO L85 PathProgramCache]: Analyzing trace with hash -592227011, now seen corresponding path program 22 times [2021-11-20 07:28:08,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:08,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425179705] [2021-11-20 07:28:08,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:08,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:09,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:09,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425179705] [2021-11-20 07:28:09,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425179705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:09,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:09,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:09,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956938178] [2021-11-20 07:28:09,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:09,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:09,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:09,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:09,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:09,115 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:09,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 404 transitions, 2878 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:09,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:09,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:09,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:10,755 INFO L129 PetriNetUnfolder]: 1703/4328 cut-off events. [2021-11-20 07:28:10,756 INFO L130 PetriNetUnfolder]: For 47800/47822 co-relation queries the response was YES. [2021-11-20 07:28:10,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18016 conditions, 4328 events. 1703/4328 cut-off events. For 47800/47822 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 38144 event pairs, 698 based on Foata normal form. 14/4162 useless extension candidates. Maximal degree in co-relation 17919. Up to 2449 conditions per place. [2021-11-20 07:28:10,818 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 249 selfloop transitions, 62 changer transitions 5/451 dead transitions. [2021-11-20 07:28:10,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 451 transitions, 4071 flow [2021-11-20 07:28:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:28:10,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:28:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2767 transitions. [2021-11-20 07:28:10,823 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6893373193821625 [2021-11-20 07:28:10,823 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2767 transitions. [2021-11-20 07:28:10,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2767 transitions. [2021-11-20 07:28:10,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:10,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2767 transitions. [2021-11-20 07:28:10,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.72222222222223) internal successors, (2767), 18 states have internal predecessors, (2767), 0 states have call successors, (0), 0 states 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 07:28:10,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:10,835 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:10,835 INFO L186 Difference]: Start difference. First operand has 396 places, 404 transitions, 2878 flow. Second operand 18 states and 2767 transitions. [2021-11-20 07:28:10,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 451 transitions, 4071 flow [2021-11-20 07:28:11,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 451 transitions, 3879 flow, removed 33 selfloop flow, removed 15 redundant places. [2021-11-20 07:28:11,055 INFO L242 Difference]: Finished difference. Result has 400 places, 407 transitions, 2866 flow [2021-11-20 07:28:11,056 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2866, PETRI_PLACES=400, PETRI_TRANSITIONS=407} [2021-11-20 07:28:11,056 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 199 predicate places. [2021-11-20 07:28:11,056 INFO L470 AbstractCegarLoop]: Abstraction has has 400 places, 407 transitions, 2866 flow [2021-11-20 07:28:11,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:11,057 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:11,057 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:11,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 07:28:11,057 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:11,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1261167903, now seen corresponding path program 23 times [2021-11-20 07:28:11,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:11,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898549701] [2021-11-20 07:28:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:11,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:12,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:12,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898549701] [2021-11-20 07:28:12,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898549701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:12,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:12,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:12,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089587200] [2021-11-20 07:28:12,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:12,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:12,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:12,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:12,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:12,036 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:12,038 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 407 transitions, 2866 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:12,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:12,038 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:12,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:13,791 INFO L129 PetriNetUnfolder]: 1756/4488 cut-off events. [2021-11-20 07:28:13,791 INFO L130 PetriNetUnfolder]: For 51438/51458 co-relation queries the response was YES. [2021-11-20 07:28:13,849 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18733 conditions, 4488 events. 1756/4488 cut-off events. For 51438/51458 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39712 event pairs, 715 based on Foata normal form. 9/4304 useless extension candidates. Maximal degree in co-relation 18634. Up to 2450 conditions per place. [2021-11-20 07:28:13,869 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 259 selfloop transitions, 75 changer transitions 5/474 dead transitions. [2021-11-20 07:28:13,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 474 transitions, 4414 flow [2021-11-20 07:28:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:28:13,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-20 07:28:13,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2928 transitions. [2021-11-20 07:28:13,873 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6910549917394383 [2021-11-20 07:28:13,873 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2928 transitions. [2021-11-20 07:28:13,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2928 transitions. [2021-11-20 07:28:13,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:13,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2928 transitions. [2021-11-20 07:28:13,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 154.10526315789474) internal successors, (2928), 19 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states 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 07:28:13,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:28:13,882 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:28:13,883 INFO L186 Difference]: Start difference. First operand has 400 places, 407 transitions, 2866 flow. Second operand 19 states and 2928 transitions. [2021-11-20 07:28:13,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 474 transitions, 4414 flow [2021-11-20 07:28:14,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 474 transitions, 4315 flow, removed 4 selfloop flow, removed 14 redundant places. [2021-11-20 07:28:14,085 INFO L242 Difference]: Finished difference. Result has 408 places, 420 transitions, 3274 flow [2021-11-20 07:28:14,086 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2769, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3274, PETRI_PLACES=408, PETRI_TRANSITIONS=420} [2021-11-20 07:28:14,086 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 207 predicate places. [2021-11-20 07:28:14,086 INFO L470 AbstractCegarLoop]: Abstraction has has 408 places, 420 transitions, 3274 flow [2021-11-20 07:28:14,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:14,087 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:14,088 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:14,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 07:28:14,088 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:14,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:14,089 INFO L85 PathProgramCache]: Analyzing trace with hash -328228007, now seen corresponding path program 24 times [2021-11-20 07:28:14,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:14,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380987417] [2021-11-20 07:28:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:14,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:14,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:14,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380987417] [2021-11-20 07:28:14,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380987417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:14,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:14,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:14,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386348403] [2021-11-20 07:28:14,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:14,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:14,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:14,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:14,931 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:14,934 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 420 transitions, 3274 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:14,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:14,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:14,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:16,757 INFO L129 PetriNetUnfolder]: 1798/4489 cut-off events. [2021-11-20 07:28:16,758 INFO L130 PetriNetUnfolder]: For 64362/64370 co-relation queries the response was YES. [2021-11-20 07:28:16,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19945 conditions, 4489 events. 1798/4489 cut-off events. For 64362/64370 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 39100 event pairs, 921 based on Foata normal form. 1/4319 useless extension candidates. Maximal degree in co-relation 19842. Up to 2478 conditions per place. [2021-11-20 07:28:16,829 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 265 selfloop transitions, 79 changer transitions 5/484 dead transitions. [2021-11-20 07:28:16,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 484 transitions, 4882 flow [2021-11-20 07:28:16,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:28:16,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-20 07:28:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2930 transitions. [2021-11-20 07:28:16,832 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.691527023837621 [2021-11-20 07:28:16,832 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2930 transitions. [2021-11-20 07:28:16,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2930 transitions. [2021-11-20 07:28:16,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:16,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2930 transitions. [2021-11-20 07:28:16,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 154.21052631578948) internal successors, (2930), 19 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states 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 07:28:16,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:28:16,841 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:28:16,841 INFO L186 Difference]: Start difference. First operand has 408 places, 420 transitions, 3274 flow. Second operand 19 states and 2930 transitions. [2021-11-20 07:28:16,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 484 transitions, 4882 flow [2021-11-20 07:28:17,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 484 transitions, 4555 flow, removed 119 selfloop flow, removed 12 redundant places. [2021-11-20 07:28:17,125 INFO L242 Difference]: Finished difference. Result has 417 places, 426 transitions, 3377 flow [2021-11-20 07:28:17,126 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2953, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3377, PETRI_PLACES=417, PETRI_TRANSITIONS=426} [2021-11-20 07:28:17,127 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 216 predicate places. [2021-11-20 07:28:17,127 INFO L470 AbstractCegarLoop]: Abstraction has has 417 places, 426 transitions, 3377 flow [2021-11-20 07:28:17,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:17,128 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:17,128 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:17,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 07:28:17,129 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:17,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:17,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1225869959, now seen corresponding path program 25 times [2021-11-20 07:28:17,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:17,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893372719] [2021-11-20 07:28:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:17,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:17,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:17,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893372719] [2021-11-20 07:28:17,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893372719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:17,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:17,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:17,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548881938] [2021-11-20 07:28:17,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:17,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:17,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:17,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:17,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:17,995 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:17,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 426 transitions, 3377 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:17,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:17,998 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:17,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:20,149 INFO L129 PetriNetUnfolder]: 1870/4705 cut-off events. [2021-11-20 07:28:20,149 INFO L130 PetriNetUnfolder]: For 74235/74249 co-relation queries the response was YES. [2021-11-20 07:28:20,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21198 conditions, 4705 events. 1870/4705 cut-off events. For 74235/74249 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 41948 event pairs, 880 based on Foata normal form. 6/4525 useless extension candidates. Maximal degree in co-relation 21091. Up to 2653 conditions per place. [2021-11-20 07:28:20,234 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 285 selfloop transitions, 70 changer transitions 5/495 dead transitions. [2021-11-20 07:28:20,235 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 495 transitions, 5090 flow [2021-11-20 07:28:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:28:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-20 07:28:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2930 transitions. [2021-11-20 07:28:20,239 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.691527023837621 [2021-11-20 07:28:20,239 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2930 transitions. [2021-11-20 07:28:20,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2930 transitions. [2021-11-20 07:28:20,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:20,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2930 transitions. [2021-11-20 07:28:20,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 154.21052631578948) internal successors, (2930), 19 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states 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 07:28:20,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:28:20,250 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:28:20,251 INFO L186 Difference]: Start difference. First operand has 417 places, 426 transitions, 3377 flow. Second operand 19 states and 2930 transitions. [2021-11-20 07:28:20,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 495 transitions, 5090 flow [2021-11-20 07:28:20,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 495 transitions, 4790 flow, removed 98 selfloop flow, removed 15 redundant places. [2021-11-20 07:28:20,581 INFO L242 Difference]: Finished difference. Result has 425 places, 437 transitions, 3516 flow [2021-11-20 07:28:20,581 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=3086, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3516, PETRI_PLACES=425, PETRI_TRANSITIONS=437} [2021-11-20 07:28:20,582 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 224 predicate places. [2021-11-20 07:28:20,582 INFO L470 AbstractCegarLoop]: Abstraction has has 425 places, 437 transitions, 3516 flow [2021-11-20 07:28:20,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:20,583 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:20,583 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:20,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 07:28:20,584 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash 524014679, now seen corresponding path program 26 times [2021-11-20 07:28:20,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:20,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307962678] [2021-11-20 07:28:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:20,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:21,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:21,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307962678] [2021-11-20 07:28:21,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307962678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:21,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:21,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:21,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080156130] [2021-11-20 07:28:21,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:21,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:21,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:21,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:21,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:21,335 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:21,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 437 transitions, 3516 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:21,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:21,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:21,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:23,321 INFO L129 PetriNetUnfolder]: 1870/4785 cut-off events. [2021-11-20 07:28:23,321 INFO L130 PetriNetUnfolder]: For 72699/72719 co-relation queries the response was YES. [2021-11-20 07:28:23,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21224 conditions, 4785 events. 1870/4785 cut-off events. For 72699/72719 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 43323 event pairs, 789 based on Foata normal form. 9/4594 useless extension candidates. Maximal degree in co-relation 21112. Up to 2699 conditions per place. [2021-11-20 07:28:23,423 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 277 selfloop transitions, 71 changer transitions 5/488 dead transitions. [2021-11-20 07:28:23,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 488 transitions, 4887 flow [2021-11-20 07:28:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:28:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:28:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2770 transitions. [2021-11-20 07:28:23,425 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6900847035376183 [2021-11-20 07:28:23,425 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2770 transitions. [2021-11-20 07:28:23,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2770 transitions. [2021-11-20 07:28:23,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:23,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2770 transitions. [2021-11-20 07:28:23,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.88888888888889) internal successors, (2770), 18 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states 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 07:28:23,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:23,432 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:23,432 INFO L186 Difference]: Start difference. First operand has 425 places, 437 transitions, 3516 flow. Second operand 18 states and 2770 transitions. [2021-11-20 07:28:23,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 488 transitions, 4887 flow [2021-11-20 07:28:23,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 488 transitions, 4627 flow, removed 100 selfloop flow, removed 11 redundant places. [2021-11-20 07:28:23,953 INFO L242 Difference]: Finished difference. Result has 433 places, 440 transitions, 3487 flow [2021-11-20 07:28:23,954 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3487, PETRI_PLACES=433, PETRI_TRANSITIONS=440} [2021-11-20 07:28:23,958 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 232 predicate places. [2021-11-20 07:28:23,958 INFO L470 AbstractCegarLoop]: Abstraction has has 433 places, 440 transitions, 3487 flow [2021-11-20 07:28:23,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:23,959 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:23,959 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:23,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-20 07:28:23,959 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:23,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:23,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1567208425, now seen corresponding path program 27 times [2021-11-20 07:28:23,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:23,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129347613] [2021-11-20 07:28:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:23,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:24,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:24,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129347613] [2021-11-20 07:28:24,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129347613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:24,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:24,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:24,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210414970] [2021-11-20 07:28:24,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:24,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:24,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:24,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:24,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:24,610 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:24,612 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 440 transitions, 3487 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:24,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:24,612 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:24,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:26,602 INFO L129 PetriNetUnfolder]: 1880/4815 cut-off events. [2021-11-20 07:28:26,602 INFO L130 PetriNetUnfolder]: For 67283/67303 co-relation queries the response was YES. [2021-11-20 07:28:26,676 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21167 conditions, 4815 events. 1880/4815 cut-off events. For 67283/67303 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 43748 event pairs, 814 based on Foata normal form. 9/4617 useless extension candidates. Maximal degree in co-relation 21052. Up to 2743 conditions per place. [2021-11-20 07:28:26,700 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 283 selfloop transitions, 68 changer transitions 5/491 dead transitions. [2021-11-20 07:28:26,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 491 transitions, 5016 flow [2021-11-20 07:28:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:28:26,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:28:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2766 transitions. [2021-11-20 07:28:26,703 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6890881913303438 [2021-11-20 07:28:26,703 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2766 transitions. [2021-11-20 07:28:26,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2766 transitions. [2021-11-20 07:28:26,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:26,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2766 transitions. [2021-11-20 07:28:26,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.66666666666666) internal successors, (2766), 18 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states 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 07:28:26,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:26,709 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:26,709 INFO L186 Difference]: Start difference. First operand has 433 places, 440 transitions, 3487 flow. Second operand 18 states and 2766 transitions. [2021-11-20 07:28:26,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 491 transitions, 5016 flow [2021-11-20 07:28:27,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 491 transitions, 4778 flow, removed 45 selfloop flow, removed 15 redundant places. [2021-11-20 07:28:27,066 INFO L242 Difference]: Finished difference. Result has 437 places, 448 transitions, 3640 flow [2021-11-20 07:28:27,067 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=3259, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3640, PETRI_PLACES=437, PETRI_TRANSITIONS=448} [2021-11-20 07:28:27,067 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 236 predicate places. [2021-11-20 07:28:27,068 INFO L470 AbstractCegarLoop]: Abstraction has has 437 places, 448 transitions, 3640 flow [2021-11-20 07:28:27,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:27,068 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:27,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:27,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-20 07:28:27,069 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:27,070 INFO L85 PathProgramCache]: Analyzing trace with hash -642381331, now seen corresponding path program 28 times [2021-11-20 07:28:27,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:27,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490836945] [2021-11-20 07:28:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:27,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:27,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:27,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490836945] [2021-11-20 07:28:27,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490836945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:27,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:27,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:27,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939393972] [2021-11-20 07:28:27,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:27,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:27,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:27,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:27,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:27,912 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:27,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 448 transitions, 3640 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:27,915 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:27,915 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:27,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:30,374 INFO L129 PetriNetUnfolder]: 1920/4941 cut-off events. [2021-11-20 07:28:30,374 INFO L130 PetriNetUnfolder]: For 77096/77118 co-relation queries the response was YES. [2021-11-20 07:28:30,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21995 conditions, 4941 events. 1920/4941 cut-off events. For 77096/77118 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 45445 event pairs, 776 based on Foata normal form. 14/4747 useless extension candidates. Maximal degree in co-relation 21879. Up to 2705 conditions per place. [2021-11-20 07:28:30,453 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 296 selfloop transitions, 78 changer transitions 5/514 dead transitions. [2021-11-20 07:28:30,453 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 514 transitions, 5292 flow [2021-11-20 07:28:30,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:28:30,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-20 07:28:30,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2930 transitions. [2021-11-20 07:28:30,456 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.691527023837621 [2021-11-20 07:28:30,456 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2930 transitions. [2021-11-20 07:28:30,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2930 transitions. [2021-11-20 07:28:30,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:30,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2930 transitions. [2021-11-20 07:28:30,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 154.21052631578948) internal successors, (2930), 19 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states 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 07:28:30,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:28:30,466 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:28:30,466 INFO L186 Difference]: Start difference. First operand has 437 places, 448 transitions, 3640 flow. Second operand 19 states and 2930 transitions. [2021-11-20 07:28:30,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 514 transitions, 5292 flow [2021-11-20 07:28:30,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 514 transitions, 5027 flow, removed 93 selfloop flow, removed 11 redundant places. [2021-11-20 07:28:30,911 INFO L242 Difference]: Finished difference. Result has 448 places, 457 transitions, 3828 flow [2021-11-20 07:28:30,912 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3828, PETRI_PLACES=448, PETRI_TRANSITIONS=457} [2021-11-20 07:28:30,912 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 247 predicate places. [2021-11-20 07:28:30,912 INFO L470 AbstractCegarLoop]: Abstraction has has 448 places, 457 transitions, 3828 flow [2021-11-20 07:28:30,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:30,913 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:30,913 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:30,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-20 07:28:30,913 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:30,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:30,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1413989063, now seen corresponding path program 29 times [2021-11-20 07:28:30,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:30,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935262111] [2021-11-20 07:28:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:30,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:31,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:31,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935262111] [2021-11-20 07:28:31,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935262111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:31,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:31,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:31,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971600605] [2021-11-20 07:28:31,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:31,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:31,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:31,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:31,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:31,694 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:31,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 457 transitions, 3828 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:31,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:31,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:31,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:33,716 INFO L129 PetriNetUnfolder]: 1962/5056 cut-off events. [2021-11-20 07:28:33,717 INFO L130 PetriNetUnfolder]: For 86532/86554 co-relation queries the response was YES. [2021-11-20 07:28:34,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23238 conditions, 5056 events. 1962/5056 cut-off events. For 86532/86554 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 46688 event pairs, 824 based on Foata normal form. 14/4857 useless extension candidates. Maximal degree in co-relation 23117. Up to 2827 conditions per place. [2021-11-20 07:28:34,104 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 305 selfloop transitions, 73 changer transitions 5/518 dead transitions. [2021-11-20 07:28:34,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 518 transitions, 5600 flow [2021-11-20 07:28:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:28:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:28:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2780 transitions. [2021-11-20 07:28:34,107 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6925759840558047 [2021-11-20 07:28:34,108 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2780 transitions. [2021-11-20 07:28:34,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2780 transitions. [2021-11-20 07:28:34,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:34,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2780 transitions. [2021-11-20 07:28:34,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.44444444444446) internal successors, (2780), 18 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states 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 07:28:34,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:34,114 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:34,114 INFO L186 Difference]: Start difference. First operand has 448 places, 457 transitions, 3828 flow. Second operand 18 states and 2780 transitions. [2021-11-20 07:28:34,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 518 transitions, 5600 flow [2021-11-20 07:28:34,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 518 transitions, 5287 flow, removed 106 selfloop flow, removed 13 redundant places. [2021-11-20 07:28:34,682 INFO L242 Difference]: Finished difference. Result has 455 places, 463 transitions, 3966 flow [2021-11-20 07:28:34,683 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3966, PETRI_PLACES=455, PETRI_TRANSITIONS=463} [2021-11-20 07:28:34,684 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 254 predicate places. [2021-11-20 07:28:34,684 INFO L470 AbstractCegarLoop]: Abstraction has has 455 places, 463 transitions, 3966 flow [2021-11-20 07:28:34,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:34,685 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:34,685 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:34,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-20 07:28:34,686 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:34,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:34,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1804171733, now seen corresponding path program 30 times [2021-11-20 07:28:34,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:34,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941604786] [2021-11-20 07:28:34,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:34,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:35,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:35,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941604786] [2021-11-20 07:28:35,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941604786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:35,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:35,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:35,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026703131] [2021-11-20 07:28:35,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:35,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:35,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:35,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:35,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:35,511 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:35,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 463 transitions, 3966 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:35,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:35,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:35,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:38,081 INFO L129 PetriNetUnfolder]: 2018/5226 cut-off events. [2021-11-20 07:28:38,081 INFO L130 PetriNetUnfolder]: For 95460/95480 co-relation queries the response was YES. [2021-11-20 07:28:38,177 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24178 conditions, 5226 events. 2018/5226 cut-off events. For 95460/95480 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 48639 event pairs, 856 based on Foata normal form. 9/5012 useless extension candidates. Maximal degree in co-relation 24053. Up to 2917 conditions per place. [2021-11-20 07:28:38,209 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 312 selfloop transitions, 78 changer transitions 5/530 dead transitions. [2021-11-20 07:28:38,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 530 transitions, 5836 flow [2021-11-20 07:28:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:28:38,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-20 07:28:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2930 transitions. [2021-11-20 07:28:38,213 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.691527023837621 [2021-11-20 07:28:38,213 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2930 transitions. [2021-11-20 07:28:38,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2930 transitions. [2021-11-20 07:28:38,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:38,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2930 transitions. [2021-11-20 07:28:38,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 154.21052631578948) internal successors, (2930), 19 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states 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 07:28:38,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:28:38,223 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:28:38,223 INFO L186 Difference]: Start difference. First operand has 455 places, 463 transitions, 3966 flow. Second operand 19 states and 2930 transitions. [2021-11-20 07:28:38,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 530 transitions, 5836 flow [2021-11-20 07:28:38,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 530 transitions, 5505 flow, removed 116 selfloop flow, removed 13 redundant places. [2021-11-20 07:28:38,687 INFO L242 Difference]: Finished difference. Result has 464 places, 475 transitions, 4185 flow [2021-11-20 07:28:38,688 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4185, PETRI_PLACES=464, PETRI_TRANSITIONS=475} [2021-11-20 07:28:38,688 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 263 predicate places. [2021-11-20 07:28:38,689 INFO L470 AbstractCegarLoop]: Abstraction has has 464 places, 475 transitions, 4185 flow [2021-11-20 07:28:38,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:38,689 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:38,689 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:38,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-20 07:28:38,690 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:38,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:38,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1582429623, now seen corresponding path program 31 times [2021-11-20 07:28:38,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:38,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16025853] [2021-11-20 07:28:38,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:38,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:39,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:39,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16025853] [2021-11-20 07:28:39,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16025853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:39,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:39,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:39,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391102688] [2021-11-20 07:28:39,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:39,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:39,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:39,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:39,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:39,534 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:39,536 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 475 transitions, 4185 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:39,536 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:39,536 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:39,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:41,687 INFO L129 PetriNetUnfolder]: 2069/5370 cut-off events. [2021-11-20 07:28:41,687 INFO L130 PetriNetUnfolder]: For 105072/105092 co-relation queries the response was YES. [2021-11-20 07:28:41,796 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25320 conditions, 5370 events. 2069/5370 cut-off events. For 105072/105092 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 50306 event pairs, 892 based on Foata normal form. 9/5151 useless extension candidates. Maximal degree in co-relation 25190. Up to 3011 conditions per place. [2021-11-20 07:28:41,825 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 326 selfloop transitions, 76 changer transitions 5/542 dead transitions. [2021-11-20 07:28:41,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 542 transitions, 6181 flow [2021-11-20 07:28:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:28:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-20 07:28:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2934 transitions. [2021-11-20 07:28:41,841 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6924710880339863 [2021-11-20 07:28:41,842 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2934 transitions. [2021-11-20 07:28:41,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2934 transitions. [2021-11-20 07:28:41,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:41,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2934 transitions. [2021-11-20 07:28:41,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 154.42105263157896) internal successors, (2934), 19 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states 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 07:28:41,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:28:41,850 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states 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 07:28:41,850 INFO L186 Difference]: Start difference. First operand has 464 places, 475 transitions, 4185 flow. Second operand 19 states and 2934 transitions. [2021-11-20 07:28:41,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 542 transitions, 6181 flow [2021-11-20 07:28:42,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 542 transitions, 5811 flow, removed 134 selfloop flow, removed 13 redundant places. [2021-11-20 07:28:42,507 INFO L242 Difference]: Finished difference. Result has 472 places, 482 transitions, 4300 flow [2021-11-20 07:28:42,508 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=3822, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4300, PETRI_PLACES=472, PETRI_TRANSITIONS=482} [2021-11-20 07:28:42,509 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 271 predicate places. [2021-11-20 07:28:42,509 INFO L470 AbstractCegarLoop]: Abstraction has has 472 places, 482 transitions, 4300 flow [2021-11-20 07:28:42,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:42,510 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:42,510 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:42,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-20 07:28:42,510 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:42,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:42,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1913404421, now seen corresponding path program 32 times [2021-11-20 07:28:42,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:42,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618438668] [2021-11-20 07:28:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:42,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:43,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:43,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618438668] [2021-11-20 07:28:43,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618438668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:43,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:43,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:43,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241456902] [2021-11-20 07:28:43,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:43,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:43,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:43,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:43,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:43,174 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:43,175 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 482 transitions, 4300 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:43,175 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:43,175 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:43,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:45,436 INFO L129 PetriNetUnfolder]: 2120/5508 cut-off events. [2021-11-20 07:28:45,436 INFO L130 PetriNetUnfolder]: For 115505/115525 co-relation queries the response was YES. [2021-11-20 07:28:45,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26391 conditions, 5508 events. 2120/5508 cut-off events. For 115505/115525 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 51945 event pairs, 934 based on Foata normal form. 9/5282 useless extension candidates. Maximal degree in co-relation 26257. Up to 3087 conditions per place. [2021-11-20 07:28:45,595 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 331 selfloop transitions, 74 changer transitions 5/545 dead transitions. [2021-11-20 07:28:45,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 545 transitions, 6267 flow [2021-11-20 07:28:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:28:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:28:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2782 transitions. [2021-11-20 07:28:45,598 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.693074240159442 [2021-11-20 07:28:45,598 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2782 transitions. [2021-11-20 07:28:45,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2782 transitions. [2021-11-20 07:28:45,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:45,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2782 transitions. [2021-11-20 07:28:45,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.55555555555554) internal successors, (2782), 18 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states 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 07:28:45,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:45,604 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:45,604 INFO L186 Difference]: Start difference. First operand has 472 places, 482 transitions, 4300 flow. Second operand 18 states and 2782 transitions. [2021-11-20 07:28:45,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 545 transitions, 6267 flow [2021-11-20 07:28:46,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 545 transitions, 5924 flow, removed 118 selfloop flow, removed 14 redundant places. [2021-11-20 07:28:46,174 INFO L242 Difference]: Finished difference. Result has 478 places, 489 transitions, 4456 flow [2021-11-20 07:28:46,175 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=3964, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4456, PETRI_PLACES=478, PETRI_TRANSITIONS=489} [2021-11-20 07:28:46,175 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 277 predicate places. [2021-11-20 07:28:46,176 INFO L470 AbstractCegarLoop]: Abstraction has has 478 places, 489 transitions, 4456 flow [2021-11-20 07:28:46,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:46,176 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:46,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:46,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-20 07:28:46,177 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:46,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:46,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1529800599, now seen corresponding path program 33 times [2021-11-20 07:28:46,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:46,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386469750] [2021-11-20 07:28:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:46,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:47,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:47,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386469750] [2021-11-20 07:28:47,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386469750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:47,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:47,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:47,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675858807] [2021-11-20 07:28:47,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:47,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:47,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:47,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:47,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:47,008 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:47,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 489 transitions, 4456 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:47,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:47,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:47,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:49,563 INFO L129 PetriNetUnfolder]: 2147/5560 cut-off events. [2021-11-20 07:28:49,563 INFO L130 PetriNetUnfolder]: For 118580/118602 co-relation queries the response was YES. [2021-11-20 07:28:49,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26913 conditions, 5560 events. 2147/5560 cut-off events. For 118580/118602 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 52610 event pairs, 926 based on Foata normal form. 14/5340 useless extension candidates. Maximal degree in co-relation 26775. Up to 3159 conditions per place. [2021-11-20 07:28:49,743 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 331 selfloop transitions, 79 changer transitions 5/550 dead transitions. [2021-11-20 07:28:49,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 550 transitions, 6338 flow [2021-11-20 07:28:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:28:49,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:28:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2776 transitions. [2021-11-20 07:28:49,752 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6915794718485302 [2021-11-20 07:28:49,752 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2776 transitions. [2021-11-20 07:28:49,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2776 transitions. [2021-11-20 07:28:49,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:49,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2776 transitions. [2021-11-20 07:28:49,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.22222222222223) internal successors, (2776), 18 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states 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 07:28:49,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:49,764 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:49,765 INFO L186 Difference]: Start difference. First operand has 478 places, 489 transitions, 4456 flow. Second operand 18 states and 2776 transitions. [2021-11-20 07:28:49,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 550 transitions, 6338 flow [2021-11-20 07:28:50,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 550 transitions, 6034 flow, removed 119 selfloop flow, removed 12 redundant places. [2021-11-20 07:28:50,569 INFO L242 Difference]: Finished difference. Result has 486 places, 499 transitions, 4583 flow [2021-11-20 07:28:50,570 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=4154, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4583, PETRI_PLACES=486, PETRI_TRANSITIONS=499} [2021-11-20 07:28:50,571 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 285 predicate places. [2021-11-20 07:28:50,571 INFO L470 AbstractCegarLoop]: Abstraction has has 486 places, 499 transitions, 4583 flow [2021-11-20 07:28:50,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:50,572 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:50,572 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:50,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-20 07:28:50,573 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:50,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1093092503, now seen corresponding path program 34 times [2021-11-20 07:28:50,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:50,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246362259] [2021-11-20 07:28:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:50,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:51,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:51,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246362259] [2021-11-20 07:28:51,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246362259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:51,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:51,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:51,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398441174] [2021-11-20 07:28:51,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:51,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:51,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:51,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:51,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:51,342 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:51,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 499 transitions, 4583 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:51,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:51,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:51,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:53,802 INFO L129 PetriNetUnfolder]: 2147/5557 cut-off events. [2021-11-20 07:28:53,802 INFO L130 PetriNetUnfolder]: For 110476/110496 co-relation queries the response was YES. [2021-11-20 07:28:53,935 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26610 conditions, 5557 events. 2147/5557 cut-off events. For 110476/110496 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 52428 event pairs, 941 based on Foata normal form. 9/5334 useless extension candidates. Maximal degree in co-relation 26468. Up to 3133 conditions per place. [2021-11-20 07:28:53,964 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 329 selfloop transitions, 80 changer transitions 5/549 dead transitions. [2021-11-20 07:28:53,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 549 transitions, 6212 flow [2021-11-20 07:28:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:28:53,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:28:53,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2771 transitions. [2021-11-20 07:28:53,968 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.690333831589437 [2021-11-20 07:28:53,968 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2771 transitions. [2021-11-20 07:28:53,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2771 transitions. [2021-11-20 07:28:53,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:53,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2771 transitions. [2021-11-20 07:28:53,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.94444444444446) internal successors, (2771), 18 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states 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 07:28:53,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:53,977 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:53,977 INFO L186 Difference]: Start difference. First operand has 486 places, 499 transitions, 4583 flow. Second operand 18 states and 2771 transitions. [2021-11-20 07:28:53,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 549 transitions, 6212 flow [2021-11-20 07:28:54,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 549 transitions, 6006 flow, removed 50 selfloop flow, removed 12 redundant places. [2021-11-20 07:28:54,461 INFO L242 Difference]: Finished difference. Result has 493 places, 502 transitions, 4631 flow [2021-11-20 07:28:54,462 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=4379, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4631, PETRI_PLACES=493, PETRI_TRANSITIONS=502} [2021-11-20 07:28:54,462 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 292 predicate places. [2021-11-20 07:28:54,462 INFO L470 AbstractCegarLoop]: Abstraction has has 493 places, 502 transitions, 4631 flow [2021-11-20 07:28:54,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:54,463 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:54,463 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:54,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-20 07:28:54,464 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:54,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash -55415269, now seen corresponding path program 35 times [2021-11-20 07:28:54,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:54,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311132827] [2021-11-20 07:28:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:54,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:55,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:55,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311132827] [2021-11-20 07:28:55,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311132827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:55,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:55,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:55,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223754246] [2021-11-20 07:28:55,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:55,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:55,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:55,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:55,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:55,238 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:55,241 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 502 transitions, 4631 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:55,241 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:55,242 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:55,242 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:28:57,928 INFO L129 PetriNetUnfolder]: 2147/5548 cut-off events. [2021-11-20 07:28:57,929 INFO L130 PetriNetUnfolder]: For 110814/110834 co-relation queries the response was YES. [2021-11-20 07:28:58,102 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26548 conditions, 5548 events. 2147/5548 cut-off events. For 110814/110834 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 52377 event pairs, 949 based on Foata normal form. 9/5322 useless extension candidates. Maximal degree in co-relation 26404. Up to 3141 conditions per place. [2021-11-20 07:28:58,141 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 333 selfloop transitions, 77 changer transitions 5/550 dead transitions. [2021-11-20 07:28:58,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 550 transitions, 6260 flow [2021-11-20 07:28:58,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:28:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 07:28:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2769 transitions. [2021-11-20 07:28:58,146 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6898355754857997 [2021-11-20 07:28:58,146 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2769 transitions. [2021-11-20 07:28:58,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2769 transitions. [2021-11-20 07:28:58,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:28:58,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2769 transitions. [2021-11-20 07:28:58,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.83333333333334) internal successors, (2769), 18 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states 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 07:28:58,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:58,154 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 07:28:58,154 INFO L186 Difference]: Start difference. First operand has 493 places, 502 transitions, 4631 flow. Second operand 18 states and 2769 transitions. [2021-11-20 07:28:58,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 550 transitions, 6260 flow [2021-11-20 07:28:58,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 550 transitions, 6034 flow, removed 35 selfloop flow, removed 15 redundant places. [2021-11-20 07:28:58,632 INFO L242 Difference]: Finished difference. Result has 497 places, 505 transitions, 4656 flow [2021-11-20 07:28:58,633 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=4407, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4656, PETRI_PLACES=497, PETRI_TRANSITIONS=505} [2021-11-20 07:28:58,633 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 296 predicate places. [2021-11-20 07:28:58,633 INFO L470 AbstractCegarLoop]: Abstraction has has 497 places, 505 transitions, 4656 flow [2021-11-20 07:28:58,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:58,634 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:28:58,634 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:58,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-20 07:28:58,634 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:28:58,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:58,635 INFO L85 PathProgramCache]: Analyzing trace with hash -564080237, now seen corresponding path program 36 times [2021-11-20 07:28:58,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:58,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140656087] [2021-11-20 07:28:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:58,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:28:59,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:59,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140656087] [2021-11-20 07:28:59,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140656087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:59,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:59,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 07:28:59,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189708305] [2021-11-20 07:28:59,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:59,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:28:59,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:28:59,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:28:59,463 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-11-20 07:28:59,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 505 transitions, 4656 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 07:28:59,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:28:59,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-11-20 07:28:59,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand