./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem15_label42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label42.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3 --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 666a05d20888797c28fb3249820f1e2654af542a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:42:25,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:42:25,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:42:25,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:42:25,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:42:25,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:42:25,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:42:25,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:42:25,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:42:25,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:42:25,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:42:25,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:42:25,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:42:25,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:42:25,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:42:25,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:42:25,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:42:25,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:42:25,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:42:25,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:42:25,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:42:25,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:42:25,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:42:25,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:42:25,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:42:25,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:42:25,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:42:25,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:42:25,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:42:25,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:42:25,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:42:25,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:42:25,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:42:25,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:42:25,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:42:25,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:42:25,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:42:25,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:42:25,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:42:25,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:42:25,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:42:25,123 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:42:25,157 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:42:25,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:42:25,157 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:42:25,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:42:25,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:42:25,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:42:25,160 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:42:25,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:42:25,160 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:42:25,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:42:25,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:42:25,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:42:25,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:42:25,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:42:25,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:42:25,162 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:42:25,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:42:25,163 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:42:25,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:42:25,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:42:25,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:42:25,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:42:25,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:42:25,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:42:25,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:42:25,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:42:25,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:42:25,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:42:25,166 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:42:25,166 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:42:25,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:42:25,166 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:42:25,167 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_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 666a05d20888797c28fb3249820f1e2654af542a [2021-10-15 19:42:25,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:42:25,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:42:25,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:42:25,531 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:42:25,532 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:42:25,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem15_label42.c [2021-10-15 19:42:25,626 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/data/489101b9b/9efb76ff08104556b0eb748af99023f8/FLAG5fb6120d3 [2021-10-15 19:42:26,448 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:42:26,449 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/sv-benchmarks/c/eca-rers2012/Problem15_label42.c [2021-10-15 19:42:26,480 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/data/489101b9b/9efb76ff08104556b0eb748af99023f8/FLAG5fb6120d3 [2021-10-15 19:42:26,545 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/data/489101b9b/9efb76ff08104556b0eb748af99023f8 [2021-10-15 19:42:26,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:42:26,560 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:42:26,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:42:26,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:42:26,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:42:26,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:42:26" (1/1) ... [2021-10-15 19:42:26,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ff51053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:26, skipping insertion in model container [2021-10-15 19:42:26,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:42:26" (1/1) ... [2021-10-15 19:42:26,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:42:26,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:42:27,044 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/sv-benchmarks/c/eca-rers2012/Problem15_label42.c[5695,5708] [2021-10-15 19:42:27,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:42:27,705 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:42:27,761 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/sv-benchmarks/c/eca-rers2012/Problem15_label42.c[5695,5708] [2021-10-15 19:42:28,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:42:28,208 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:42:28,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:28 WrapperNode [2021-10-15 19:42:28,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:42:28,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:42:28,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:42:28,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:42:28,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:28" (1/1) ... [2021-10-15 19:42:28,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:28" (1/1) ... [2021-10-15 19:42:28,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:42:28,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:42:28,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:42:28,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:42:28,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:28" (1/1) ... [2021-10-15 19:42:28,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:28" (1/1) ... [2021-10-15 19:42:28,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:28" (1/1) ... [2021-10-15 19:42:28,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:28" (1/1) ... [2021-10-15 19:42:28,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:28" (1/1) ... [2021-10-15 19:42:28,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:28" (1/1) ... [2021-10-15 19:42:28,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:28" (1/1) ... [2021-10-15 19:42:28,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:42:28,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:42:28,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:42:28,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:42:28,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:28" (1/1) ... [2021-10-15 19:42:28,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:42:28,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:42:28,928 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:42:28,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:42:28,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:42:28,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:42:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:42:28,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:42:32,713 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:42:32,714 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-15 19:42:32,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:42:32 BoogieIcfgContainer [2021-10-15 19:42:32,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:42:32,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:42:32,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:42:32,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:42:32,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:42:26" (1/3) ... [2021-10-15 19:42:32,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237942b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:42:32, skipping insertion in model container [2021-10-15 19:42:32,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:28" (2/3) ... [2021-10-15 19:42:32,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237942b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:42:32, skipping insertion in model container [2021-10-15 19:42:32,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:42:32" (3/3) ... [2021-10-15 19:42:32,729 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label42.c [2021-10-15 19:42:32,735 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:42:32,736 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:42:32,797 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:42:32,805 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, mConcurrency=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 [2021-10-15 19:42:32,806 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:42:32,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 424 places, 750 transitions, 1500 flow [2021-10-15 19:42:33,027 INFO L129 PetriNetUnfolder]: 327/750 cut-off events. [2021-10-15 19:42:33,027 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:42:33,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 750 events. 327/750 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 520 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 0. Up to 221 conditions per place. [2021-10-15 19:42:33,030 INFO L82 GeneralOperation]: Start removeDead. Operand has 424 places, 750 transitions, 1500 flow [2021-10-15 19:42:33,050 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 421 places, 745 transitions, 1490 flow [2021-10-15 19:42:33,064 INFO L129 PetriNetUnfolder]: 41/127 cut-off events. [2021-10-15 19:42:33,064 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:42:33,064 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:33,065 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] [2021-10-15 19:42:33,066 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:33,073 INFO L82 PathProgramCache]: Analyzing trace with hash 291089130, now seen corresponding path program 1 times [2021-10-15 19:42:33,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:33,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346419893] [2021-10-15 19:42:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:33,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:33,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:33,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346419893] [2021-10-15 19:42:33,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346419893] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:33,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:33,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:42:33,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052930095] [2021-10-15 19:42:33,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:33,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:33,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:33,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:42:33,567 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 750 [2021-10-15 19:42:33,572 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 745 transitions, 1490 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:33,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:33,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 750 [2021-10-15 19:42:33,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:37,496 INFO L129 PetriNetUnfolder]: 438/1200 cut-off events. [2021-10-15 19:42:37,496 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:42:37,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2347 conditions, 1200 events. 438/1200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1463 event pairs, 0 based on Foata normal form. 76/768 useless extension candidates. Maximal degree in co-relation 2. Up to 633 conditions per place. [2021-10-15 19:42:37,514 INFO L132 encePairwiseOnDemand]: 398/750 looper letters, 881 selfloop transitions, 173 changer transitions 91/1184 dead transitions. [2021-10-15 19:42:37,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 1184 transitions, 4658 flow [2021-10-15 19:42:37,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1470 transitions. [2021-10-15 19:42:37,541 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2021-10-15 19:42:37,542 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1470 transitions. [2021-10-15 19:42:37,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1470 transitions. [2021-10-15 19:42:37,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:37,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1470 transitions. [2021-10-15 19:42:37,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 490.0) internal successors, (1470), 3 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:37,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:37,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:37,598 INFO L186 Difference]: Start difference. First operand has 421 places, 745 transitions, 1490 flow. Second operand 3 states and 1470 transitions. [2021-10-15 19:42:37,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 1184 transitions, 4658 flow [2021-10-15 19:42:37,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1184 transitions, 4658 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:42:37,658 INFO L242 Difference]: Finished difference. Result has 425 places, 770 transitions, 2670 flow [2021-10-15 19:42:37,662 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2670, PETRI_PLACES=425, PETRI_TRANSITIONS=770} [2021-10-15 19:42:37,663 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, 4 predicate places. [2021-10-15 19:42:37,664 INFO L470 AbstractCegarLoop]: Abstraction has has 425 places, 770 transitions, 2670 flow [2021-10-15 19:42:37,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:37,665 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:37,666 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:37,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:42:37,667 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:37,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:37,668 INFO L82 PathProgramCache]: Analyzing trace with hash -126455687, now seen corresponding path program 1 times [2021-10-15 19:42:37,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:37,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544353430] [2021-10-15 19:42:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:37,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:37,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:37,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544353430] [2021-10-15 19:42:37,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544353430] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:37,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:37,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:42:37,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547342611] [2021-10-15 19:42:37,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:37,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:37,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:37,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:42:37,853 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 750 [2021-10-15 19:42:37,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 770 transitions, 2670 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:37,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:37,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 750 [2021-10-15 19:42:37,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:41,087 INFO L129 PetriNetUnfolder]: 516/1810 cut-off events. [2021-10-15 19:42:41,087 INFO L130 PetriNetUnfolder]: For 309/309 co-relation queries the response was YES. [2021-10-15 19:42:41,091 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4210 conditions, 1810 events. 516/1810 cut-off events. For 309/309 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3674 event pairs, 0 based on Foata normal form. 252/1991 useless extension candidates. Maximal degree in co-relation 1852. Up to 857 conditions per place. [2021-10-15 19:42:41,107 INFO L132 encePairwiseOnDemand]: 553/750 looper letters, 867 selfloop transitions, 211 changer transitions 0/1159 dead transitions. [2021-10-15 19:42:41,107 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1159 transitions, 5864 flow [2021-10-15 19:42:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:41,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1304 transitions. [2021-10-15 19:42:41,115 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5795555555555556 [2021-10-15 19:42:41,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1304 transitions. [2021-10-15 19:42:41,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1304 transitions. [2021-10-15 19:42:41,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:41,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1304 transitions. [2021-10-15 19:42:41,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 434.6666666666667) internal successors, (1304), 3 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:41,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:41,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:41,136 INFO L186 Difference]: Start difference. First operand has 425 places, 770 transitions, 2670 flow. Second operand 3 states and 1304 transitions. [2021-10-15 19:42:41,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1159 transitions, 5864 flow [2021-10-15 19:42:41,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1159 transitions, 5436 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:42:41,217 INFO L242 Difference]: Finished difference. Result has 366 places, 792 transitions, 3255 flow [2021-10-15 19:42:41,219 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=2324, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3255, PETRI_PLACES=366, PETRI_TRANSITIONS=792} [2021-10-15 19:42:41,219 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -55 predicate places. [2021-10-15 19:42:41,220 INFO L470 AbstractCegarLoop]: Abstraction has has 366 places, 792 transitions, 3255 flow [2021-10-15 19:42:41,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:41,221 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:41,221 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:41,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:42:41,222 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:41,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:41,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1586174363, now seen corresponding path program 1 times [2021-10-15 19:42:41,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:41,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966424585] [2021-10-15 19:42:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:41,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:41,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:41,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966424585] [2021-10-15 19:42:41,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966424585] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:41,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:41,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:42:41,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309200134] [2021-10-15 19:42:41,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:41,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:41,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:41,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:42:41,455 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 750 [2021-10-15 19:42:41,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 792 transitions, 3255 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:41,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:41,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 750 [2021-10-15 19:42:41,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:45,345 INFO L129 PetriNetUnfolder]: 618/3118 cut-off events. [2021-10-15 19:42:45,345 INFO L130 PetriNetUnfolder]: For 1318/1318 co-relation queries the response was YES. [2021-10-15 19:42:45,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7148 conditions, 3118 events. 618/3118 cut-off events. For 1318/1318 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 10723 event pairs, 0 based on Foata normal form. 360/3431 useless extension candidates. Maximal degree in co-relation 2732. Up to 1745 conditions per place. [2021-10-15 19:42:45,371 INFO L132 encePairwiseOnDemand]: 495/750 looper letters, 983 selfloop transitions, 142 changer transitions 0/1167 dead transitions. [2021-10-15 19:42:45,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1167 transitions, 6575 flow [2021-10-15 19:42:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1245 transitions. [2021-10-15 19:42:45,380 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5533333333333333 [2021-10-15 19:42:45,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1245 transitions. [2021-10-15 19:42:45,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1245 transitions. [2021-10-15 19:42:45,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:45,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1245 transitions. [2021-10-15 19:42:45,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 415.0) internal successors, (1245), 3 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:45,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:45,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:45,400 INFO L186 Difference]: Start difference. First operand has 366 places, 792 transitions, 3255 flow. Second operand 3 states and 1245 transitions. [2021-10-15 19:42:45,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1167 transitions, 6575 flow [2021-10-15 19:42:45,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1167 transitions, 6324 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:42:45,471 INFO L242 Difference]: Finished difference. Result has 369 places, 872 transitions, 4742 flow [2021-10-15 19:42:45,472 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=3044, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4742, PETRI_PLACES=369, PETRI_TRANSITIONS=872} [2021-10-15 19:42:45,473 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -52 predicate places. [2021-10-15 19:42:45,474 INFO L470 AbstractCegarLoop]: Abstraction has has 369 places, 872 transitions, 4742 flow [2021-10-15 19:42:45,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:45,475 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:45,476 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:45,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:42:45,476 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:45,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:45,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1437214791, now seen corresponding path program 1 times [2021-10-15 19:42:45,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:45,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132184030] [2021-10-15 19:42:45,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:45,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:45,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:45,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132184030] [2021-10-15 19:42:45,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132184030] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:45,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:45,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:42:45,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49271979] [2021-10-15 19:42:45,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:45,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:45,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:45,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:42:45,660 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 750 [2021-10-15 19:42:45,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 872 transitions, 4742 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:45,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:45,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 750 [2021-10-15 19:42:45,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:51,092 INFO L129 PetriNetUnfolder]: 744/4447 cut-off events. [2021-10-15 19:42:51,092 INFO L130 PetriNetUnfolder]: For 2772/2772 co-relation queries the response was YES. [2021-10-15 19:42:51,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10864 conditions, 4447 events. 744/4447 cut-off events. For 2772/2772 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 18827 event pairs, 0 based on Foata normal form. 348/4780 useless extension candidates. Maximal degree in co-relation 7380. Up to 2824 conditions per place. [2021-10-15 19:42:51,123 INFO L132 encePairwiseOnDemand]: 502/750 looper letters, 998 selfloop transitions, 228 changer transitions 0/1268 dead transitions. [2021-10-15 19:42:51,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1268 transitions, 8520 flow [2021-10-15 19:42:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1249 transitions. [2021-10-15 19:42:51,131 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5551111111111111 [2021-10-15 19:42:51,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1249 transitions. [2021-10-15 19:42:51,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1249 transitions. [2021-10-15 19:42:51,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:51,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1249 transitions. [2021-10-15 19:42:51,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 416.3333333333333) internal successors, (1249), 3 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:51,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:51,151 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:51,153 INFO L186 Difference]: Start difference. First operand has 369 places, 872 transitions, 4742 flow. Second operand 3 states and 1249 transitions. [2021-10-15 19:42:51,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1268 transitions, 8520 flow [2021-10-15 19:42:51,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1268 transitions, 8222 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:42:51,245 INFO L242 Difference]: Finished difference. Result has 371 places, 971 transitions, 6660 flow [2021-10-15 19:42:51,247 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=6660, PETRI_PLACES=371, PETRI_TRANSITIONS=971} [2021-10-15 19:42:51,247 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -50 predicate places. [2021-10-15 19:42:51,248 INFO L470 AbstractCegarLoop]: Abstraction has has 371 places, 971 transitions, 6660 flow [2021-10-15 19:42:51,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:51,249 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:51,252 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:51,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:42:51,253 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:51,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:51,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1023010010, now seen corresponding path program 1 times [2021-10-15 19:42:51,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:51,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538572535] [2021-10-15 19:42:51,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:51,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:51,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:51,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538572535] [2021-10-15 19:42:51,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538572535] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:51,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:51,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:42:51,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524312605] [2021-10-15 19:42:51,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:51,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:51,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:51,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:42:51,504 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 750 [2021-10-15 19:42:51,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 971 transitions, 6660 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:51,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:51,512 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 750 [2021-10-15 19:42:51,512 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:57,261 INFO L129 PetriNetUnfolder]: 862/5770 cut-off events. [2021-10-15 19:42:57,262 INFO L130 PetriNetUnfolder]: For 7003/7003 co-relation queries the response was YES. [2021-10-15 19:42:57,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14754 conditions, 5770 events. 862/5770 cut-off events. For 7003/7003 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 27138 event pairs, 0 based on Foata normal form. 358/6114 useless extension candidates. Maximal degree in co-relation 4271. Up to 4282 conditions per place. [2021-10-15 19:42:57,288 INFO L132 encePairwiseOnDemand]: 489/750 looper letters, 1119 selfloop transitions, 196 changer transitions 0/1357 dead transitions. [2021-10-15 19:42:57,289 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1357 transitions, 10774 flow [2021-10-15 19:42:57,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:57,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1249 transitions. [2021-10-15 19:42:57,294 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5551111111111111 [2021-10-15 19:42:57,295 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1249 transitions. [2021-10-15 19:42:57,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1249 transitions. [2021-10-15 19:42:57,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:57,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1249 transitions. [2021-10-15 19:42:57,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 416.3333333333333) internal successors, (1249), 3 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:57,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:57,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:57,310 INFO L186 Difference]: Start difference. First operand has 371 places, 971 transitions, 6660 flow. Second operand 3 states and 1249 transitions. [2021-10-15 19:42:57,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1357 transitions, 10774 flow [2021-10-15 19:42:57,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1357 transitions, 10252 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:42:57,408 INFO L242 Difference]: Finished difference. Result has 373 places, 1060 transitions, 8474 flow [2021-10-15 19:42:57,410 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=6188, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=968, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8474, PETRI_PLACES=373, PETRI_TRANSITIONS=1060} [2021-10-15 19:42:57,410 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -48 predicate places. [2021-10-15 19:42:57,410 INFO L470 AbstractCegarLoop]: Abstraction has has 373 places, 1060 transitions, 8474 flow [2021-10-15 19:42:57,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:57,411 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:57,412 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:57,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:42:57,412 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:57,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:57,413 INFO L82 PathProgramCache]: Analyzing trace with hash -811672651, now seen corresponding path program 1 times [2021-10-15 19:42:57,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:57,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043728095] [2021-10-15 19:42:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:57,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-10-15 19:42:57,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:57,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043728095] [2021-10-15 19:42:57,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043728095] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:57,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:57,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:42:57,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770999592] [2021-10-15 19:42:57,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:57,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:57,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:57,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:42:57,658 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 750 [2021-10-15 19:42:57,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 1060 transitions, 8474 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:57,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:57,660 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 750 [2021-10-15 19:42:57,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:43:02,592 INFO L129 PetriNetUnfolder]: 868/6075 cut-off events. [2021-10-15 19:43:02,593 INFO L130 PetriNetUnfolder]: For 6782/6782 co-relation queries the response was YES. [2021-10-15 19:43:02,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15928 conditions, 6075 events. 868/6075 cut-off events. For 6782/6782 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 28538 event pairs, 0 based on Foata normal form. 6/6073 useless extension candidates. Maximal degree in co-relation 9858. Up to 5649 conditions per place. [2021-10-15 19:43:02,620 INFO L132 encePairwiseOnDemand]: 737/750 looper letters, 1318 selfloop transitions, 7 changer transitions 0/1361 dead transitions. [2021-10-15 19:43:02,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1361 transitions, 11762 flow [2021-10-15 19:43:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:43:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:43:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1010 transitions. [2021-10-15 19:43:02,626 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4488888888888889 [2021-10-15 19:43:02,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1010 transitions. [2021-10-15 19:43:02,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1010 transitions. [2021-10-15 19:43:02,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:43:02,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1010 transitions. [2021-10-15 19:43:02,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:02,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:02,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:02,643 INFO L186 Difference]: Start difference. First operand has 373 places, 1060 transitions, 8474 flow. Second operand 3 states and 1010 transitions. [2021-10-15 19:43:02,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1361 transitions, 11762 flow [2021-10-15 19:43:02,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 1361 transitions, 11370 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:43:02,741 INFO L242 Difference]: Finished difference. Result has 374 places, 1066 transitions, 8175 flow [2021-10-15 19:43:02,743 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=8082, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1060, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1053, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8175, PETRI_PLACES=374, PETRI_TRANSITIONS=1066} [2021-10-15 19:43:02,743 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -47 predicate places. [2021-10-15 19:43:02,743 INFO L470 AbstractCegarLoop]: Abstraction has has 374 places, 1066 transitions, 8175 flow [2021-10-15 19:43:02,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:02,744 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:43:02,745 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:02,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:43:02,746 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:43:02,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:02,746 INFO L82 PathProgramCache]: Analyzing trace with hash 105527406, now seen corresponding path program 1 times [2021-10-15 19:43:02,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:02,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832643365] [2021-10-15 19:43:02,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:02,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:43:02,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:02,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832643365] [2021-10-15 19:43:02,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832643365] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:02,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:43:02,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:43:02,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566870499] [2021-10-15 19:43:02,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:43:02,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:02,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:43:02,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:43:02,963 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 750 [2021-10-15 19:43:02,965 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1066 transitions, 8175 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:02,965 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:43:02,965 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 750 [2021-10-15 19:43:02,965 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:43:09,751 INFO L129 PetriNetUnfolder]: 1008/7422 cut-off events. [2021-10-15 19:43:09,751 INFO L130 PetriNetUnfolder]: For 9823/9823 co-relation queries the response was YES. [2021-10-15 19:43:09,757 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19042 conditions, 7422 events. 1008/7422 cut-off events. For 9823/9823 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 37358 event pairs, 0 based on Foata normal form. 339/7752 useless extension candidates. Maximal degree in co-relation 10579. Up to 5937 conditions per place. [2021-10-15 19:43:09,783 INFO L132 encePairwiseOnDemand]: 496/750 looper letters, 1226 selfloop transitions, 209 changer transitions 0/1477 dead transitions. [2021-10-15 19:43:09,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1477 transitions, 12915 flow [2021-10-15 19:43:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:43:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:43:09,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1251 transitions. [2021-10-15 19:43:09,789 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.556 [2021-10-15 19:43:09,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1251 transitions. [2021-10-15 19:43:09,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1251 transitions. [2021-10-15 19:43:09,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:43:09,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1251 transitions. [2021-10-15 19:43:09,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 417.0) internal successors, (1251), 3 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:09,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:09,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:09,804 INFO L186 Difference]: Start difference. First operand has 374 places, 1066 transitions, 8175 flow. Second operand 3 states and 1251 transitions. [2021-10-15 19:43:09,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1477 transitions, 12915 flow [2021-10-15 19:43:09,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1477 transitions, 12878 flow, removed 15 selfloop flow, removed 1 redundant places. [2021-10-15 19:43:09,951 INFO L242 Difference]: Finished difference. Result has 377 places, 1178 transitions, 10918 flow [2021-10-15 19:43:09,954 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=8122, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1062, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=853, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=10918, PETRI_PLACES=377, PETRI_TRANSITIONS=1178} [2021-10-15 19:43:09,954 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -44 predicate places. [2021-10-15 19:43:09,954 INFO L470 AbstractCegarLoop]: Abstraction has has 377 places, 1178 transitions, 10918 flow [2021-10-15 19:43:09,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:09,955 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:43:09,956 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:09,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:43:09,956 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:43:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:09,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2095815329, now seen corresponding path program 1 times [2021-10-15 19:43:09,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:09,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916641713] [2021-10-15 19:43:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:09,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-10-15 19:43:10,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:10,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916641713] [2021-10-15 19:43:10,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916641713] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:10,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:43:10,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:43:10,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958033964] [2021-10-15 19:43:10,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:43:10,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:10,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:43:10,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:43:10,204 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 750 [2021-10-15 19:43:10,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1178 transitions, 10918 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:10,205 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:43:10,205 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 750 [2021-10-15 19:43:10,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:43:22,226 INFO L129 PetriNetUnfolder]: 1261/12772 cut-off events. [2021-10-15 19:43:22,226 INFO L130 PetriNetUnfolder]: For 18902/18902 co-relation queries the response was YES. [2021-10-15 19:43:22,241 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31903 conditions, 12772 events. 1261/12772 cut-off events. For 18902/18902 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 86334 event pairs, 0 based on Foata normal form. 480/13252 useless extension candidates. Maximal degree in co-relation 27928. Up to 6504 conditions per place. [2021-10-15 19:43:22,277 INFO L132 encePairwiseOnDemand]: 514/750 looper letters, 1068 selfloop transitions, 316 changer transitions 303/1750 dead transitions. [2021-10-15 19:43:22,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 1750 transitions, 18338 flow [2021-10-15 19:43:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:43:22,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:43:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1262 transitions. [2021-10-15 19:43:22,284 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5608888888888889 [2021-10-15 19:43:22,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1262 transitions. [2021-10-15 19:43:22,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1262 transitions. [2021-10-15 19:43:22,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:43:22,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1262 transitions. [2021-10-15 19:43:22,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 420.6666666666667) internal successors, (1262), 3 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:22,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:22,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:22,300 INFO L186 Difference]: Start difference. First operand has 377 places, 1178 transitions, 10918 flow. Second operand 3 states and 1262 transitions. [2021-10-15 19:43:22,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 1750 transitions, 18338 flow [2021-10-15 19:43:22,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1750 transitions, 17790 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:43:22,549 INFO L242 Difference]: Finished difference. Result has 379 places, 1129 transitions, 11736 flow [2021-10-15 19:43:22,551 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=10418, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=856, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=11736, PETRI_PLACES=379, PETRI_TRANSITIONS=1129} [2021-10-15 19:43:22,552 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -42 predicate places. [2021-10-15 19:43:22,553 INFO L470 AbstractCegarLoop]: Abstraction has has 379 places, 1129 transitions, 11736 flow [2021-10-15 19:43:22,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:22,554 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:43:22,556 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:22,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:43:22,556 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:43:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:22,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1049482387, now seen corresponding path program 1 times [2021-10-15 19:43:22,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:22,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630191753] [2021-10-15 19:43:22,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:22,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-10-15 19:43:22,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:22,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630191753] [2021-10-15 19:43:22,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630191753] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:22,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:43:22,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:43:22,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925975076] [2021-10-15 19:43:22,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:43:22,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:22,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:43:22,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:43:22,946 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 750 [2021-10-15 19:43:22,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1129 transitions, 11736 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:22,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:43:22,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 750 [2021-10-15 19:43:22,948 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:43:33,606 INFO L129 PetriNetUnfolder]: 994/11306 cut-off events. [2021-10-15 19:43:33,606 INFO L130 PetriNetUnfolder]: For 16030/16030 co-relation queries the response was YES. [2021-10-15 19:43:33,619 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28549 conditions, 11306 events. 994/11306 cut-off events. For 16030/16030 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 70609 event pairs, 0 based on Foata normal form. 11/11311 useless extension candidates. Maximal degree in co-relation 24515. Up to 10729 conditions per place. [2021-10-15 19:43:33,644 INFO L132 encePairwiseOnDemand]: 700/750 looper letters, 1317 selfloop transitions, 49 changer transitions 0/1463 dead transitions. [2021-10-15 19:43:33,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1463 transitions, 15696 flow [2021-10-15 19:43:33,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:43:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:43:33,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2021-10-15 19:43:33,650 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46755555555555556 [2021-10-15 19:43:33,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2021-10-15 19:43:33,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2021-10-15 19:43:33,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:43:33,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2021-10-15 19:43:33,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:33,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:33,664 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:33,664 INFO L186 Difference]: Start difference. First operand has 379 places, 1129 transitions, 11736 flow. Second operand 3 states and 1052 transitions. [2021-10-15 19:43:33,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1463 transitions, 15696 flow [2021-10-15 19:43:33,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1463 transitions, 15038 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:43:33,836 INFO L242 Difference]: Finished difference. Result has 380 places, 1168 transitions, 11955 flow [2021-10-15 19:43:33,838 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=11044, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1073, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=11955, PETRI_PLACES=380, PETRI_TRANSITIONS=1168} [2021-10-15 19:43:33,838 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -41 predicate places. [2021-10-15 19:43:33,838 INFO L470 AbstractCegarLoop]: Abstraction has has 380 places, 1168 transitions, 11955 flow [2021-10-15 19:43:33,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:33,839 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:43:33,841 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:33,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:43:33,842 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:43:33,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:33,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1504879367, now seen corresponding path program 1 times [2021-10-15 19:43:33,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:33,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518242481] [2021-10-15 19:43:33,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:33,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 375 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-10-15 19:43:34,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:34,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518242481] [2021-10-15 19:43:34,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518242481] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:34,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:43:34,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:43:34,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120434636] [2021-10-15 19:43:34,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:43:34,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:34,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:43:34,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:43:34,204 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 750 [2021-10-15 19:43:34,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 1168 transitions, 11955 flow. Second operand has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:34,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:43:34,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 750 [2021-10-15 19:43:34,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:43:49,224 INFO L129 PetriNetUnfolder]: 1128/14430 cut-off events. [2021-10-15 19:43:49,224 INFO L130 PetriNetUnfolder]: For 21400/21400 co-relation queries the response was YES. [2021-10-15 19:43:49,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35274 conditions, 14430 events. 1128/14430 cut-off events. For 21400/21400 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 97280 event pairs, 0 based on Foata normal form. 316/14740 useless extension candidates. Maximal degree in co-relation 34174. Up to 8101 conditions per place. [2021-10-15 19:43:49,264 INFO L132 encePairwiseOnDemand]: 565/750 looper letters, 932 selfloop transitions, 400 changer transitions 179/1608 dead transitions. [2021-10-15 19:43:49,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1608 transitions, 17445 flow [2021-10-15 19:43:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:43:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:43:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1183 transitions. [2021-10-15 19:43:49,268 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5257777777777778 [2021-10-15 19:43:49,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1183 transitions. [2021-10-15 19:43:49,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1183 transitions. [2021-10-15 19:43:49,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:43:49,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1183 transitions. [2021-10-15 19:43:49,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 394.3333333333333) internal successors, (1183), 3 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:49,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:49,282 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:49,282 INFO L186 Difference]: Start difference. First operand has 380 places, 1168 transitions, 11955 flow. Second operand 3 states and 1183 transitions. [2021-10-15 19:43:49,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1608 transitions, 17445 flow [2021-10-15 19:43:49,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1608 transitions, 17036 flow, removed 180 selfloop flow, removed 1 redundant places. [2021-10-15 19:43:49,418 INFO L242 Difference]: Finished difference. Result has 383 places, 1134 transitions, 13184 flow [2021-10-15 19:43:49,420 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=11546, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=13184, PETRI_PLACES=383, PETRI_TRANSITIONS=1134} [2021-10-15 19:43:49,421 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -38 predicate places. [2021-10-15 19:43:49,421 INFO L470 AbstractCegarLoop]: Abstraction has has 383 places, 1134 transitions, 13184 flow [2021-10-15 19:43:49,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:49,422 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:43:49,423 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:49,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:43:49,423 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:43:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:49,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1043281100, now seen corresponding path program 1 times [2021-10-15 19:43:49,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:49,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054862112] [2021-10-15 19:43:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:49,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 88 proven. 247 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-10-15 19:43:49,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:49,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054862112] [2021-10-15 19:43:49,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054862112] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:43:49,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88279308] [2021-10-15 19:43:49,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:49,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:43:49,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:43:49,854 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:43:49,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:43:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:50,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:43:50,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:43:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-10-15 19:43:52,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88279308] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:52,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:43:52,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 19:43:52,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785704393] [2021-10-15 19:43:52,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:43:52,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:52,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:43:52,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:43:52,103 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 750 [2021-10-15 19:43:52,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 1134 transitions, 13184 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:52,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:43:52,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 750 [2021-10-15 19:43:52,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:44:08,878 INFO L129 PetriNetUnfolder]: 962/15460 cut-off events. [2021-10-15 19:44:08,878 INFO L130 PetriNetUnfolder]: For 21965/21965 co-relation queries the response was YES. [2021-10-15 19:44:08,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37559 conditions, 15460 events. 962/15460 cut-off events. For 21965/21965 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 112217 event pairs, 0 based on Foata normal form. 28/15482 useless extension candidates. Maximal degree in co-relation 33519. Up to 10826 conditions per place. [2021-10-15 19:44:08,927 INFO L132 encePairwiseOnDemand]: 675/750 looper letters, 1235 selfloop transitions, 213 changer transitions 0/1505 dead transitions. [2021-10-15 19:44:08,927 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 1505 transitions, 17902 flow [2021-10-15 19:44:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:44:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:44:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 993 transitions. [2021-10-15 19:44:08,933 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44133333333333336 [2021-10-15 19:44:08,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 993 transitions. [2021-10-15 19:44:08,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 993 transitions. [2021-10-15 19:44:08,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:44:08,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 993 transitions. [2021-10-15 19:44:08,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:44:08,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:44:08,942 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:44:08,943 INFO L186 Difference]: Start difference. First operand has 383 places, 1134 transitions, 13184 flow. Second operand 3 states and 993 transitions. [2021-10-15 19:44:08,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 1505 transitions, 17902 flow [2021-10-15 19:44:09,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1505 transitions, 17008 flow, removed 16 selfloop flow, removed 2 redundant places. [2021-10-15 19:44:09,060 INFO L242 Difference]: Finished difference. Result has 385 places, 1210 transitions, 14578 flow [2021-10-15 19:44:09,062 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=12362, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=921, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=14578, PETRI_PLACES=385, PETRI_TRANSITIONS=1210} [2021-10-15 19:44:09,063 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -36 predicate places. [2021-10-15 19:44:09,063 INFO L470 AbstractCegarLoop]: Abstraction has has 385 places, 1210 transitions, 14578 flow [2021-10-15 19:44:09,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:44:09,064 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:44:09,065 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:44:09,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-15 19:44:09,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:44:09,283 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:44:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:44:09,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1737683978, now seen corresponding path program 1 times [2021-10-15 19:44:09,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:44:09,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215846046] [2021-10-15 19:44:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:44:09,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:44:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:44:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-10-15 19:44:09,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:44:09,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215846046] [2021-10-15 19:44:09,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215846046] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:44:09,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:44:09,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:44:09,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798966972] [2021-10-15 19:44:09,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:44:09,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:44:09,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:44:09,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:44:09,605 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 750 [2021-10-15 19:44:09,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 1210 transitions, 14578 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:44:09,607 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:44:09,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 750 [2021-10-15 19:44:09,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:44:33,767 INFO L129 PetriNetUnfolder]: 1287/21793 cut-off events. [2021-10-15 19:44:33,767 INFO L130 PetriNetUnfolder]: For 37215/37215 co-relation queries the response was YES. [2021-10-15 19:44:33,802 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52899 conditions, 21793 events. 1287/21793 cut-off events. For 37215/37215 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 182814 event pairs, 0 based on Foata normal form. 230/22013 useless extension candidates. Maximal degree in co-relation 45882. Up to 14563 conditions per place. [2021-10-15 19:44:33,839 INFO L132 encePairwiseOnDemand]: 586/750 looper letters, 1359 selfloop transitions, 405 changer transitions 0/1803 dead transitions. [2021-10-15 19:44:33,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1803 transitions, 23738 flow [2021-10-15 19:44:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:44:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:44:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1091 transitions. [2021-10-15 19:44:33,842 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48488888888888887 [2021-10-15 19:44:33,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1091 transitions. [2021-10-15 19:44:33,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1091 transitions. [2021-10-15 19:44:33,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:44:33,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1091 transitions. [2021-10-15 19:44:33,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 363.6666666666667) internal successors, (1091), 3 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:44:33,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:44:33,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:44:33,849 INFO L186 Difference]: Start difference. First operand has 385 places, 1210 transitions, 14578 flow. Second operand 3 states and 1091 transitions. [2021-10-15 19:44:33,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1803 transitions, 23738 flow [2021-10-15 19:44:33,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 1803 transitions, 22998 flow, removed 96 selfloop flow, removed 2 redundant places. [2021-10-15 19:44:33,961 INFO L242 Difference]: Finished difference. Result has 387 places, 1468 transitions, 20726 flow [2021-10-15 19:44:33,963 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=13854, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20726, PETRI_PLACES=387, PETRI_TRANSITIONS=1468} [2021-10-15 19:44:33,963 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -34 predicate places. [2021-10-15 19:44:33,963 INFO L470 AbstractCegarLoop]: Abstraction has has 387 places, 1468 transitions, 20726 flow [2021-10-15 19:44:33,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:44:33,964 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:44:33,964 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:44:33,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 19:44:33,965 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:44:33,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:44:33,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1326373647, now seen corresponding path program 1 times [2021-10-15 19:44:33,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:44:33,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012310472] [2021-10-15 19:44:33,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:44:33,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:44:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:44:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-10-15 19:44:34,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:44:34,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012310472] [2021-10-15 19:44:34,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012310472] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:44:34,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:44:34,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:44:34,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640296252] [2021-10-15 19:44:34,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:44:34,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:44:34,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:44:34,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:44:34,218 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 750 [2021-10-15 19:44:34,219 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1468 transitions, 20726 flow. Second operand has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:44:34,219 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:44:34,219 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 750 [2021-10-15 19:44:34,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:05,053 INFO L129 PetriNetUnfolder]: 1560/24455 cut-off events. [2021-10-15 19:45:05,053 INFO L130 PetriNetUnfolder]: For 50875/50875 co-relation queries the response was YES. [2021-10-15 19:45:05,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61358 conditions, 24455 events. 1560/24455 cut-off events. For 50875/50875 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 209109 event pairs, 0 based on Foata normal form. 134/24589 useless extension candidates. Maximal degree in co-relation 53733. Up to 15337 conditions per place. [2021-10-15 19:45:05,145 INFO L132 encePairwiseOnDemand]: 578/750 looper letters, 1251 selfloop transitions, 648 changer transitions 0/2015 dead transitions. [2021-10-15 19:45:05,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 2015 transitions, 29998 flow [2021-10-15 19:45:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:45:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:45:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1131 transitions. [2021-10-15 19:45:05,151 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5026666666666667 [2021-10-15 19:45:05,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1131 transitions. [2021-10-15 19:45:05,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1131 transitions. [2021-10-15 19:45:05,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:05,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1131 transitions. [2021-10-15 19:45:05,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 377.0) internal successors, (1131), 3 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:05,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:05,163 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:05,163 INFO L186 Difference]: Start difference. First operand has 387 places, 1468 transitions, 20726 flow. Second operand 3 states and 1131 transitions. [2021-10-15 19:45:05,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 2015 transitions, 29998 flow [2021-10-15 19:45:05,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 2015 transitions, 29022 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:45:05,372 INFO L242 Difference]: Finished difference. Result has 389 places, 1720 transitions, 27928 flow [2021-10-15 19:45:05,374 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=19112, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=774, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=27928, PETRI_PLACES=389, PETRI_TRANSITIONS=1720} [2021-10-15 19:45:05,375 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -32 predicate places. [2021-10-15 19:45:05,375 INFO L470 AbstractCegarLoop]: Abstraction has has 389 places, 1720 transitions, 27928 flow [2021-10-15 19:45:05,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:05,376 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:05,377 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:05,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 19:45:05,378 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:05,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:05,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1381717930, now seen corresponding path program 1 times [2021-10-15 19:45:05,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:05,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939587454] [2021-10-15 19:45:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:05,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 88 proven. 247 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-10-15 19:45:05,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:05,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939587454] [2021-10-15 19:45:05,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939587454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:05,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2795768] [2021-10-15 19:45:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:05,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:05,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:05,778 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:05,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:45:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:06,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:45:06,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-10-15 19:45:08,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2795768] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:45:08,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:08,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 19:45:08,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721500931] [2021-10-15 19:45:08,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:45:08,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:08,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:45:08,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:45:08,149 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 750 [2021-10-15 19:45:08,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 1720 transitions, 27928 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:08,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:08,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 750 [2021-10-15 19:45:08,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:45,143 INFO L129 PetriNetUnfolder]: 976/23250 cut-off events. [2021-10-15 19:45:45,143 INFO L130 PetriNetUnfolder]: For 56948/56948 co-relation queries the response was YES. [2021-10-15 19:45:45,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54764 conditions, 23250 events. 976/23250 cut-off events. For 56948/56948 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 200740 event pairs, 0 based on Foata normal form. 548/23794 useless extension candidates. Maximal degree in co-relation 47224. Up to 18303 conditions per place. [2021-10-15 19:45:45,220 INFO L132 encePairwiseOnDemand]: 594/750 looper letters, 1254 selfloop transitions, 217 changer transitions 0/1515 dead transitions. [2021-10-15 19:45:45,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1515 transitions, 20824 flow [2021-10-15 19:45:45,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:45:45,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:45:45,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1030 transitions. [2021-10-15 19:45:45,225 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4577777777777778 [2021-10-15 19:45:45,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1030 transitions. [2021-10-15 19:45:45,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1030 transitions. [2021-10-15 19:45:45,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:45,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1030 transitions. [2021-10-15 19:45:45,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.3333333333333) internal successors, (1030), 3 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:45,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:45,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:45,234 INFO L186 Difference]: Start difference. First operand has 389 places, 1720 transitions, 27928 flow. Second operand 3 states and 1030 transitions. [2021-10-15 19:45:45,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1515 transitions, 20824 flow [2021-10-15 19:45:45,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1515 transitions, 19992 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-10-15 19:45:45,384 INFO L242 Difference]: Finished difference. Result has 390 places, 1220 transitions, 17131 flow [2021-10-15 19:45:45,386 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=16460, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1003, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=17131, PETRI_PLACES=390, PETRI_TRANSITIONS=1220} [2021-10-15 19:45:45,387 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -31 predicate places. [2021-10-15 19:45:45,387 INFO L470 AbstractCegarLoop]: Abstraction has has 390 places, 1220 transitions, 17131 flow [2021-10-15 19:45:45,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:45,387 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:45,388 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:45,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:45,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 19:45:45,603 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:45,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:45,604 INFO L82 PathProgramCache]: Analyzing trace with hash 62263666, now seen corresponding path program 1 times [2021-10-15 19:45:45,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:45,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345630579] [2021-10-15 19:45:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:45,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-10-15 19:45:45,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:45,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345630579] [2021-10-15 19:45:45,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345630579] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:45:45,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:45:45,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:45:45,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048697619] [2021-10-15 19:45:45,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:45:45,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:45,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:45:45,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:45:45,950 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 750 [2021-10-15 19:45:45,951 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 1220 transitions, 17131 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:45,951 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:45,951 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 750 [2021-10-15 19:45:45,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:21,046 INFO L129 PetriNetUnfolder]: 1205/28297 cut-off events. [2021-10-15 19:46:21,047 INFO L130 PetriNetUnfolder]: For 45176/45176 co-relation queries the response was YES. [2021-10-15 19:46:21,095 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66992 conditions, 28297 events. 1205/28297 cut-off events. For 45176/45176 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 257633 event pairs, 0 based on Foata normal form. 115/28412 useless extension candidates. Maximal degree in co-relation 57941. Up to 16783 conditions per place. [2021-10-15 19:46:21,139 INFO L132 encePairwiseOnDemand]: 591/750 looper letters, 1303 selfloop transitions, 415 changer transitions 0/1757 dead transitions. [2021-10-15 19:46:21,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1757 transitions, 25788 flow [2021-10-15 19:46:21,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:46:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:46:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1095 transitions. [2021-10-15 19:46:21,143 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2021-10-15 19:46:21,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1095 transitions. [2021-10-15 19:46:21,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1095 transitions. [2021-10-15 19:46:21,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:21,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1095 transitions. [2021-10-15 19:46:21,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:21,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:21,152 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:21,152 INFO L186 Difference]: Start difference. First operand has 390 places, 1220 transitions, 17131 flow. Second operand 3 states and 1095 transitions. [2021-10-15 19:46:21,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1757 transitions, 25788 flow [2021-10-15 19:46:21,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1757 transitions, 25512 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:46:21,340 INFO L242 Difference]: Finished difference. Result has 393 places, 1412 transitions, 22930 flow [2021-10-15 19:46:21,342 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=16894, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=804, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=22930, PETRI_PLACES=393, PETRI_TRANSITIONS=1412} [2021-10-15 19:46:21,343 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -28 predicate places. [2021-10-15 19:46:21,343 INFO L470 AbstractCegarLoop]: Abstraction has has 393 places, 1412 transitions, 22930 flow [2021-10-15 19:46:21,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:21,343 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:21,344 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:21,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 19:46:21,345 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:21,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:21,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1332069740, now seen corresponding path program 1 times [2021-10-15 19:46:21,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:21,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234432915] [2021-10-15 19:46:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:21,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:46:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 468 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-10-15 19:46:21,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:21,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234432915] [2021-10-15 19:46:21,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234432915] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:46:21,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:46:21,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:46:21,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902992750] [2021-10-15 19:46:21,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:46:21,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:21,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:46:21,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:46:21,705 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 750 [2021-10-15 19:46:21,706 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1412 transitions, 22930 flow. Second operand has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:21,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:21,707 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 750 [2021-10-15 19:46:21,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:10,261 INFO L129 PetriNetUnfolder]: 1354/34137 cut-off events. [2021-10-15 19:47:10,261 INFO L130 PetriNetUnfolder]: For 64415/64415 co-relation queries the response was YES. [2021-10-15 19:47:10,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81089 conditions, 34137 events. 1354/34137 cut-off events. For 64415/64415 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 319808 event pairs, 0 based on Foata normal form. 146/34283 useless extension candidates. Maximal degree in co-relation 72013. Up to 20636 conditions per place. [2021-10-15 19:47:10,363 INFO L132 encePairwiseOnDemand]: 597/750 looper letters, 1300 selfloop transitions, 400 changer transitions 103/1865 dead transitions. [2021-10-15 19:47:10,363 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1865 transitions, 30520 flow [2021-10-15 19:47:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:47:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:47:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1094 transitions. [2021-10-15 19:47:10,367 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4862222222222222 [2021-10-15 19:47:10,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1094 transitions. [2021-10-15 19:47:10,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1094 transitions. [2021-10-15 19:47:10,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:10,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1094 transitions. [2021-10-15 19:47:10,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.6666666666667) internal successors, (1094), 3 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:10,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:10,375 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:10,375 INFO L186 Difference]: Start difference. First operand has 393 places, 1412 transitions, 22930 flow. Second operand 3 states and 1094 transitions. [2021-10-15 19:47:10,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1865 transitions, 30520 flow [2021-10-15 19:47:10,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1865 transitions, 29546 flow, removed 8 selfloop flow, removed 2 redundant places. [2021-10-15 19:47:10,525 INFO L242 Difference]: Finished difference. Result has 395 places, 1439 transitions, 24750 flow [2021-10-15 19:47:10,527 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=21942, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1002, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=24750, PETRI_PLACES=395, PETRI_TRANSITIONS=1439} [2021-10-15 19:47:10,527 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -26 predicate places. [2021-10-15 19:47:10,527 INFO L470 AbstractCegarLoop]: Abstraction has has 395 places, 1439 transitions, 24750 flow [2021-10-15 19:47:10,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:10,528 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:10,528 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:10,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 19:47:10,529 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:10,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:10,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1119185175, now seen corresponding path program 1 times [2021-10-15 19:47:10,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:10,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750313963] [2021-10-15 19:47:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:10,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:47:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2021-10-15 19:47:10,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:10,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750313963] [2021-10-15 19:47:10,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750313963] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:47:10,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:47:10,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:47:10,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502053582] [2021-10-15 19:47:10,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:47:10,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:10,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:47:10,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:47:10,813 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 750 [2021-10-15 19:47:10,813 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1439 transitions, 24750 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:10,813 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:10,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 750 [2021-10-15 19:47:10,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:51,150 INFO L129 PetriNetUnfolder]: 1397/35984 cut-off events. [2021-10-15 19:47:51,151 INFO L130 PetriNetUnfolder]: For 69014/69014 co-relation queries the response was YES. [2021-10-15 19:47:51,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85817 conditions, 35984 events. 1397/35984 cut-off events. For 69014/69014 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 343328 event pairs, 0 based on Foata normal form. 63/36047 useless extension candidates. Maximal degree in co-relation 76150. Up to 22554 conditions per place. [2021-10-15 19:47:51,263 INFO L132 encePairwiseOnDemand]: 611/750 looper letters, 1311 selfloop transitions, 533 changer transitions 5/1888 dead transitions. [2021-10-15 19:47:51,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 1888 transitions, 32182 flow [2021-10-15 19:47:51,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:47:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:47:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1046 transitions. [2021-10-15 19:47:51,268 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4648888888888889 [2021-10-15 19:47:51,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1046 transitions. [2021-10-15 19:47:51,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1046 transitions. [2021-10-15 19:47:51,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:51,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1046 transitions. [2021-10-15 19:47:51,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:51,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:51,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:51,277 INFO L186 Difference]: Start difference. First operand has 395 places, 1439 transitions, 24750 flow. Second operand 3 states and 1046 transitions. [2021-10-15 19:47:51,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 1888 transitions, 32182 flow [2021-10-15 19:47:51,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1888 transitions, 31234 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:47:51,414 INFO L242 Difference]: Finished difference. Result has 397 places, 1564 transitions, 28870 flow [2021-10-15 19:47:51,415 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=23094, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=869, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=28870, PETRI_PLACES=397, PETRI_TRANSITIONS=1564} [2021-10-15 19:47:51,416 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -24 predicate places. [2021-10-15 19:47:51,416 INFO L470 AbstractCegarLoop]: Abstraction has has 397 places, 1564 transitions, 28870 flow [2021-10-15 19:47:51,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:51,416 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:51,417 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:51,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-15 19:47:51,417 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:51,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:51,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1436840268, now seen corresponding path program 1 times [2021-10-15 19:47:51,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:51,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058495337] [2021-10-15 19:47:51,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:51,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:47:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2021-10-15 19:47:51,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:51,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058495337] [2021-10-15 19:47:51,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058495337] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:47:51,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:47:51,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:47:51,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534132447] [2021-10-15 19:47:51,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:47:51,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:51,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:47:51,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:47:51,790 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 750 [2021-10-15 19:47:51,791 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1564 transitions, 28870 flow. Second operand has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:51,791 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:51,791 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 750 [2021-10-15 19:47:51,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:51,719 INFO L129 PetriNetUnfolder]: 1502/44171 cut-off events. [2021-10-15 19:48:51,719 INFO L130 PetriNetUnfolder]: For 92734/92734 co-relation queries the response was YES. [2021-10-15 19:48:51,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104218 conditions, 44171 events. 1502/44171 cut-off events. For 92734/92734 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 436235 event pairs, 0 based on Foata normal form. 218/44389 useless extension candidates. Maximal degree in co-relation 93198. Up to 24556 conditions per place. [2021-10-15 19:48:51,819 INFO L132 encePairwiseOnDemand]: 585/750 looper letters, 0 selfloop transitions, 0 changer transitions 2240/2240 dead transitions. [2021-10-15 19:48:51,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 2240 transitions, 36682 flow [2021-10-15 19:48:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:51,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1467 transitions. [2021-10-15 19:48:51,824 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.489 [2021-10-15 19:48:51,824 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1467 transitions. [2021-10-15 19:48:51,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1467 transitions. [2021-10-15 19:48:51,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:51,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1467 transitions. [2021-10-15 19:48:51,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 366.75) internal successors, (1467), 4 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:51,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 750.0) internal successors, (3750), 5 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:51,833 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 750.0) internal successors, (3750), 5 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:51,833 INFO L186 Difference]: Start difference. First operand has 397 places, 1564 transitions, 28870 flow. Second operand 4 states and 1467 transitions. [2021-10-15 19:48:51,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 2240 transitions, 36682 flow [2021-10-15 19:48:52,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 2240 transitions, 35190 flow, removed 194 selfloop flow, removed 2 redundant places. [2021-10-15 19:48:52,042 INFO L242 Difference]: Finished difference. Result has 396 places, 0 transitions, 0 flow [2021-10-15 19:48:52,044 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=25896, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=396, PETRI_TRANSITIONS=0} [2021-10-15 19:48:52,044 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -25 predicate places. [2021-10-15 19:48:52,044 INFO L470 AbstractCegarLoop]: Abstraction has has 396 places, 0 transitions, 0 flow [2021-10-15 19:48:52,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:52,048 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:48:52,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-15 19:48:52,055 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:48:52,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:48:52 BoogieIcfgContainer [2021-10-15 19:48:52,064 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:48:52,065 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:48:52,065 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:48:52,066 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:48:52,066 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:42:32" (3/4) ... [2021-10-15 19:48:52,069 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:48:52,117 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-15 19:48:52,121 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:48:52,124 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:48:52,128 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:48:52,405 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:48:52,406 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:48:52,407 INFO L168 Benchmark]: Toolchain (without parser) took 385846.35 ms. Allocated memory was 107.0 MB in the beginning and 4.2 GB in the end (delta: 4.1 GB). Free memory was 64.1 MB in the beginning and 1.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.4 GB. Max. memory is 16.1 GB. [2021-10-15 19:48:52,408 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 107.0 MB. Free memory is still 85.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:48:52,409 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1648.26 ms. Allocated memory was 107.0 MB in the beginning and 140.5 MB in the end (delta: 33.6 MB). Free memory was 63.9 MB in the beginning and 88.7 MB in the end (delta: -24.7 MB). Peak memory consumption was 32.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:48:52,409 INFO L168 Benchmark]: Boogie Procedure Inliner took 269.36 ms. Allocated memory is still 140.5 MB. Free memory was 88.7 MB in the beginning and 51.3 MB in the end (delta: 37.3 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:48:52,409 INFO L168 Benchmark]: Boogie Preprocessor took 398.06 ms. Allocated memory is still 140.5 MB. Free memory was 51.3 MB in the beginning and 77.9 MB in the end (delta: -26.6 MB). Peak memory consumption was 40.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:48:52,410 INFO L168 Benchmark]: RCFGBuilder took 3836.01 ms. Allocated memory was 140.5 MB in the beginning and 281.0 MB in the end (delta: 140.5 MB). Free memory was 77.9 MB in the beginning and 159.9 MB in the end (delta: -82.0 MB). Peak memory consumption was 82.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:48:52,410 INFO L168 Benchmark]: TraceAbstraction took 379344.41 ms. Allocated memory was 281.0 MB in the beginning and 4.2 GB in the end (delta: 4.0 GB). Free memory was 159.9 MB in the beginning and 1.9 GB in the end (delta: -1.7 GB). Peak memory consumption was 2.5 GB. Max. memory is 16.1 GB. [2021-10-15 19:48:52,411 INFO L168 Benchmark]: Witness Printer took 340.39 ms. Allocated memory is still 4.2 GB. Free memory was 1.9 GB in the beginning and 1.8 GB in the end (delta: 40.3 MB). Peak memory consumption was 41.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:48:52,413 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 107.0 MB. Free memory is still 85.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1648.26 ms. Allocated memory was 107.0 MB in the beginning and 140.5 MB in the end (delta: 33.6 MB). Free memory was 63.9 MB in the beginning and 88.7 MB in the end (delta: -24.7 MB). Peak memory consumption was 32.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 269.36 ms. Allocated memory is still 140.5 MB. Free memory was 88.7 MB in the beginning and 51.3 MB in the end (delta: 37.3 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 398.06 ms. Allocated memory is still 140.5 MB. Free memory was 51.3 MB in the beginning and 77.9 MB in the end (delta: -26.6 MB). Peak memory consumption was 40.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3836.01 ms. Allocated memory was 140.5 MB in the beginning and 281.0 MB in the end (delta: 140.5 MB). Free memory was 77.9 MB in the beginning and 159.9 MB in the end (delta: -82.0 MB). Peak memory consumption was 82.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 379344.41 ms. Allocated memory was 281.0 MB in the beginning and 4.2 GB in the end (delta: 4.0 GB). Free memory was 159.9 MB in the beginning and 1.9 GB in the end (delta: -1.7 GB). Peak memory consumption was 2.5 GB. Max. memory is 16.1 GB. * Witness Printer took 340.39 ms. Allocated memory is still 4.2 GB. Free memory was 1.9 GB in the beginning and 1.8 GB in the end (delta: 40.3 MB). Peak memory consumption was 41.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 155]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 424 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 13.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 379262.9ms, OverallIterations: 18, TraceHistogramMax: 6, EmptinessCheckTime: 0.0ms, AutomataDifference: 368375.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 244.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5449 SDtfs, 4913 SDslu, 0 SDs, 0 SdLazy, 16221 SolverSat, 3196 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 30359.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1282 GetRequests, 1259 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28870occurred in iteration=17, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 783.9ms SsaConstructionTime, 1631.8ms SatisfiabilityAnalysisTime, 6962.8ms InterpolantComputationTime, 9291 NumberOfCodeBlocks, 9291 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 9271 ConstructedInterpolants, 0 QuantifiedInterpolants, 20447 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1497 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 20 InterpolantComputations, 18 PerfectInterpolantSequences, 7914/8408 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:48:52,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30988344-a927-43ed-a845-46955c244850/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...