./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.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_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/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_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/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_11237fca-e8db-45d3-aead-54c6a9d5b843/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 53dcb69f627138722ce52a98a0a9dfaad75b3a87 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:07:24,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:07:24,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:07:24,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:07:24,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:07:24,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:07:24,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:07:24,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:07:24,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:07:24,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:07:24,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:07:24,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:07:24,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:07:24,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:07:24,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:07:24,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:07:24,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:07:24,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:07:24,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:07:24,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:07:24,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:07:24,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:07:24,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:07:24,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:07:24,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:07:24,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:07:24,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:07:24,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:07:24,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:07:24,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:07:24,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:07:24,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:07:24,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:07:24,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:07:24,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:07:24,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:07:24,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:07:24,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:07:24,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:07:24,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:07:24,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:07:24,931 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:07:24,990 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:07:24,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:07:24,992 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:07:24,992 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:07:25,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:07:25,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:07:25,002 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:07:25,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:07:25,003 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:07:25,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:07:25,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:07:25,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:07:25,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:07:25,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:07:25,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:07:25,006 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:07:25,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:07:25,007 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:07:25,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:07:25,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:07:25,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:07:25,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:07:25,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:07:25,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:07:25,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:07:25,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:07:25,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:07:25,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:07:25,010 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:07:25,012 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:07:25,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:07:25,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:07:25,013 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_11237fca-e8db-45d3-aead-54c6a9d5b843/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53dcb69f627138722ce52a98a0a9dfaad75b3a87 [2021-10-15 20:07:25,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:07:25,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:07:25,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:07:25,478 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:07:25,479 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:07:25,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c [2021-10-15 20:07:25,580 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/data/a58bbf5df/7e91521daff84cb8b8fb0d07057231bf/FLAG577e079e5 [2021-10-15 20:07:26,395 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:07:26,401 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c [2021-10-15 20:07:26,433 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/data/a58bbf5df/7e91521daff84cb8b8fb0d07057231bf/FLAG577e079e5 [2021-10-15 20:07:26,617 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/data/a58bbf5df/7e91521daff84cb8b8fb0d07057231bf [2021-10-15 20:07:26,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:07:26,621 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:07:26,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:07:26,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:07:26,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:07:26,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:07:26" (1/1) ... [2021-10-15 20:07:26,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@683042d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:26, skipping insertion in model container [2021-10-15 20:07:26,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:07:26" (1/1) ... [2021-10-15 20:07:26,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:07:26,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:07:27,130 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_11237fca-e8db-45d3-aead-54c6a9d5b843/sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c[18691,18704] [2021-10-15 20:07:27,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:07:27,146 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:07:27,296 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_11237fca-e8db-45d3-aead-54c6a9d5b843/sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c[18691,18704] [2021-10-15 20:07:27,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:07:27,320 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:07:27,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:27 WrapperNode [2021-10-15 20:07:27,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:07:27,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:07:27,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:07:27,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:07:27,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:27" (1/1) ... [2021-10-15 20:07:27,365 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:27" (1/1) ... [2021-10-15 20:07:27,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:07:27,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:07:27,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:07:27,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:07:27,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:27" (1/1) ... [2021-10-15 20:07:27,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:27" (1/1) ... [2021-10-15 20:07:27,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:27" (1/1) ... [2021-10-15 20:07:27,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:27" (1/1) ... [2021-10-15 20:07:27,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:27" (1/1) ... [2021-10-15 20:07:27,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:27" (1/1) ... [2021-10-15 20:07:27,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:27" (1/1) ... [2021-10-15 20:07:27,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:07:27,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:07:27,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:07:27,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:07:27,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:27" (1/1) ... [2021-10-15 20:07:27,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:07:27,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:27,586 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:07:27,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:07:27,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:07:27,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:07:27,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:07:27,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:07:28,918 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:07:28,919 INFO L299 CfgBuilder]: Removed 192 assume(true) statements. [2021-10-15 20:07:28,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:07:28 BoogieIcfgContainer [2021-10-15 20:07:28,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:07:28,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:07:28,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:07:28,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:07:28,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:07:26" (1/3) ... [2021-10-15 20:07:28,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f2ac56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:07:28, skipping insertion in model container [2021-10-15 20:07:28,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:27" (2/3) ... [2021-10-15 20:07:28,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f2ac56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:07:28, skipping insertion in model container [2021-10-15 20:07:28,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:07:28" (3/3) ... [2021-10-15 20:07:28,936 INFO L111 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product57.cil.c [2021-10-15 20:07:28,943 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:07:28,944 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-15 20:07:29,007 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:07:29,013 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 20:07:29,014 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-15 20:07:29,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 135 places, 201 transitions, 402 flow [2021-10-15 20:07:29,097 INFO L129 PetriNetUnfolder]: 67/201 cut-off events. [2021-10-15 20:07:29,097 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:07:29,100 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 201 events. 67/201 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 555 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2021-10-15 20:07:29,100 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 201 transitions, 402 flow [2021-10-15 20:07:29,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 194 transitions, 388 flow [2021-10-15 20:07:29,123 INFO L129 PetriNetUnfolder]: 19/62 cut-off events. [2021-10-15 20:07:29,123 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:07:29,124 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:29,124 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:29,125 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:29,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:29,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1916587088, now seen corresponding path program 1 times [2021-10-15 20:07:29,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:29,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526956701] [2021-10-15 20:07:29,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:29,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:29,449 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 20:07:29,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:29,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526956701] [2021-10-15 20:07:29,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526956701] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:29,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:29,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:07:29,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143163943] [2021-10-15 20:07:29,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:07:29,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:29,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:07:29,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:07:29,487 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 201 [2021-10-15 20:07:29,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 194 transitions, 388 flow. Second operand has 2 states, 2 states have (on average 194.5) internal successors, (389), 2 states have internal predecessors, (389), 0 states have call successors, (0), 0 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 20:07:29,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:29,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 201 [2021-10-15 20:07:29,495 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:29,528 INFO L129 PetriNetUnfolder]: 59/189 cut-off events. [2021-10-15 20:07:29,529 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:07:29,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 189 events. 59/189 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 523 event pairs, 0 based on Foata normal form. 4/132 useless extension candidates. Maximal degree in co-relation 189. Up to 10 conditions per place. [2021-10-15 20:07:29,533 INFO L132 encePairwiseOnDemand]: 196/201 looper letters, 0 selfloop transitions, 0 changer transitions 0/189 dead transitions. [2021-10-15 20:07:29,533 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 189 transitions, 378 flow [2021-10-15 20:07:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:07:29,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:07:29,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 393 transitions. [2021-10-15 20:07:29,552 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9776119402985075 [2021-10-15 20:07:29,552 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 393 transitions. [2021-10-15 20:07:29,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 393 transitions. [2021-10-15 20:07:29,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:29,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 393 transitions. [2021-10-15 20:07:29,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 196.5) internal successors, (393), 2 states have internal predecessors, (393), 0 states have call successors, (0), 0 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 20:07:29,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 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 20:07:29,574 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 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 20:07:29,577 INFO L186 Difference]: Start difference. First operand has 131 places, 194 transitions, 388 flow. Second operand 2 states and 393 transitions. [2021-10-15 20:07:29,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 189 transitions, 378 flow [2021-10-15 20:07:29,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 189 transitions, 378 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:07:29,590 INFO L242 Difference]: Finished difference. Result has 132 places, 189 transitions, 378 flow [2021-10-15 20:07:29,592 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=378, PETRI_PLACES=132, PETRI_TRANSITIONS=189} [2021-10-15 20:07:29,594 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, 1 predicate places. [2021-10-15 20:07:29,594 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 189 transitions, 378 flow [2021-10-15 20:07:29,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 194.5) internal successors, (389), 2 states have internal predecessors, (389), 0 states have call successors, (0), 0 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 20:07:29,595 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:29,595 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:29,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:07:29,596 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:29,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:29,597 INFO L82 PathProgramCache]: Analyzing trace with hash 869830191, now seen corresponding path program 1 times [2021-10-15 20:07:29,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:29,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579453970] [2021-10-15 20:07:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:29,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:29,763 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 20:07:29,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:29,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579453970] [2021-10-15 20:07:29,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579453970] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:29,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:29,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:07:29,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415576465] [2021-10-15 20:07:29,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:07:29,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:29,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:07:29,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:07:29,771 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 201 [2021-10-15 20:07:29,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 189 transitions, 378 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 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 20:07:29,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:29,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 201 [2021-10-15 20:07:29,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:29,809 INFO L129 PetriNetUnfolder]: 24/76 cut-off events. [2021-10-15 20:07:29,812 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:07:29,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 76 events. 24/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 75 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 78. Up to 10 conditions per place. [2021-10-15 20:07:29,814 INFO L132 encePairwiseOnDemand]: 199/201 looper letters, 1 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2021-10-15 20:07:29,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 156 flow [2021-10-15 20:07:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:07:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:07:29,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 576 transitions. [2021-10-15 20:07:29,825 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9552238805970149 [2021-10-15 20:07:29,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 576 transitions. [2021-10-15 20:07:29,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 576 transitions. [2021-10-15 20:07:29,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:29,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 576 transitions. [2021-10-15 20:07:29,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 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 20:07:29,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 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 20:07:29,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 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 20:07:29,844 INFO L186 Difference]: Start difference. First operand has 132 places, 189 transitions, 378 flow. Second operand 3 states and 576 transitions. [2021-10-15 20:07:29,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 156 flow [2021-10-15 20:07:29,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 156 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:07:29,855 INFO L242 Difference]: Finished difference. Result has 56 places, 76 transitions, 154 flow [2021-10-15 20:07:29,857 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=56, PETRI_TRANSITIONS=76} [2021-10-15 20:07:29,862 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, -75 predicate places. [2021-10-15 20:07:29,863 INFO L470 AbstractCegarLoop]: Abstraction has has 56 places, 76 transitions, 154 flow [2021-10-15 20:07:29,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 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 20:07:29,864 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:29,865 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] [2021-10-15 20:07:29,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:07:29,866 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:29,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:29,867 INFO L82 PathProgramCache]: Analyzing trace with hash 105563969, now seen corresponding path program 1 times [2021-10-15 20:07:29,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:29,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647266178] [2021-10-15 20:07:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:29,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:30,057 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 20:07:30,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:30,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647266178] [2021-10-15 20:07:30,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647266178] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:30,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:30,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:07:30,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962540924] [2021-10-15 20:07:30,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:07:30,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:30,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:07:30,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:07:30,065 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 201 [2021-10-15 20:07:30,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 76 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 183.0) internal successors, (1098), 6 states have internal predecessors, (1098), 0 states have call successors, (0), 0 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 20:07:30,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:30,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 201 [2021-10-15 20:07:30,069 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:30,316 INFO L129 PetriNetUnfolder]: 23/75 cut-off events. [2021-10-15 20:07:30,317 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:07:30,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 75 events. 23/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 82. Up to 9 conditions per place. [2021-10-15 20:07:30,318 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 3 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2021-10-15 20:07:30,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 164 flow [2021-10-15 20:07:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:07:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:07:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 917 transitions. [2021-10-15 20:07:30,324 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9124378109452737 [2021-10-15 20:07:30,324 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 917 transitions. [2021-10-15 20:07:30,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 917 transitions. [2021-10-15 20:07:30,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:30,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 917 transitions. [2021-10-15 20:07:30,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 183.4) internal successors, (917), 5 states have internal predecessors, (917), 0 states have call successors, (0), 0 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 20:07:30,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 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 20:07:30,337 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 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 20:07:30,337 INFO L186 Difference]: Start difference. First operand has 56 places, 76 transitions, 154 flow. Second operand 5 states and 917 transitions. [2021-10-15 20:07:30,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 164 flow [2021-10-15 20:07:30,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 75 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:07:30,342 INFO L242 Difference]: Finished difference. Result has 59 places, 75 transitions, 157 flow [2021-10-15 20:07:30,342 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=59, PETRI_TRANSITIONS=75} [2021-10-15 20:07:30,343 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, -72 predicate places. [2021-10-15 20:07:30,343 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 75 transitions, 157 flow [2021-10-15 20:07:30,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.0) internal successors, (1098), 6 states have internal predecessors, (1098), 0 states have call successors, (0), 0 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 20:07:30,345 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:30,345 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] [2021-10-15 20:07:30,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:07:30,346 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:30,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:30,347 INFO L82 PathProgramCache]: Analyzing trace with hash -72226312, now seen corresponding path program 1 times [2021-10-15 20:07:30,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:30,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138347403] [2021-10-15 20:07:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:30,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:30,466 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 20:07:30,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:30,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138347403] [2021-10-15 20:07:30,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138347403] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:30,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:30,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:07:30,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574984669] [2021-10-15 20:07:30,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:07:30,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:30,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:07:30,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:07:30,471 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 201 [2021-10-15 20:07:30,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 75 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 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 20:07:30,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:30,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 201 [2021-10-15 20:07:30,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:30,541 INFO L129 PetriNetUnfolder]: 29/102 cut-off events. [2021-10-15 20:07:30,542 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:07:30,543 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 102 events. 29/102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 121. Up to 9 conditions per place. [2021-10-15 20:07:30,545 INFO L132 encePairwiseOnDemand]: 191/201 looper letters, 8 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2021-10-15 20:07:30,545 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 77 transitions, 191 flow [2021-10-15 20:07:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:07:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:07:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2021-10-15 20:07:30,550 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8109452736318408 [2021-10-15 20:07:30,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2021-10-15 20:07:30,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2021-10-15 20:07:30,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:30,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2021-10-15 20:07:30,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 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 20:07:30,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 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 20:07:30,558 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 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 20:07:30,560 INFO L186 Difference]: Start difference. First operand has 59 places, 75 transitions, 157 flow. Second operand 3 states and 489 transitions. [2021-10-15 20:07:30,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 77 transitions, 191 flow [2021-10-15 20:07:30,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 77 transitions, 186 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 20:07:30,570 INFO L242 Difference]: Finished difference. Result has 60 places, 76 transitions, 190 flow [2021-10-15 20:07:30,571 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=60, PETRI_TRANSITIONS=76} [2021-10-15 20:07:30,571 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, -71 predicate places. [2021-10-15 20:07:30,571 INFO L470 AbstractCegarLoop]: Abstraction has has 60 places, 76 transitions, 190 flow [2021-10-15 20:07:30,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 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 20:07:30,573 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:30,573 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] [2021-10-15 20:07:30,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:07:30,574 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:30,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:30,575 INFO L82 PathProgramCache]: Analyzing trace with hash 873357802, now seen corresponding path program 1 times [2021-10-15 20:07:30,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:30,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293545601] [2021-10-15 20:07:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:30,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:30,704 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 20:07:30,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:30,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293545601] [2021-10-15 20:07:30,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293545601] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:30,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:30,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:07:30,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206211472] [2021-10-15 20:07:30,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:07:30,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:30,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:07:30,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:07:30,719 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 201 [2021-10-15 20:07:30,723 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 76 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 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 20:07:30,723 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:30,724 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 201 [2021-10-15 20:07:30,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:30,788 INFO L129 PetriNetUnfolder]: 45/169 cut-off events. [2021-10-15 20:07:30,789 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-10-15 20:07:30,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 169 events. 45/169 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 298 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 216. Up to 17 conditions per place. [2021-10-15 20:07:30,791 INFO L132 encePairwiseOnDemand]: 195/201 looper letters, 12 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2021-10-15 20:07:30,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 80 transitions, 228 flow [2021-10-15 20:07:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:07:30,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:07:30,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2021-10-15 20:07:30,796 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8606965174129353 [2021-10-15 20:07:30,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2021-10-15 20:07:30,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2021-10-15 20:07:30,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:30,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2021-10-15 20:07:30,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:30,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 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 20:07:30,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 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 20:07:30,804 INFO L186 Difference]: Start difference. First operand has 60 places, 76 transitions, 190 flow. Second operand 3 states and 519 transitions. [2021-10-15 20:07:30,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 80 transitions, 228 flow [2021-10-15 20:07:30,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:07:30,808 INFO L242 Difference]: Finished difference. Result has 61 places, 78 transitions, 199 flow [2021-10-15 20:07:30,808 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=61, PETRI_TRANSITIONS=78} [2021-10-15 20:07:30,809 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, -70 predicate places. [2021-10-15 20:07:30,809 INFO L470 AbstractCegarLoop]: Abstraction has has 61 places, 78 transitions, 199 flow [2021-10-15 20:07:30,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 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 20:07:30,810 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:30,810 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] [2021-10-15 20:07:30,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:07:30,811 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:30,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:30,812 INFO L82 PathProgramCache]: Analyzing trace with hash 615192364, now seen corresponding path program 1 times [2021-10-15 20:07:30,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:30,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910035951] [2021-10-15 20:07:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:30,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:30,913 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 20:07:30,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:30,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910035951] [2021-10-15 20:07:30,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910035951] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:30,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:30,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:07:30,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902332362] [2021-10-15 20:07:30,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:07:30,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:30,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:07:30,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:07:30,920 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 201 [2021-10-15 20:07:30,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 78 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 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 20:07:30,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:30,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 201 [2021-10-15 20:07:30,923 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:31,066 INFO L129 PetriNetUnfolder]: 73/261 cut-off events. [2021-10-15 20:07:31,066 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-10-15 20:07:31,067 INFO L84 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 261 events. 73/261 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 637 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 354. Up to 23 conditions per place. [2021-10-15 20:07:31,071 INFO L132 encePairwiseOnDemand]: 195/201 looper letters, 23 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2021-10-15 20:07:31,071 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 93 transitions, 302 flow [2021-10-15 20:07:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:07:31,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:07:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 980 transitions. [2021-10-15 20:07:31,077 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8126036484245439 [2021-10-15 20:07:31,077 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 980 transitions. [2021-10-15 20:07:31,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 980 transitions. [2021-10-15 20:07:31,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:31,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 980 transitions. [2021-10-15 20:07:31,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.33333333333334) internal successors, (980), 6 states have internal predecessors, (980), 0 states have call successors, (0), 0 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 20:07:31,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 201.0) internal successors, (1407), 7 states have internal predecessors, (1407), 0 states have call successors, (0), 0 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 20:07:31,090 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 201.0) internal successors, (1407), 7 states have internal predecessors, (1407), 0 states have call successors, (0), 0 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 20:07:31,091 INFO L186 Difference]: Start difference. First operand has 61 places, 78 transitions, 199 flow. Second operand 6 states and 980 transitions. [2021-10-15 20:07:31,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 93 transitions, 302 flow [2021-10-15 20:07:31,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 93 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:07:31,097 INFO L242 Difference]: Finished difference. Result has 67 places, 83 transitions, 237 flow [2021-10-15 20:07:31,097 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=237, PETRI_PLACES=67, PETRI_TRANSITIONS=83} [2021-10-15 20:07:31,098 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, -64 predicate places. [2021-10-15 20:07:31,098 INFO L470 AbstractCegarLoop]: Abstraction has has 67 places, 83 transitions, 237 flow [2021-10-15 20:07:31,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 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 20:07:31,099 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:31,100 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] [2021-10-15 20:07:31,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 20:07:31,100 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:31,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1392623830, now seen corresponding path program 1 times [2021-10-15 20:07:31,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:31,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853356576] [2021-10-15 20:07:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:31,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:31,171 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 20:07:31,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:31,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853356576] [2021-10-15 20:07:31,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853356576] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:31,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:31,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:07:31,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018874186] [2021-10-15 20:07:31,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:07:31,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:31,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:07:31,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:07:31,177 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 201 [2021-10-15 20:07:31,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 83 transitions, 237 flow. Second operand has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 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 20:07:31,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:31,179 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 201 [2021-10-15 20:07:31,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:31,338 INFO L129 PetriNetUnfolder]: 97/364 cut-off events. [2021-10-15 20:07:31,339 INFO L130 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2021-10-15 20:07:31,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 364 events. 97/364 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1139 event pairs, 0 based on Foata normal form. 2/288 useless extension candidates. Maximal degree in co-relation 497. Up to 34 conditions per place. [2021-10-15 20:07:31,343 INFO L132 encePairwiseOnDemand]: 193/201 looper letters, 15 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2021-10-15 20:07:31,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 89 transitions, 305 flow [2021-10-15 20:07:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:07:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:07:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 690 transitions. [2021-10-15 20:07:31,347 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8582089552238806 [2021-10-15 20:07:31,347 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 690 transitions. [2021-10-15 20:07:31,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 690 transitions. [2021-10-15 20:07:31,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:31,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 690 transitions. [2021-10-15 20:07:31,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 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 20:07:31,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 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 20:07:31,356 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 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 20:07:31,356 INFO L186 Difference]: Start difference. First operand has 67 places, 83 transitions, 237 flow. Second operand 4 states and 690 transitions. [2021-10-15 20:07:31,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 89 transitions, 305 flow [2021-10-15 20:07:31,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 89 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:07:31,362 INFO L242 Difference]: Finished difference. Result has 71 places, 86 transitions, 285 flow [2021-10-15 20:07:31,362 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=71, PETRI_TRANSITIONS=86} [2021-10-15 20:07:31,363 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, -60 predicate places. [2021-10-15 20:07:31,363 INFO L470 AbstractCegarLoop]: Abstraction has has 71 places, 86 transitions, 285 flow [2021-10-15 20:07:31,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 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 20:07:31,364 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:31,364 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] [2021-10-15 20:07:31,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 20:07:31,365 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:31,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1134458392, now seen corresponding path program 1 times [2021-10-15 20:07:31,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:31,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557440112] [2021-10-15 20:07:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:31,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:31,425 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 20:07:31,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:31,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557440112] [2021-10-15 20:07:31,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557440112] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:31,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:31,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:07:31,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55071756] [2021-10-15 20:07:31,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:07:31,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:31,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:07:31,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:07:31,431 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 201 [2021-10-15 20:07:31,432 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 86 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:31,432 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:31,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 201 [2021-10-15 20:07:31,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:31,538 INFO L129 PetriNetUnfolder]: 187/691 cut-off events. [2021-10-15 20:07:31,538 INFO L130 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2021-10-15 20:07:31,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 691 events. 187/691 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3118 event pairs, 0 based on Foata normal form. 0/541 useless extension candidates. Maximal degree in co-relation 987. Up to 63 conditions per place. [2021-10-15 20:07:31,545 INFO L132 encePairwiseOnDemand]: 191/201 looper letters, 10 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2021-10-15 20:07:31,545 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 94 transitions, 347 flow [2021-10-15 20:07:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:07:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:07:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 812 transitions. [2021-10-15 20:07:31,550 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8079601990049752 [2021-10-15 20:07:31,550 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 812 transitions. [2021-10-15 20:07:31,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 812 transitions. [2021-10-15 20:07:31,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:31,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 812 transitions. [2021-10-15 20:07:31,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 162.4) internal successors, (812), 5 states have internal predecessors, (812), 0 states have call successors, (0), 0 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 20:07:31,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 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 20:07:31,560 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 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 20:07:31,560 INFO L186 Difference]: Start difference. First operand has 71 places, 86 transitions, 285 flow. Second operand 5 states and 812 transitions. [2021-10-15 20:07:31,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 94 transitions, 347 flow [2021-10-15 20:07:31,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 94 transitions, 343 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:07:31,566 INFO L242 Difference]: Finished difference. Result has 77 places, 94 transitions, 357 flow [2021-10-15 20:07:31,567 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=77, PETRI_TRANSITIONS=94} [2021-10-15 20:07:31,567 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, -54 predicate places. [2021-10-15 20:07:31,568 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 94 transitions, 357 flow [2021-10-15 20:07:31,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:31,569 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:31,569 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] [2021-10-15 20:07:31,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 20:07:31,569 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:31,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:31,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1527485402, now seen corresponding path program 1 times [2021-10-15 20:07:31,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:31,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701790624] [2021-10-15 20:07:31,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:31,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:31,678 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 20:07:31,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:31,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701790624] [2021-10-15 20:07:31,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701790624] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:31,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:31,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 20:07:31,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068870915] [2021-10-15 20:07:31,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:07:31,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:31,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:07:31,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:07:31,685 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 201 [2021-10-15 20:07:31,687 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 94 transitions, 357 flow. Second operand has 7 states, 7 states have (on average 142.42857142857142) internal successors, (997), 7 states have internal predecessors, (997), 0 states have call successors, (0), 0 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 20:07:31,687 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:31,687 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 201 [2021-10-15 20:07:31,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:31,961 INFO L129 PetriNetUnfolder]: 261/970 cut-off events. [2021-10-15 20:07:31,961 INFO L130 PetriNetUnfolder]: For 178/178 co-relation queries the response was YES. [2021-10-15 20:07:31,965 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1522 conditions, 970 events. 261/970 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4756 event pairs, 0 based on Foata normal form. 0/768 useless extension candidates. Maximal degree in co-relation 1509. Up to 102 conditions per place. [2021-10-15 20:07:31,971 INFO L132 encePairwiseOnDemand]: 185/201 looper letters, 20 selfloop transitions, 22 changer transitions 0/109 dead transitions. [2021-10-15 20:07:31,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 109 transitions, 483 flow [2021-10-15 20:07:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:07:31,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:07:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1164 transitions. [2021-10-15 20:07:31,978 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7238805970149254 [2021-10-15 20:07:31,978 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1164 transitions. [2021-10-15 20:07:31,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1164 transitions. [2021-10-15 20:07:31,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:31,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1164 transitions. [2021-10-15 20:07:31,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 20:07:31,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 201.0) internal successors, (1809), 9 states have internal predecessors, (1809), 0 states have call successors, (0), 0 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 20:07:31,991 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 201.0) internal successors, (1809), 9 states have internal predecessors, (1809), 0 states have call successors, (0), 0 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 20:07:31,991 INFO L186 Difference]: Start difference. First operand has 77 places, 94 transitions, 357 flow. Second operand 8 states and 1164 transitions. [2021-10-15 20:07:31,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 109 transitions, 483 flow [2021-10-15 20:07:31,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 109 transitions, 483 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:07:32,000 INFO L242 Difference]: Finished difference. Result has 89 places, 106 transitions, 502 flow [2021-10-15 20:07:32,000 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=502, PETRI_PLACES=89, PETRI_TRANSITIONS=106} [2021-10-15 20:07:32,000 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, -42 predicate places. [2021-10-15 20:07:32,001 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 502 flow [2021-10-15 20:07:32,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 142.42857142857142) internal successors, (997), 7 states have internal predecessors, (997), 0 states have call successors, (0), 0 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 20:07:32,002 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:32,002 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:32,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 20:07:32,003 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:32,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:32,004 INFO L82 PathProgramCache]: Analyzing trace with hash -987336539, now seen corresponding path program 1 times [2021-10-15 20:07:32,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:32,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18229112] [2021-10-15 20:07:32,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:32,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:32,084 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 20:07:32,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:32,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18229112] [2021-10-15 20:07:32,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18229112] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:32,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:32,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:07:32,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778347584] [2021-10-15 20:07:32,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:07:32,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:32,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:07:32,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:07:32,090 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 201 [2021-10-15 20:07:32,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 502 flow. Second operand has 6 states, 6 states have (on average 161.83333333333334) internal successors, (971), 6 states have internal predecessors, (971), 0 states have call successors, (0), 0 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 20:07:32,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:32,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 201 [2021-10-15 20:07:32,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:32,767 INFO L129 PetriNetUnfolder]: 900/3545 cut-off events. [2021-10-15 20:07:32,768 INFO L130 PetriNetUnfolder]: For 1356/1356 co-relation queries the response was YES. [2021-10-15 20:07:32,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6391 conditions, 3545 events. 900/3545 cut-off events. For 1356/1356 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 28502 event pairs, 43 based on Foata normal form. 16/2876 useless extension candidates. Maximal degree in co-relation 6372. Up to 432 conditions per place. [2021-10-15 20:07:32,808 INFO L132 encePairwiseOnDemand]: 188/201 looper letters, 13 selfloop transitions, 31 changer transitions 0/135 dead transitions. [2021-10-15 20:07:32,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 135 transitions, 700 flow [2021-10-15 20:07:32,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:07:32,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:07:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1488 transitions. [2021-10-15 20:07:32,816 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8225538971807629 [2021-10-15 20:07:32,816 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1488 transitions. [2021-10-15 20:07:32,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1488 transitions. [2021-10-15 20:07:32,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:32,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1488 transitions. [2021-10-15 20:07:32,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 165.33333333333334) internal successors, (1488), 9 states have internal predecessors, (1488), 0 states have call successors, (0), 0 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 20:07:32,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 201.0) internal successors, (2010), 10 states have internal predecessors, (2010), 0 states have call successors, (0), 0 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 20:07:32,833 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 201.0) internal successors, (2010), 10 states have internal predecessors, (2010), 0 states have call successors, (0), 0 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 20:07:32,833 INFO L186 Difference]: Start difference. First operand has 89 places, 106 transitions, 502 flow. Second operand 9 states and 1488 transitions. [2021-10-15 20:07:32,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 135 transitions, 700 flow [2021-10-15 20:07:32,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 135 transitions, 697 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:07:32,850 INFO L242 Difference]: Finished difference. Result has 101 places, 133 transitions, 741 flow [2021-10-15 20:07:32,851 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=741, PETRI_PLACES=101, PETRI_TRANSITIONS=133} [2021-10-15 20:07:32,852 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, -30 predicate places. [2021-10-15 20:07:32,852 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 133 transitions, 741 flow [2021-10-15 20:07:32,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.83333333333334) internal successors, (971), 6 states have internal predecessors, (971), 0 states have call successors, (0), 0 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 20:07:32,853 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:32,853 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:32,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 20:07:32,854 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:32,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:32,855 INFO L82 PathProgramCache]: Analyzing trace with hash 787670823, now seen corresponding path program 1 times [2021-10-15 20:07:32,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:32,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392243422] [2021-10-15 20:07:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:32,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:32,930 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 20:07:32,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:32,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392243422] [2021-10-15 20:07:32,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392243422] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:32,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:32,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:07:32,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998817023] [2021-10-15 20:07:32,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:07:32,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:32,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:07:32,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:07:32,936 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 201 [2021-10-15 20:07:32,938 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 133 transitions, 741 flow. Second operand has 5 states, 5 states have (on average 159.2) internal successors, (796), 5 states have internal predecessors, (796), 0 states have call successors, (0), 0 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 20:07:32,938 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:32,938 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 201 [2021-10-15 20:07:32,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:33,779 INFO L129 PetriNetUnfolder]: 936/3789 cut-off events. [2021-10-15 20:07:33,779 INFO L130 PetriNetUnfolder]: For 2844/2844 co-relation queries the response was YES. [2021-10-15 20:07:33,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7988 conditions, 3789 events. 936/3789 cut-off events. For 2844/2844 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 31052 event pairs, 44 based on Foata normal form. 3/3167 useless extension candidates. Maximal degree in co-relation 7964. Up to 449 conditions per place. [2021-10-15 20:07:33,826 INFO L132 encePairwiseOnDemand]: 194/201 looper letters, 26 selfloop transitions, 13 changer transitions 0/148 dead transitions. [2021-10-15 20:07:33,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 148 transitions, 909 flow [2021-10-15 20:07:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:07:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:07:33,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 978 transitions. [2021-10-15 20:07:33,831 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8109452736318408 [2021-10-15 20:07:33,831 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 978 transitions. [2021-10-15 20:07:33,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 978 transitions. [2021-10-15 20:07:33,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:33,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 978 transitions. [2021-10-15 20:07:33,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 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 20:07:33,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 201.0) internal successors, (1407), 7 states have internal predecessors, (1407), 0 states have call successors, (0), 0 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 20:07:33,842 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 201.0) internal successors, (1407), 7 states have internal predecessors, (1407), 0 states have call successors, (0), 0 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 20:07:33,842 INFO L186 Difference]: Start difference. First operand has 101 places, 133 transitions, 741 flow. Second operand 6 states and 978 transitions. [2021-10-15 20:07:33,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 148 transitions, 909 flow [2021-10-15 20:07:33,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 909 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:07:33,872 INFO L242 Difference]: Finished difference. Result has 110 places, 143 transitions, 869 flow [2021-10-15 20:07:33,873 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=869, PETRI_PLACES=110, PETRI_TRANSITIONS=143} [2021-10-15 20:07:33,873 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, -21 predicate places. [2021-10-15 20:07:33,874 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 143 transitions, 869 flow [2021-10-15 20:07:33,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.2) internal successors, (796), 5 states have internal predecessors, (796), 0 states have call successors, (0), 0 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 20:07:33,875 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:33,875 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:07:33,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 20:07:33,876 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:33,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:33,876 INFO L82 PathProgramCache]: Analyzing trace with hash -844136666, now seen corresponding path program 1 times [2021-10-15 20:07:33,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:33,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483691886] [2021-10-15 20:07:33,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:33,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 20:07:33,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:33,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483691886] [2021-10-15 20:07:33,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483691886] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:33,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:33,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:07:33,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529497829] [2021-10-15 20:07:33,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:07:33,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:33,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:07:33,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:07:33,961 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 201 [2021-10-15 20:07:33,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 143 transitions, 869 flow. Second operand has 6 states, 6 states have (on average 154.33333333333334) internal successors, (926), 6 states have internal predecessors, (926), 0 states have call successors, (0), 0 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 20:07:33,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:33,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 201 [2021-10-15 20:07:33,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:34,539 INFO L129 PetriNetUnfolder]: 618/2592 cut-off events. [2021-10-15 20:07:34,540 INFO L130 PetriNetUnfolder]: For 2424/2424 co-relation queries the response was YES. [2021-10-15 20:07:34,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5622 conditions, 2592 events. 618/2592 cut-off events. For 2424/2424 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 19149 event pairs, 32 based on Foata normal form. 34/2210 useless extension candidates. Maximal degree in co-relation 5594. Up to 294 conditions per place. [2021-10-15 20:07:34,568 INFO L132 encePairwiseOnDemand]: 191/201 looper letters, 17 selfloop transitions, 8 changer transitions 0/140 dead transitions. [2021-10-15 20:07:34,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 140 transitions, 885 flow [2021-10-15 20:07:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:07:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:07:34,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 940 transitions. [2021-10-15 20:07:34,574 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7794361525704809 [2021-10-15 20:07:34,574 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 940 transitions. [2021-10-15 20:07:34,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 940 transitions. [2021-10-15 20:07:34,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:34,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 940 transitions. [2021-10-15 20:07:34,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.66666666666666) internal successors, (940), 6 states have internal predecessors, (940), 0 states have call successors, (0), 0 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 20:07:34,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 201.0) internal successors, (1407), 7 states have internal predecessors, (1407), 0 states have call successors, (0), 0 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 20:07:34,584 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 201.0) internal successors, (1407), 7 states have internal predecessors, (1407), 0 states have call successors, (0), 0 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 20:07:34,585 INFO L186 Difference]: Start difference. First operand has 110 places, 143 transitions, 869 flow. Second operand 6 states and 940 transitions. [2021-10-15 20:07:34,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 140 transitions, 885 flow [2021-10-15 20:07:34,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 140 transitions, 873 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-10-15 20:07:34,616 INFO L242 Difference]: Finished difference. Result has 114 places, 140 transitions, 845 flow [2021-10-15 20:07:34,617 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=845, PETRI_PLACES=114, PETRI_TRANSITIONS=140} [2021-10-15 20:07:34,617 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, -17 predicate places. [2021-10-15 20:07:34,617 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 140 transitions, 845 flow [2021-10-15 20:07:34,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 154.33333333333334) internal successors, (926), 6 states have internal predecessors, (926), 0 states have call successors, (0), 0 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 20:07:34,618 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:34,619 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:07:34,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 20:07:34,619 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:34,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:34,620 INFO L82 PathProgramCache]: Analyzing trace with hash -771750108, now seen corresponding path program 1 times [2021-10-15 20:07:34,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:34,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395573191] [2021-10-15 20:07:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:34,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 20:07:34,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:34,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395573191] [2021-10-15 20:07:34,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395573191] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:34,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:34,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:07:34,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925910567] [2021-10-15 20:07:34,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:07:34,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:34,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:07:34,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:07:34,741 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 201 [2021-10-15 20:07:34,742 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 140 transitions, 845 flow. Second operand has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 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 20:07:34,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:34,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 201 [2021-10-15 20:07:34,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:35,045 INFO L129 PetriNetUnfolder]: 277/1302 cut-off events. [2021-10-15 20:07:35,045 INFO L130 PetriNetUnfolder]: For 1431/1431 co-relation queries the response was YES. [2021-10-15 20:07:35,052 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3049 conditions, 1302 events. 277/1302 cut-off events. For 1431/1431 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7721 event pairs, 18 based on Foata normal form. 20/1127 useless extension candidates. Maximal degree in co-relation 3019. Up to 173 conditions per place. [2021-10-15 20:07:35,060 INFO L132 encePairwiseOnDemand]: 191/201 looper letters, 27 selfloop transitions, 8 changer transitions 0/124 dead transitions. [2021-10-15 20:07:35,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 124 transitions, 774 flow [2021-10-15 20:07:35,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:07:35,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:07:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 754 transitions. [2021-10-15 20:07:35,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7502487562189055 [2021-10-15 20:07:35,065 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 754 transitions. [2021-10-15 20:07:35,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 754 transitions. [2021-10-15 20:07:35,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:35,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 754 transitions. [2021-10-15 20:07:35,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.8) internal successors, (754), 5 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:35,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 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 20:07:35,074 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 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 20:07:35,074 INFO L186 Difference]: Start difference. First operand has 114 places, 140 transitions, 845 flow. Second operand 5 states and 754 transitions. [2021-10-15 20:07:35,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 124 transitions, 774 flow [2021-10-15 20:07:35,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 124 transitions, 716 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-10-15 20:07:35,092 INFO L242 Difference]: Finished difference. Result has 110 places, 124 transitions, 667 flow [2021-10-15 20:07:35,093 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=667, PETRI_PLACES=110, PETRI_TRANSITIONS=124} [2021-10-15 20:07:35,093 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, -21 predicate places. [2021-10-15 20:07:35,093 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 124 transitions, 667 flow [2021-10-15 20:07:35,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 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 20:07:35,094 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:35,095 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:07:35,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 20:07:35,095 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:35,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1409435414, now seen corresponding path program 1 times [2021-10-15 20:07:35,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:35,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854928493] [2021-10-15 20:07:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:35,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 20:07:35,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:35,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854928493] [2021-10-15 20:07:35,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854928493] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:35,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:35,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:07:35,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691098521] [2021-10-15 20:07:35,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:07:35,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:35,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:07:35,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:07:35,205 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 201 [2021-10-15 20:07:35,207 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 124 transitions, 667 flow. Second operand has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 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 20:07:35,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:35,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 201 [2021-10-15 20:07:35,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:35,642 INFO L129 PetriNetUnfolder]: 557/2596 cut-off events. [2021-10-15 20:07:35,642 INFO L130 PetriNetUnfolder]: For 1468/1468 co-relation queries the response was YES. [2021-10-15 20:07:35,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5465 conditions, 2596 events. 557/2596 cut-off events. For 1468/1468 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 19933 event pairs, 34 based on Foata normal form. 8/2203 useless extension candidates. Maximal degree in co-relation 5437. Up to 288 conditions per place. [2021-10-15 20:07:35,671 INFO L132 encePairwiseOnDemand]: 194/201 looper letters, 9 selfloop transitions, 8 changer transitions 0/132 dead transitions. [2021-10-15 20:07:35,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 132 transitions, 725 flow [2021-10-15 20:07:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:07:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:07:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1036 transitions. [2021-10-15 20:07:35,676 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8590381426202321 [2021-10-15 20:07:35,677 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1036 transitions. [2021-10-15 20:07:35,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1036 transitions. [2021-10-15 20:07:35,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:35,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1036 transitions. [2021-10-15 20:07:35,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.66666666666666) internal successors, (1036), 6 states have internal predecessors, (1036), 0 states have call successors, (0), 0 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 20:07:35,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 201.0) internal successors, (1407), 7 states have internal predecessors, (1407), 0 states have call successors, (0), 0 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 20:07:35,698 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 201.0) internal successors, (1407), 7 states have internal predecessors, (1407), 0 states have call successors, (0), 0 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 20:07:35,707 INFO L186 Difference]: Start difference. First operand has 110 places, 124 transitions, 667 flow. Second operand 6 states and 1036 transitions. [2021-10-15 20:07:35,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 132 transitions, 725 flow [2021-10-15 20:07:35,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 132 transitions, 697 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-10-15 20:07:35,769 INFO L242 Difference]: Finished difference. Result has 116 places, 131 transitions, 709 flow [2021-10-15 20:07:35,770 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=709, PETRI_PLACES=116, PETRI_TRANSITIONS=131} [2021-10-15 20:07:35,770 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, -15 predicate places. [2021-10-15 20:07:35,770 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 131 transitions, 709 flow [2021-10-15 20:07:35,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 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 20:07:35,772 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:35,772 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:07:35,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 20:07:35,772 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:35,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:35,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1802462424, now seen corresponding path program 1 times [2021-10-15 20:07:35,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:35,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318093368] [2021-10-15 20:07:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:35,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 20:07:35,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:35,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318093368] [2021-10-15 20:07:35,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318093368] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:35,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:35,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:07:35,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426327107] [2021-10-15 20:07:35,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:07:35,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:35,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:07:35,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:07:35,860 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 201 [2021-10-15 20:07:35,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 131 transitions, 709 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 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 20:07:35,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:35,862 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 201 [2021-10-15 20:07:35,862 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:37,197 INFO L129 PetriNetUnfolder]: 1451/6396 cut-off events. [2021-10-15 20:07:37,198 INFO L130 PetriNetUnfolder]: For 5507/5507 co-relation queries the response was YES. [2021-10-15 20:07:37,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14637 conditions, 6396 events. 1451/6396 cut-off events. For 5507/5507 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 54916 event pairs, 98 based on Foata normal form. 0/5443 useless extension candidates. Maximal degree in co-relation 14607. Up to 744 conditions per place. [2021-10-15 20:07:37,290 INFO L132 encePairwiseOnDemand]: 189/201 looper letters, 58 selfloop transitions, 40 changer transitions 0/197 dead transitions. [2021-10-15 20:07:37,290 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 197 transitions, 1307 flow [2021-10-15 20:07:37,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:07:37,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:07:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1363 transitions. [2021-10-15 20:07:37,297 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7534549474847982 [2021-10-15 20:07:37,298 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1363 transitions. [2021-10-15 20:07:37,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1363 transitions. [2021-10-15 20:07:37,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:37,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1363 transitions. [2021-10-15 20:07:37,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.44444444444446) internal successors, (1363), 9 states have internal predecessors, (1363), 0 states have call successors, (0), 0 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 20:07:37,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 201.0) internal successors, (2010), 10 states have internal predecessors, (2010), 0 states have call successors, (0), 0 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 20:07:37,311 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 201.0) internal successors, (2010), 10 states have internal predecessors, (2010), 0 states have call successors, (0), 0 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 20:07:37,312 INFO L186 Difference]: Start difference. First operand has 116 places, 131 transitions, 709 flow. Second operand 9 states and 1363 transitions. [2021-10-15 20:07:37,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 197 transitions, 1307 flow [2021-10-15 20:07:37,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 197 transitions, 1307 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:07:37,364 INFO L242 Difference]: Finished difference. Result has 132 places, 161 transitions, 1077 flow [2021-10-15 20:07:37,365 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1077, PETRI_PLACES=132, PETRI_TRANSITIONS=161} [2021-10-15 20:07:37,366 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, 1 predicate places. [2021-10-15 20:07:37,366 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 161 transitions, 1077 flow [2021-10-15 20:07:37,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 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 20:07:37,367 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:37,367 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:07:37,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 20:07:37,368 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:37,369 INFO L82 PathProgramCache]: Analyzing trace with hash -736449967, now seen corresponding path program 1 times [2021-10-15 20:07:37,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:37,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941817327] [2021-10-15 20:07:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:37,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 20:07:37,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:37,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941817327] [2021-10-15 20:07:37,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941817327] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:37,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:37,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 20:07:37,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588664864] [2021-10-15 20:07:37,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:07:37,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:37,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:07:37,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:07:37,547 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 201 [2021-10-15 20:07:37,548 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 161 transitions, 1077 flow. Second operand has 7 states, 7 states have (on average 166.42857142857142) internal successors, (1165), 7 states have internal predecessors, (1165), 0 states have call successors, (0), 0 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 20:07:37,549 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:37,549 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 201 [2021-10-15 20:07:37,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:38,755 INFO L129 PetriNetUnfolder]: 1250/5878 cut-off events. [2021-10-15 20:07:38,755 INFO L130 PetriNetUnfolder]: For 6612/6612 co-relation queries the response was YES. [2021-10-15 20:07:38,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13937 conditions, 5878 events. 1250/5878 cut-off events. For 6612/6612 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 50796 event pairs, 86 based on Foata normal form. 20/5129 useless extension candidates. Maximal degree in co-relation 13899. Up to 672 conditions per place. [2021-10-15 20:07:38,827 INFO L132 encePairwiseOnDemand]: 193/201 looper letters, 15 selfloop transitions, 7 changer transitions 0/161 dead transitions. [2021-10-15 20:07:38,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 161 transitions, 1116 flow [2021-10-15 20:07:38,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:07:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:07:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1173 transitions. [2021-10-15 20:07:38,833 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8336886993603412 [2021-10-15 20:07:38,833 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1173 transitions. [2021-10-15 20:07:38,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1173 transitions. [2021-10-15 20:07:38,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:38,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1173 transitions. [2021-10-15 20:07:38,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.57142857142858) internal successors, (1173), 7 states have internal predecessors, (1173), 0 states have call successors, (0), 0 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 20:07:38,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 201.0) internal successors, (1608), 8 states have internal predecessors, (1608), 0 states have call successors, (0), 0 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 20:07:38,844 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 201.0) internal successors, (1608), 8 states have internal predecessors, (1608), 0 states have call successors, (0), 0 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 20:07:38,844 INFO L186 Difference]: Start difference. First operand has 132 places, 161 transitions, 1077 flow. Second operand 7 states and 1173 transitions. [2021-10-15 20:07:38,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 161 transitions, 1116 flow [2021-10-15 20:07:38,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 161 transitions, 1092 flow, removed 11 selfloop flow, removed 2 redundant places. [2021-10-15 20:07:38,899 INFO L242 Difference]: Finished difference. Result has 137 places, 160 transitions, 1068 flow [2021-10-15 20:07:38,900 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1068, PETRI_PLACES=137, PETRI_TRANSITIONS=160} [2021-10-15 20:07:38,900 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, 6 predicate places. [2021-10-15 20:07:38,900 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 160 transitions, 1068 flow [2021-10-15 20:07:38,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.42857142857142) internal successors, (1165), 7 states have internal predecessors, (1165), 0 states have call successors, (0), 0 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 20:07:38,901 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:38,902 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:07:38,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 20:07:38,902 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:38,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1437514545, now seen corresponding path program 1 times [2021-10-15 20:07:38,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:38,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799751424] [2021-10-15 20:07:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:38,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:07:39,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:39,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799751424] [2021-10-15 20:07:39,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799751424] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:07:39,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195418429] [2021-10-15 20:07:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:39,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:39,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:39,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:07:39,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:07:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:39,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 20:07:39,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:07:39,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195418429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:07:39,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:07:39,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-10-15 20:07:39,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34852188] [2021-10-15 20:07:39,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:07:39,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:39,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:07:39,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:07:39,610 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 201 [2021-10-15 20:07:39,612 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 160 transitions, 1068 flow. Second operand has 6 states, 6 states have (on average 159.83333333333334) internal successors, (959), 6 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 20:07:39,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:39,613 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 201 [2021-10-15 20:07:39,613 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:41,765 INFO L129 PetriNetUnfolder]: 1804/8452 cut-off events. [2021-10-15 20:07:41,765 INFO L130 PetriNetUnfolder]: For 13243/13243 co-relation queries the response was YES. [2021-10-15 20:07:41,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21129 conditions, 8452 events. 1804/8452 cut-off events. For 13243/13243 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 73157 event pairs, 140 based on Foata normal form. 72/7421 useless extension candidates. Maximal degree in co-relation 21090. Up to 978 conditions per place. [2021-10-15 20:07:41,838 INFO L132 encePairwiseOnDemand]: 190/201 looper letters, 34 selfloop transitions, 40 changer transitions 0/192 dead transitions. [2021-10-15 20:07:41,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 192 transitions, 1478 flow [2021-10-15 20:07:41,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:07:41,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:07:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1473 transitions. [2021-10-15 20:07:41,846 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.814262023217247 [2021-10-15 20:07:41,846 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1473 transitions. [2021-10-15 20:07:41,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1473 transitions. [2021-10-15 20:07:41,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:41,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1473 transitions. [2021-10-15 20:07:41,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.66666666666666) internal successors, (1473), 9 states have internal predecessors, (1473), 0 states have call successors, (0), 0 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 20:07:41,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 201.0) internal successors, (2010), 10 states have internal predecessors, (2010), 0 states have call successors, (0), 0 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 20:07:41,860 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 201.0) internal successors, (2010), 10 states have internal predecessors, (2010), 0 states have call successors, (0), 0 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 20:07:41,861 INFO L186 Difference]: Start difference. First operand has 137 places, 160 transitions, 1068 flow. Second operand 9 states and 1473 transitions. [2021-10-15 20:07:41,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 192 transitions, 1478 flow [2021-10-15 20:07:42,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 192 transitions, 1458 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-10-15 20:07:42,041 INFO L242 Difference]: Finished difference. Result has 144 places, 179 transitions, 1394 flow [2021-10-15 20:07:42,041 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1394, PETRI_PLACES=144, PETRI_TRANSITIONS=179} [2021-10-15 20:07:42,042 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, 13 predicate places. [2021-10-15 20:07:42,042 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 179 transitions, 1394 flow [2021-10-15 20:07:42,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 159.83333333333334) internal successors, (959), 6 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 20:07:42,043 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:42,043 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 20:07:42,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:07:42,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-15 20:07:42,265 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:07:42,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:42,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1916895271, now seen corresponding path program 2 times [2021-10-15 20:07:42,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:42,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32604890] [2021-10-15 20:07:42,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:42,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 20:07:42,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:42,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32604890] [2021-10-15 20:07:42,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32604890] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:42,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:42,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:07:42,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709436066] [2021-10-15 20:07:42,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:07:42,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:42,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:07:42,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:07:42,466 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 201 [2021-10-15 20:07:42,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 179 transitions, 1394 flow. Second operand has 5 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 0 states have call successors, (0), 0 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 20:07:42,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:42,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 201 [2021-10-15 20:07:42,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:43,162 INFO L129 PetriNetUnfolder]: 574/2938 cut-off events. [2021-10-15 20:07:43,162 INFO L130 PetriNetUnfolder]: For 6309/6309 co-relation queries the response was YES. [2021-10-15 20:07:43,178 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7557 conditions, 2938 events. 574/2938 cut-off events. For 6309/6309 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 21875 event pairs, 46 based on Foata normal form. 28/2561 useless extension candidates. Maximal degree in co-relation 7515. Up to 360 conditions per place. [2021-10-15 20:07:43,181 INFO L132 encePairwiseOnDemand]: 193/201 looper letters, 0 selfloop transitions, 0 changer transitions 125/125 dead transitions. [2021-10-15 20:07:43,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 125 transitions, 998 flow [2021-10-15 20:07:43,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:07:43,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:07:43,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 816 transitions. [2021-10-15 20:07:43,265 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8119402985074626 [2021-10-15 20:07:43,265 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 816 transitions. [2021-10-15 20:07:43,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 816 transitions. [2021-10-15 20:07:43,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:43,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 816 transitions. [2021-10-15 20:07:43,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.2) internal successors, (816), 5 states have internal predecessors, (816), 0 states have call successors, (0), 0 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 20:07:43,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 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 20:07:43,274 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 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 20:07:43,274 INFO L186 Difference]: Start difference. First operand has 144 places, 179 transitions, 1394 flow. Second operand 5 states and 816 transitions. [2021-10-15 20:07:43,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 125 transitions, 998 flow [2021-10-15 20:07:43,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 125 transitions, 836 flow, removed 25 selfloop flow, removed 18 redundant places. [2021-10-15 20:07:43,301 INFO L242 Difference]: Finished difference. Result has 116 places, 0 transitions, 0 flow [2021-10-15 20:07:43,301 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=116, PETRI_TRANSITIONS=0} [2021-10-15 20:07:43,302 INFO L334 CegarLoopForPetriNet]: 131 programPoint places, -15 predicate places. [2021-10-15 20:07:43,302 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 0 transitions, 0 flow [2021-10-15 20:07:43,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 0 states have call successors, (0), 0 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 20:07:43,305 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:07:43,306 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:07:43,306 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:07:43,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-15 20:07:43,313 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:07:43,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:07:43 BoogieIcfgContainer [2021-10-15 20:07:43,327 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:07:43,327 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:07:43,327 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:07:43,328 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:07:43,328 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:07:28" (3/4) ... [2021-10-15 20:07:43,333 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:07:43,370 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 41 nodes and edges [2021-10-15 20:07:43,372 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-15 20:07:43,374 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-15 20:07:43,376 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-15 20:07:43,377 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-15 20:07:43,379 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:07:43,381 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:07:43,553 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:07:43,553 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:07:43,555 INFO L168 Benchmark]: Toolchain (without parser) took 16932.64 ms. Allocated memory was 90.2 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 52.8 MB in the beginning and 1.6 GB in the end (delta: -1.6 GB). Peak memory consumption was 272.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:07:43,556 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory is still 69.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:07:43,557 INFO L168 Benchmark]: CACSL2BoogieTranslator took 698.04 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 52.5 MB in the beginning and 97.2 MB in the end (delta: -44.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:07:43,558 INFO L168 Benchmark]: Boogie Procedure Inliner took 115.75 ms. Allocated memory is still 132.1 MB. Free memory was 97.2 MB in the beginning and 93.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:07:43,558 INFO L168 Benchmark]: Boogie Preprocessor took 103.53 ms. Allocated memory is still 132.1 MB. Free memory was 93.0 MB in the beginning and 90.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:07:43,559 INFO L168 Benchmark]: RCFGBuilder took 1378.74 ms. Allocated memory is still 132.1 MB. Free memory was 90.5 MB in the beginning and 97.4 MB in the end (delta: -6.9 MB). Peak memory consumption was 44.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:07:43,560 INFO L168 Benchmark]: TraceAbstraction took 14401.25 ms. Allocated memory was 132.1 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 97.4 MB in the beginning and 1.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 402.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:07:43,560 INFO L168 Benchmark]: Witness Printer took 225.87 ms. Allocated memory is still 1.9 GB. Free memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:07:43,563 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory is still 69.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 698.04 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 52.5 MB in the beginning and 97.2 MB in the end (delta: -44.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 115.75 ms. Allocated memory is still 132.1 MB. Free memory was 97.2 MB in the beginning and 93.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 103.53 ms. Allocated memory is still 132.1 MB. Free memory was 93.0 MB in the beginning and 90.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1378.74 ms. Allocated memory is still 132.1 MB. Free memory was 90.5 MB in the beginning and 97.4 MB in the end (delta: -6.9 MB). Peak memory consumption was 44.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14401.25 ms. Allocated memory was 132.1 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 97.4 MB in the beginning and 1.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 402.5 MB. Max. memory is 16.1 GB. * Witness Printer took 225.87 ms. Allocated memory is still 1.9 GB. Free memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 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: 979]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 979]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 979]: 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, 135 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 11.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14310.6ms, OverallIterations: 18, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 10943.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 97.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 164 SDtfs, 365 SDslu, 247 SDs, 0 SdLazy, 478 SolverSat, 86 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1134.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 191 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 604.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1394occurred in iteration=17, InterpolantAutomatonStates: 101, 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: 219.2ms SsaConstructionTime, 838.3ms SatisfiabilityAnalysisTime, 1575.1ms InterpolantComputationTime, 755 NumberOfCodeBlocks, 755 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 736 ConstructedInterpolants, 0 QuantifiedInterpolants, 1253 SizeOfPredicates, 3 NumberOfNonLiveVariables, 437 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 19 InterpolantComputations, 17 PerfectInterpolantSequences, 141/147 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 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:07:43,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11237fca-e8db-45d3-aead-54c6a9d5b843/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...