./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem10_label16.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_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/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_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem10_label16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/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_03ab81df-ebc3-4765-b5a3-b0d810c251f7/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 e305164f412eb6cd5630918171ad02eb287ac8bc ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:17:04,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:17:04,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:17:04,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:17:04,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:17:04,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:17:04,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:17:04,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:17:04,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:17:04,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:17:04,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:17:04,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:17:04,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:17:04,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:17:04,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:17:04,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:17:04,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:17:04,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:17:04,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:17:04,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:17:04,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:17:04,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:17:04,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:17:04,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:17:04,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:17:04,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:17:04,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:17:04,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:17:04,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:17:04,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:17:04,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:17:04,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:17:04,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:17:04,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:17:04,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:17:04,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:17:04,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:17:04,982 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:17:04,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:17:04,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:17:04,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:17:04,986 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:17:05,026 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:17:05,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:17:05,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:17:05,030 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:17:05,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:17:05,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:17:05,033 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:17:05,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:17:05,034 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:17:05,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:17:05,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:17:05,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:17:05,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:17:05,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:17:05,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:17:05,037 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:17:05,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:17:05,037 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:17:05,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:17:05,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:17:05,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:17:05,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:17:05,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:17:05,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:17:05,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:17:05,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:17:05,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:17:05,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:17:05,040 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:17:05,040 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:17:05,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:17:05,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:17:05,041 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_03ab81df-ebc3-4765-b5a3-b0d810c251f7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e305164f412eb6cd5630918171ad02eb287ac8bc [2021-10-15 19:17:05,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:17:05,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:17:05,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:17:05,366 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:17:05,366 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:17:05,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem10_label16.c [2021-10-15 19:17:05,454 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/data/74c63982c/803a7eee7aaa4e3892afddaafd852b21/FLAGc975247f1 [2021-10-15 19:17:05,998 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:17:05,998 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/sv-benchmarks/c/eca-rers2012/Problem10_label16.c [2021-10-15 19:17:06,012 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/data/74c63982c/803a7eee7aaa4e3892afddaafd852b21/FLAGc975247f1 [2021-10-15 19:17:06,257 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/data/74c63982c/803a7eee7aaa4e3892afddaafd852b21 [2021-10-15 19:17:06,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:17:06,261 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:17:06,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:17:06,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:17:06,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:17:06,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:17:06" (1/1) ... [2021-10-15 19:17:06,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561df86e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:06, skipping insertion in model container [2021-10-15 19:17:06,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:17:06" (1/1) ... [2021-10-15 19:17:06,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:17:06,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:17:06,576 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_03ab81df-ebc3-4765-b5a3-b0d810c251f7/sv-benchmarks/c/eca-rers2012/Problem10_label16.c[3920,3933] [2021-10-15 19:17:06,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:17:06,781 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:17:06,815 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_03ab81df-ebc3-4765-b5a3-b0d810c251f7/sv-benchmarks/c/eca-rers2012/Problem10_label16.c[3920,3933] [2021-10-15 19:17:06,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:17:06,963 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:17:06,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:06 WrapperNode [2021-10-15 19:17:06,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:17:06,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:17:06,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:17:06,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:17:06,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:06" (1/1) ... [2021-10-15 19:17:06,998 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:06" (1/1) ... [2021-10-15 19:17:07,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:17:07,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:17:07,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:17:07,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:17:07,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:06" (1/1) ... [2021-10-15 19:17:07,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:06" (1/1) ... [2021-10-15 19:17:07,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:06" (1/1) ... [2021-10-15 19:17:07,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:06" (1/1) ... [2021-10-15 19:17:07,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:06" (1/1) ... [2021-10-15 19:17:07,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:06" (1/1) ... [2021-10-15 19:17:07,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:06" (1/1) ... [2021-10-15 19:17:07,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:17:07,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:17:07,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:17:07,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:17:07,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:06" (1/1) ... [2021-10-15 19:17:07,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:17:07,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:17:07,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:17:07,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:17:07,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:17:07,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:17:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:17:07,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:17:08,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:17:08,589 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:17:08,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:17:08 BoogieIcfgContainer [2021-10-15 19:17:08,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:17:08,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:17:08,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:17:08,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:17:08,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:17:06" (1/3) ... [2021-10-15 19:17:08,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6193e9d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:17:08, skipping insertion in model container [2021-10-15 19:17:08,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:06" (2/3) ... [2021-10-15 19:17:08,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6193e9d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:17:08, skipping insertion in model container [2021-10-15 19:17:08,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:17:08" (3/3) ... [2021-10-15 19:17:08,603 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10_label16.c [2021-10-15 19:17:08,608 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:17:08,608 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:17:08,646 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:17:08,652 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 19:17:08,653 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:17:08,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 206 places, 344 transitions, 688 flow [2021-10-15 19:17:08,745 INFO L129 PetriNetUnfolder]: 139/344 cut-off events. [2021-10-15 19:17:08,746 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:17:08,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 344 events. 139/344 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 210 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2021-10-15 19:17:08,748 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 344 transitions, 688 flow [2021-10-15 19:17:08,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 339 transitions, 678 flow [2021-10-15 19:17:08,780 INFO L129 PetriNetUnfolder]: 28/88 cut-off events. [2021-10-15 19:17:08,780 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:17:08,781 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:17:08,781 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] [2021-10-15 19:17:08,782 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:17:08,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:17:08,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2113343065, now seen corresponding path program 1 times [2021-10-15 19:17:08,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:17:08,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527982240] [2021-10-15 19:17:08,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:08,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:17:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:09,131 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 19:17:09,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:17:09,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527982240] [2021-10-15 19:17:09,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527982240] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:17:09,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:17:09,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:17:09,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824937951] [2021-10-15 19:17:09,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:17:09,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:17:09,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:17:09,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:17:09,184 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:17:09,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 339 transitions, 678 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 19:17:09,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:17:09,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:17:09,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:17:10,069 INFO L129 PetriNetUnfolder]: 152/493 cut-off events. [2021-10-15 19:17:10,070 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:17:10,074 INFO L84 FinitePrefix]: Finished finitePrefix Result has 980 conditions, 493 events. 152/493 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 552 event pairs, 0 based on Foata normal form. 61/342 useless extension candidates. Maximal degree in co-relation 1. Up to 257 conditions per place. [2021-10-15 19:17:10,081 INFO L132 encePairwiseOnDemand]: 146/344 looper letters, 348 selfloop transitions, 76 changer transitions 61/490 dead transitions. [2021-10-15 19:17:10,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 490 transitions, 1950 flow [2021-10-15 19:17:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:17:10,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:17:10,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2021-10-15 19:17:10,105 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2021-10-15 19:17:10,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2021-10-15 19:17:10,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2021-10-15 19:17:10,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:17:10,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2021-10-15 19:17:10,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 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 19:17:10,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:10,132 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:10,134 INFO L186 Difference]: Start difference. First operand has 203 places, 339 transitions, 678 flow. Second operand 3 states and 630 transitions. [2021-10-15 19:17:10,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 490 transitions, 1950 flow [2021-10-15 19:17:10,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 490 transitions, 1950 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:17:10,161 INFO L242 Difference]: Finished difference. Result has 207 places, 293 transitions, 1042 flow [2021-10-15 19:17:10,164 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1042, PETRI_PLACES=207, PETRI_TRANSITIONS=293} [2021-10-15 19:17:10,165 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, 4 predicate places. [2021-10-15 19:17:10,165 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 293 transitions, 1042 flow [2021-10-15 19:17:10,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 19:17:10,166 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:17:10,167 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:10,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:17:10,167 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:17:10,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:17:10,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1944473713, now seen corresponding path program 1 times [2021-10-15 19:17:10,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:17:10,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755049802] [2021-10-15 19:17:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:10,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:17:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:17:10,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:17:10,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755049802] [2021-10-15 19:17:10,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755049802] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:17:10,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:17:10,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:17:10,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123298447] [2021-10-15 19:17:10,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:17:10,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:17:10,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:17:10,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:17:10,443 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:17:10,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 293 transitions, 1042 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 19:17:10,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:17:10,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:17:10,444 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:17:11,091 INFO L129 PetriNetUnfolder]: 186/606 cut-off events. [2021-10-15 19:17:11,092 INFO L130 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2021-10-15 19:17:11,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 606 events. 186/606 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 736 event pairs, 0 based on Foata normal form. 40/646 useless extension candidates. Maximal degree in co-relation 812. Up to 458 conditions per place. [2021-10-15 19:17:11,098 INFO L132 encePairwiseOnDemand]: 269/344 looper letters, 424 selfloop transitions, 35 changer transitions 0/464 dead transitions. [2021-10-15 19:17:11,098 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 464 transitions, 2386 flow [2021-10-15 19:17:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:17:11,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:17:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2021-10-15 19:17:11,102 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2021-10-15 19:17:11,102 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2021-10-15 19:17:11,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2021-10-15 19:17:11,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:17:11,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2021-10-15 19:17:11,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 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 19:17:11,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:11,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:11,112 INFO L186 Difference]: Start difference. First operand has 207 places, 293 transitions, 1042 flow. Second operand 3 states and 448 transitions. [2021-10-15 19:17:11,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 464 transitions, 2386 flow [2021-10-15 19:17:11,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 464 transitions, 2220 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:17:11,142 INFO L242 Difference]: Finished difference. Result has 148 places, 327 transitions, 1279 flow [2021-10-15 19:17:11,143 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1279, PETRI_PLACES=148, PETRI_TRANSITIONS=327} [2021-10-15 19:17:11,143 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -55 predicate places. [2021-10-15 19:17:11,144 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 327 transitions, 1279 flow [2021-10-15 19:17:11,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 19:17:11,144 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:17:11,145 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:11,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:17:11,145 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:17:11,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:17:11,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1251471776, now seen corresponding path program 1 times [2021-10-15 19:17:11,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:17:11,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832341909] [2021-10-15 19:17:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:11,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:17:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:17:11,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:17:11,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832341909] [2021-10-15 19:17:11,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832341909] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:17:11,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:17:11,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:17:11,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868554922] [2021-10-15 19:17:11,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:17:11,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:17:11,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:17:11,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:17:11,233 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:17:11,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 327 transitions, 1279 flow. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 19:17:11,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:17:11,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:17:11,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:17:11,904 INFO L129 PetriNetUnfolder]: 261/820 cut-off events. [2021-10-15 19:17:11,904 INFO L130 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2021-10-15 19:17:11,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2036 conditions, 820 events. 261/820 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1363 event pairs, 0 based on Foata normal form. 1/821 useless extension candidates. Maximal degree in co-relation 574. Up to 645 conditions per place. [2021-10-15 19:17:11,911 INFO L132 encePairwiseOnDemand]: 267/344 looper letters, 447 selfloop transitions, 86 changer transitions 0/538 dead transitions. [2021-10-15 19:17:11,911 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 538 transitions, 2917 flow [2021-10-15 19:17:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:17:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:17:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2021-10-15 19:17:11,914 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43507751937984496 [2021-10-15 19:17:11,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2021-10-15 19:17:11,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2021-10-15 19:17:11,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:17:11,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2021-10-15 19:17:11,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 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 19:17:11,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:11,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:11,921 INFO L186 Difference]: Start difference. First operand has 148 places, 327 transitions, 1279 flow. Second operand 3 states and 449 transitions. [2021-10-15 19:17:11,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 538 transitions, 2917 flow [2021-10-15 19:17:11,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 538 transitions, 2882 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:17:11,945 INFO L242 Difference]: Finished difference. Result has 151 places, 402 transitions, 2040 flow [2021-10-15 19:17:11,946 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2040, PETRI_PLACES=151, PETRI_TRANSITIONS=402} [2021-10-15 19:17:11,947 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -52 predicate places. [2021-10-15 19:17:11,947 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 402 transitions, 2040 flow [2021-10-15 19:17:11,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 19:17:11,947 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:17:11,948 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:11,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:17:11,948 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:17:11,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:17:11,949 INFO L82 PathProgramCache]: Analyzing trace with hash -667376494, now seen corresponding path program 1 times [2021-10-15 19:17:11,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:17:11,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904243624] [2021-10-15 19:17:11,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:11,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:17:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:17:12,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:17:12,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904243624] [2021-10-15 19:17:12,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904243624] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:17:12,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:17:12,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:17:12,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601941381] [2021-10-15 19:17:12,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:17:12,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:17:12,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:17:12,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:17:12,123 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 344 [2021-10-15 19:17:12,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 402 transitions, 2040 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 19:17:12,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:17:12,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 344 [2021-10-15 19:17:12,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:17:12,966 INFO L129 PetriNetUnfolder]: 231/801 cut-off events. [2021-10-15 19:17:12,967 INFO L130 PetriNetUnfolder]: For 459/459 co-relation queries the response was YES. [2021-10-15 19:17:12,968 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2145 conditions, 801 events. 231/801 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1100 event pairs, 0 based on Foata normal form. 30/831 useless extension candidates. Maximal degree in co-relation 1403. Up to 462 conditions per place. [2021-10-15 19:17:12,974 INFO L132 encePairwiseOnDemand]: 274/344 looper letters, 319 selfloop transitions, 189 changer transitions 0/512 dead transitions. [2021-10-15 19:17:12,974 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 512 transitions, 3148 flow [2021-10-15 19:17:12,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:17:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:17:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 423 transitions. [2021-10-15 19:17:12,977 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.24593023255813953 [2021-10-15 19:17:12,978 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 423 transitions. [2021-10-15 19:17:12,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 423 transitions. [2021-10-15 19:17:12,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:17:12,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 423 transitions. [2021-10-15 19:17:12,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.6) internal successors, (423), 5 states have internal predecessors, (423), 0 states have call successors, (0), 0 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 19:17:12,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 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 19:17:12,986 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 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 19:17:12,986 INFO L186 Difference]: Start difference. First operand has 151 places, 402 transitions, 2040 flow. Second operand 5 states and 423 transitions. [2021-10-15 19:17:12,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 512 transitions, 3148 flow [2021-10-15 19:17:13,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 512 transitions, 2940 flow, removed 21 selfloop flow, removed 2 redundant places. [2021-10-15 19:17:13,039 INFO L242 Difference]: Finished difference. Result has 156 places, 376 transitions, 2231 flow [2021-10-15 19:17:13,040 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2231, PETRI_PLACES=156, PETRI_TRANSITIONS=376} [2021-10-15 19:17:13,040 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -47 predicate places. [2021-10-15 19:17:13,040 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 376 transitions, 2231 flow [2021-10-15 19:17:13,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 19:17:13,041 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:17:13,041 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 19:17:13,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:17:13,042 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:17:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:17:13,042 INFO L82 PathProgramCache]: Analyzing trace with hash -436614883, now seen corresponding path program 1 times [2021-10-15 19:17:13,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:17:13,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7536991] [2021-10-15 19:17:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:13,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:17:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:17:13,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:17:13,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7536991] [2021-10-15 19:17:13,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7536991] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:17:13,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:17:13,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:17:13,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334931668] [2021-10-15 19:17:13,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:17:13,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:17:13,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:17:13,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:17:13,225 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:17:13,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 376 transitions, 2231 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 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 19:17:13,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:17:13,229 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:17:13,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:17:14,066 INFO L129 PetriNetUnfolder]: 261/1251 cut-off events. [2021-10-15 19:17:14,066 INFO L130 PetriNetUnfolder]: For 2256/2256 co-relation queries the response was YES. [2021-10-15 19:17:14,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3230 conditions, 1251 events. 261/1251 cut-off events. For 2256/2256 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3150 event pairs, 0 based on Foata normal form. 196/1447 useless extension candidates. Maximal degree in co-relation 1930. Up to 731 conditions per place. [2021-10-15 19:17:14,075 INFO L132 encePairwiseOnDemand]: 268/344 looper letters, 465 selfloop transitions, 70 changer transitions 0/542 dead transitions. [2021-10-15 19:17:14,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 542 transitions, 3825 flow [2021-10-15 19:17:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:17:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:17:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2021-10-15 19:17:14,078 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43507751937984496 [2021-10-15 19:17:14,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2021-10-15 19:17:14,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2021-10-15 19:17:14,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:17:14,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2021-10-15 19:17:14,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 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 19:17:14,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:14,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:14,085 INFO L186 Difference]: Start difference. First operand has 156 places, 376 transitions, 2231 flow. Second operand 3 states and 449 transitions. [2021-10-15 19:17:14,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 542 transitions, 3825 flow [2021-10-15 19:17:14,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 542 transitions, 3819 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:17:14,125 INFO L242 Difference]: Finished difference. Result has 159 places, 406 transitions, 3129 flow [2021-10-15 19:17:14,126 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3129, PETRI_PLACES=159, PETRI_TRANSITIONS=406} [2021-10-15 19:17:14,126 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -44 predicate places. [2021-10-15 19:17:14,126 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 406 transitions, 3129 flow [2021-10-15 19:17:14,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 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 19:17:14,127 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:17:14,127 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 19:17:14,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:17:14,128 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:17:14,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:17:14,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1770062897, now seen corresponding path program 1 times [2021-10-15 19:17:14,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:17:14,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864382213] [2021-10-15 19:17:14,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:14,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:17:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:17:14,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:17:14,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864382213] [2021-10-15 19:17:14,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864382213] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:17:14,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:17:14,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:17:14,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634865436] [2021-10-15 19:17:14,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:17:14,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:17:14,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:17:14,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:17:14,347 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:17:14,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 406 transitions, 3129 flow. Second operand has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 19:17:14,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:17:14,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:17:14,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:17:15,439 INFO L129 PetriNetUnfolder]: 260/1305 cut-off events. [2021-10-15 19:17:15,439 INFO L130 PetriNetUnfolder]: For 2492/2492 co-relation queries the response was YES. [2021-10-15 19:17:15,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3665 conditions, 1305 events. 260/1305 cut-off events. For 2492/2492 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3032 event pairs, 0 based on Foata normal form. 1/1306 useless extension candidates. Maximal degree in co-relation 2023. Up to 1210 conditions per place. [2021-10-15 19:17:15,449 INFO L132 encePairwiseOnDemand]: 338/344 looper letters, 394 selfloop transitions, 1 changer transitions 55/457 dead transitions. [2021-10-15 19:17:15,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 457 transitions, 4131 flow [2021-10-15 19:17:15,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:17:15,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:17:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 321 transitions. [2021-10-15 19:17:15,453 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.13330564784053156 [2021-10-15 19:17:15,453 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 321 transitions. [2021-10-15 19:17:15,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 321 transitions. [2021-10-15 19:17:15,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:17:15,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 321 transitions. [2021-10-15 19:17:15,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 45.857142857142854) internal successors, (321), 7 states have internal predecessors, (321), 0 states have call successors, (0), 0 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 19:17:15,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 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 19:17:15,462 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 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 19:17:15,462 INFO L186 Difference]: Start difference. First operand has 159 places, 406 transitions, 3129 flow. Second operand 7 states and 321 transitions. [2021-10-15 19:17:15,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 457 transitions, 4131 flow [2021-10-15 19:17:15,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 457 transitions, 3971 flow, removed 10 selfloop flow, removed 2 redundant places. [2021-10-15 19:17:15,543 INFO L242 Difference]: Finished difference. Result has 167 places, 402 transitions, 2949 flow [2021-10-15 19:17:15,544 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=2969, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2949, PETRI_PLACES=167, PETRI_TRANSITIONS=402} [2021-10-15 19:17:15,544 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -36 predicate places. [2021-10-15 19:17:15,545 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 402 transitions, 2949 flow [2021-10-15 19:17:15,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 19:17:15,545 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:17:15,546 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 19:17:15,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:17:15,547 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:17:15,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:17:15,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1736765877, now seen corresponding path program 1 times [2021-10-15 19:17:15,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:17:15,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569269551] [2021-10-15 19:17:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:15,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:17:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:17:15,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:17:15,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569269551] [2021-10-15 19:17:15,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569269551] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:17:15,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:17:15,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:17:15,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859951450] [2021-10-15 19:17:15,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:17:15,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:17:15,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:17:15,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:17:15,678 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:17:15,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 402 transitions, 2949 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 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 19:17:15,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:17:15,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:17:15,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:17:16,703 INFO L129 PetriNetUnfolder]: 327/1598 cut-off events. [2021-10-15 19:17:16,704 INFO L130 PetriNetUnfolder]: For 3415/3415 co-relation queries the response was YES. [2021-10-15 19:17:16,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4460 conditions, 1598 events. 327/1598 cut-off events. For 3415/3415 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4217 event pairs, 0 based on Foata normal form. 79/1677 useless extension candidates. Maximal degree in co-relation 4439. Up to 1190 conditions per place. [2021-10-15 19:17:16,718 INFO L132 encePairwiseOnDemand]: 269/344 looper letters, 492 selfloop transitions, 109 changer transitions 0/608 dead transitions. [2021-10-15 19:17:16,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 608 transitions, 5149 flow [2021-10-15 19:17:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:17:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:17:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2021-10-15 19:17:16,721 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2021-10-15 19:17:16,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2021-10-15 19:17:16,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2021-10-15 19:17:16,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:17:16,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2021-10-15 19:17:16,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 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 19:17:16,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:16,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:16,729 INFO L186 Difference]: Start difference. First operand has 167 places, 402 transitions, 2949 flow. Second operand 3 states and 447 transitions. [2021-10-15 19:17:16,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 608 transitions, 5149 flow [2021-10-15 19:17:16,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 608 transitions, 5132 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-10-15 19:17:16,784 INFO L242 Difference]: Finished difference. Result has 162 places, 472 transitions, 4358 flow [2021-10-15 19:17:16,785 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=2940, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4358, PETRI_PLACES=162, PETRI_TRANSITIONS=472} [2021-10-15 19:17:16,785 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -41 predicate places. [2021-10-15 19:17:16,791 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 472 transitions, 4358 flow [2021-10-15 19:17:16,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 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 19:17:16,792 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:17:16,792 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 19:17:16,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:17:16,792 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:17:16,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:17:16,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1130606414, now seen corresponding path program 1 times [2021-10-15 19:17:16,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:17:16,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393831772] [2021-10-15 19:17:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:16,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:17:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 76 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:17:17,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:17:17,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393831772] [2021-10-15 19:17:17,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393831772] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:17:17,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721702373] [2021-10-15 19:17:17,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:17,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:17:17,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:17:17,033 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:17:17,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:17:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:17,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:17:17,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:17:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-10-15 19:17:18,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721702373] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:17:18,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:17:18,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-10-15 19:17:18,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071830400] [2021-10-15 19:17:18,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:17:18,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:17:18,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:17:18,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:17:18,122 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:17:18,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 472 transitions, 4358 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 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 19:17:18,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:17:18,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:17:18,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:17:19,338 INFO L129 PetriNetUnfolder]: 321/1876 cut-off events. [2021-10-15 19:17:19,338 INFO L130 PetriNetUnfolder]: For 6162/6162 co-relation queries the response was YES. [2021-10-15 19:17:19,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5322 conditions, 1876 events. 321/1876 cut-off events. For 6162/6162 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5978 event pairs, 0 based on Foata normal form. 115/1991 useless extension candidates. Maximal degree in co-relation 5304. Up to 1502 conditions per place. [2021-10-15 19:17:19,351 INFO L132 encePairwiseOnDemand]: 269/344 looper letters, 479 selfloop transitions, 116 changer transitions 0/602 dead transitions. [2021-10-15 19:17:19,352 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 602 transitions, 5798 flow [2021-10-15 19:17:19,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:17:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:17:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2021-10-15 19:17:19,358 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4321705426356589 [2021-10-15 19:17:19,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2021-10-15 19:17:19,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2021-10-15 19:17:19,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:17:19,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2021-10-15 19:17:19,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 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 19:17:19,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:19,364 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:19,364 INFO L186 Difference]: Start difference. First operand has 162 places, 472 transitions, 4358 flow. Second operand 3 states and 446 transitions. [2021-10-15 19:17:19,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 602 transitions, 5798 flow [2021-10-15 19:17:19,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 602 transitions, 5388 flow, removed 103 selfloop flow, removed 2 redundant places. [2021-10-15 19:17:19,425 INFO L242 Difference]: Finished difference. Result has 164 places, 466 transitions, 4534 flow [2021-10-15 19:17:19,426 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=3180, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4534, PETRI_PLACES=164, PETRI_TRANSITIONS=466} [2021-10-15 19:17:19,426 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -39 predicate places. [2021-10-15 19:17:19,427 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 466 transitions, 4534 flow [2021-10-15 19:17:19,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 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 19:17:19,427 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:17:19,428 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 19:17:19,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-15 19:17:19,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:17:19,654 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:17:19,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:17:19,654 INFO L82 PathProgramCache]: Analyzing trace with hash -23855663, now seen corresponding path program 1 times [2021-10-15 19:17:19,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:17:19,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067149591] [2021-10-15 19:17:19,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:19,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:17:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 61 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:17:19,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:17:19,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067149591] [2021-10-15 19:17:19,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067149591] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:17:19,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686806997] [2021-10-15 19:17:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:19,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:17:19,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:17:19,937 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:17:19,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:17:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:20,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:17:20,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:17:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-10-15 19:17:20,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686806997] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:17:20,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:17:20,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 19:17:20,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572516134] [2021-10-15 19:17:20,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:17:20,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:17:20,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:17:20,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:17:20,945 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:17:20,945 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 466 transitions, 4534 flow. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 19:17:20,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:17:20,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:17:20,946 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:17:22,257 INFO L129 PetriNetUnfolder]: 428/2406 cut-off events. [2021-10-15 19:17:22,257 INFO L130 PetriNetUnfolder]: For 7365/7365 co-relation queries the response was YES. [2021-10-15 19:17:22,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7007 conditions, 2406 events. 428/2406 cut-off events. For 7365/7365 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 8585 event pairs, 0 based on Foata normal form. 41/2447 useless extension candidates. Maximal degree in co-relation 6986. Up to 1858 conditions per place. [2021-10-15 19:17:22,273 INFO L132 encePairwiseOnDemand]: 289/344 looper letters, 542 selfloop transitions, 160 changer transitions 0/709 dead transitions. [2021-10-15 19:17:22,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 709 transitions, 7566 flow [2021-10-15 19:17:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:17:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:17:22,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2021-10-15 19:17:22,276 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40891472868217055 [2021-10-15 19:17:22,276 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2021-10-15 19:17:22,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2021-10-15 19:17:22,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:17:22,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2021-10-15 19:17:22,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 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 19:17:22,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:22,281 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:22,281 INFO L186 Difference]: Start difference. First operand has 164 places, 466 transitions, 4534 flow. Second operand 3 states and 422 transitions. [2021-10-15 19:17:22,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 709 transitions, 7566 flow [2021-10-15 19:17:22,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 709 transitions, 7106 flow, removed 109 selfloop flow, removed 2 redundant places. [2021-10-15 19:17:22,403 INFO L242 Difference]: Finished difference. Result has 166 places, 573 transitions, 6328 flow [2021-10-15 19:17:22,404 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=3938, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=6328, PETRI_PLACES=166, PETRI_TRANSITIONS=573} [2021-10-15 19:17:22,404 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -37 predicate places. [2021-10-15 19:17:22,404 INFO L470 AbstractCegarLoop]: Abstraction has has 166 places, 573 transitions, 6328 flow [2021-10-15 19:17:22,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 19:17:22,406 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:17:22,407 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:17:22,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:17:22,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:17:22,618 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:17:22,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:17:22,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1412151866, now seen corresponding path program 1 times [2021-10-15 19:17:22,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:17:22,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200974438] [2021-10-15 19:17:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:22,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:17:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 292 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:17:22,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:17:22,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200974438] [2021-10-15 19:17:22,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200974438] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:17:22,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339235669] [2021-10-15 19:17:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:22,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:17:22,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:17:22,877 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:17:22,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:17:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:23,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:17:23,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:17:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-10-15 19:17:23,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339235669] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:17:23,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:17:23,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 19:17:23,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118320336] [2021-10-15 19:17:23,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:17:23,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:17:23,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:17:23,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:17:23,874 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:17:23,875 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 573 transitions, 6328 flow. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 19:17:23,875 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:17:23,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:17:23,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:17:25,771 INFO L129 PetriNetUnfolder]: 568/3812 cut-off events. [2021-10-15 19:17:25,771 INFO L130 PetriNetUnfolder]: For 13242/13242 co-relation queries the response was YES. [2021-10-15 19:17:25,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10834 conditions, 3812 events. 568/3812 cut-off events. For 13242/13242 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 18307 event pairs, 0 based on Foata normal form. 121/3933 useless extension candidates. Maximal degree in co-relation 10811. Up to 2251 conditions per place. [2021-10-15 19:17:25,794 INFO L132 encePairwiseOnDemand]: 274/344 looper letters, 607 selfloop transitions, 235 changer transitions 0/849 dead transitions. [2021-10-15 19:17:25,794 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 849 transitions, 10276 flow [2021-10-15 19:17:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:17:25,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:17:25,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2021-10-15 19:17:25,797 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2021-10-15 19:17:25,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2021-10-15 19:17:25,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2021-10-15 19:17:25,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:17:25,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2021-10-15 19:17:25,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 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 19:17:25,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:25,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:17:25,802 INFO L186 Difference]: Start difference. First operand has 166 places, 573 transitions, 6328 flow. Second operand 3 states and 441 transitions. [2021-10-15 19:17:25,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 849 transitions, 10276 flow [2021-10-15 19:17:25,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 849 transitions, 9198 flow, removed 323 selfloop flow, removed 2 redundant places. [2021-10-15 19:17:25,892 INFO L242 Difference]: Finished difference. Result has 168 places, 707 transitions, 8542 flow [2021-10-15 19:17:25,893 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=5534, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8542, PETRI_PLACES=168, PETRI_TRANSITIONS=707} [2021-10-15 19:17:25,893 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -35 predicate places. [2021-10-15 19:17:25,894 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 707 transitions, 8542 flow [2021-10-15 19:17:25,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 19:17:25,894 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:17:25,894 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:17:25,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:17:26,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:17:26,096 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:17:26,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:17:26,096 INFO L82 PathProgramCache]: Analyzing trace with hash -593998242, now seen corresponding path program 1 times [2021-10-15 19:17:26,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:17:26,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833812891] [2021-10-15 19:17:26,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:26,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:17:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-10-15 19:17:26,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:17:26,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833812891] [2021-10-15 19:17:26,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833812891] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:17:26,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:17:26,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:17:26,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589877226] [2021-10-15 19:17:26,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:17:26,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:17:26,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:17:26,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:17:26,431 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:17:26,432 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 707 transitions, 8542 flow. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 19:17:26,432 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:17:26,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:17:26,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:17:28,462 INFO L129 PetriNetUnfolder]: 518/3626 cut-off events. [2021-10-15 19:17:28,462 INFO L130 PetriNetUnfolder]: For 10782/10782 co-relation queries the response was YES. [2021-10-15 19:17:28,465 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10363 conditions, 3626 events. 518/3626 cut-off events. For 10782/10782 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 17269 event pairs, 0 based on Foata normal form. 1/3627 useless extension candidates. Maximal degree in co-relation 10340. Up to 3509 conditions per place. [2021-10-15 19:17:28,470 INFO L132 encePairwiseOnDemand]: 341/344 looper letters, 0 selfloop transitions, 0 changer transitions 660/660 dead transitions. [2021-10-15 19:17:28,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 660 transitions, 9218 flow [2021-10-15 19:17:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:17:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:17:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 248 transitions. [2021-10-15 19:17:28,472 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.18023255813953487 [2021-10-15 19:17:28,472 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 248 transitions. [2021-10-15 19:17:28,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 248 transitions. [2021-10-15 19:17:28,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:17:28,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 248 transitions. [2021-10-15 19:17:28,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 19:17:28,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 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 19:17:28,476 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 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 19:17:28,476 INFO L186 Difference]: Start difference. First operand has 168 places, 707 transitions, 8542 flow. Second operand 4 states and 248 transitions. [2021-10-15 19:17:28,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 660 transitions, 9218 flow [2021-10-15 19:17:28,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 660 transitions, 8788 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:17:28,549 INFO L242 Difference]: Finished difference. Result has 167 places, 0 transitions, 0 flow [2021-10-15 19:17:28,549 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=7472, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=167, PETRI_TRANSITIONS=0} [2021-10-15 19:17:28,550 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -36 predicate places. [2021-10-15 19:17:28,550 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 0 transitions, 0 flow [2021-10-15 19:17:28,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 19:17:28,552 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:17:28,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:17:28,555 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:17:28,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:17:28 BoogieIcfgContainer [2021-10-15 19:17:28,560 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:17:28,560 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:17:28,560 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:17:28,560 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:17:28,561 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:17:08" (3/4) ... [2021-10-15 19:17:28,563 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:17:28,581 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:17:28,582 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:17:28,584 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:17:28,585 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:17:28,692 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:17:28,692 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:17:28,694 INFO L168 Benchmark]: Toolchain (without parser) took 22431.97 ms. Allocated memory was 86.0 MB in the beginning and 375.4 MB in the end (delta: 289.4 MB). Free memory was 45.4 MB in the beginning and 176.3 MB in the end (delta: -130.9 MB). Peak memory consumption was 161.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:17:28,694 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 86.0 MB. Free memory is still 63.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:17:28,694 INFO L168 Benchmark]: CACSL2BoogieTranslator took 687.72 ms. Allocated memory was 86.0 MB in the beginning and 107.0 MB in the end (delta: 21.0 MB). Free memory was 45.1 MB in the beginning and 61.2 MB in the end (delta: -16.1 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:17:28,695 INFO L168 Benchmark]: Boogie Procedure Inliner took 101.31 ms. Allocated memory is still 107.0 MB. Free memory was 61.2 MB in the beginning and 53.5 MB in the end (delta: 7.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:17:28,695 INFO L168 Benchmark]: Boogie Preprocessor took 103.74 ms. Allocated memory is still 107.0 MB. Free memory was 53.5 MB in the beginning and 78.5 MB in the end (delta: -25.1 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:17:28,695 INFO L168 Benchmark]: RCFGBuilder took 1414.42 ms. Allocated memory is still 107.0 MB. Free memory was 78.5 MB in the beginning and 63.4 MB in the end (delta: 15.2 MB). Peak memory consumption was 47.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:17:28,696 INFO L168 Benchmark]: TraceAbstraction took 19964.33 ms. Allocated memory was 107.0 MB in the beginning and 375.4 MB in the end (delta: 268.4 MB). Free memory was 62.5 MB in the beginning and 191.3 MB in the end (delta: -128.8 MB). Peak memory consumption was 256.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:17:28,696 INFO L168 Benchmark]: Witness Printer took 132.02 ms. Allocated memory is still 375.4 MB. Free memory was 191.3 MB in the beginning and 176.3 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:17:28,698 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 86.0 MB. Free memory is still 63.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 687.72 ms. Allocated memory was 86.0 MB in the beginning and 107.0 MB in the end (delta: 21.0 MB). Free memory was 45.1 MB in the beginning and 61.2 MB in the end (delta: -16.1 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 101.31 ms. Allocated memory is still 107.0 MB. Free memory was 61.2 MB in the beginning and 53.5 MB in the end (delta: 7.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 103.74 ms. Allocated memory is still 107.0 MB. Free memory was 53.5 MB in the beginning and 78.5 MB in the end (delta: -25.1 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1414.42 ms. Allocated memory is still 107.0 MB. Free memory was 78.5 MB in the beginning and 63.4 MB in the end (delta: 15.2 MB). Peak memory consumption was 47.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19964.33 ms. Allocated memory was 107.0 MB in the beginning and 375.4 MB in the end (delta: 268.4 MB). Free memory was 62.5 MB in the beginning and 191.3 MB in the end (delta: -128.8 MB). Peak memory consumption was 256.7 MB. Max. memory is 16.1 GB. * Witness Printer took 132.02 ms. Allocated memory is still 375.4 MB. Free memory was 191.3 MB in the beginning and 176.3 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 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: 113]: 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, 206 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 20.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 19913.2ms, OverallIterations: 11, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 13456.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 106.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 787 SDtfs, 1103 SDslu, 3 SDs, 0 SdLazy, 4812 SolverSat, 747 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4609.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 913 GetRequests, 884 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 202.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8542occurred in iteration=10, InterpolantAutomatonStates: 40, 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: 191.3ms SsaConstructionTime, 654.0ms SatisfiabilityAnalysisTime, 4184.7ms InterpolantComputationTime, 3053 NumberOfCodeBlocks, 3053 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 3039 ConstructedInterpolants, 0 QuantifiedInterpolants, 17758 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1261 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 14 InterpolantComputations, 11 PerfectInterpolantSequences, 1964/2218 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 19:17:28,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03ab81df-ebc3-4765-b5a3-b0d810c251f7/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...