./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label10.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_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/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_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/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_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/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 bd7ba16d04093e753a822e0fa558e457a069d870 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:20:45,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:20:45,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:20:45,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:20:45,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:20:45,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:20:45,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:20:45,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:20:45,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:20:45,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:20:45,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:20:45,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:20:45,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:20:45,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:20:45,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:20:45,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:20:45,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:20:45,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:20:45,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:20:45,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:20:45,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:20:45,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:20:45,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:20:45,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:20:45,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:20:45,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:20:45,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:20:45,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:20:45,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:20:45,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:20:45,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:20:45,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:20:45,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:20:45,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:20:45,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:20:45,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:20:45,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:20:45,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:20:45,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:20:45,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:20:45,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:20:45,543 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:20:45,592 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:20:45,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:20:45,593 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:20:45,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:20:45,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:20:45,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:20:45,601 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:20:45,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:20:45,602 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:20:45,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:20:45,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:20:45,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:20:45,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:20:45,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:20:45,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:20:45,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:20:45,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:20:45,606 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:20:45,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:20:45,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:20:45,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:20:45,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:20:45,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:20:45,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:20:45,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:20:45,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:20:45,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:20:45,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:20:45,608 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:20:45,610 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:20:45,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:20:45,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:20:45,611 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_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd7ba16d04093e753a822e0fa558e457a069d870 [2021-10-15 19:20:45,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:20:45,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:20:45,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:20:45,891 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:20:45,892 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:20:45,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem01_label10.c [2021-10-15 19:20:45,966 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/data/e9da9acac/2958c59b8e7342e08cc7096359344bbe/FLAGaa3db7889 [2021-10-15 19:20:46,579 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:20:46,579 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/sv-benchmarks/c/eca-rers2012/Problem01_label10.c [2021-10-15 19:20:46,602 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/data/e9da9acac/2958c59b8e7342e08cc7096359344bbe/FLAGaa3db7889 [2021-10-15 19:20:46,827 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/data/e9da9acac/2958c59b8e7342e08cc7096359344bbe [2021-10-15 19:20:46,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:20:46,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:20:46,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:20:46,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:20:46,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:20:46,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:20:46" (1/1) ... [2021-10-15 19:20:46,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29badf31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:46, skipping insertion in model container [2021-10-15 19:20:46,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:20:46" (1/1) ... [2021-10-15 19:20:46,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:20:46,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:20:47,245 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_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/sv-benchmarks/c/eca-rers2012/Problem01_label10.c[19224,19237] [2021-10-15 19:20:47,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:20:47,285 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:20:47,430 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_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/sv-benchmarks/c/eca-rers2012/Problem01_label10.c[19224,19237] [2021-10-15 19:20:47,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:20:47,456 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:20:47,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:47 WrapperNode [2021-10-15 19:20:47,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:20:47,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:20:47,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:20:47,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:20:47,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:47" (1/1) ... [2021-10-15 19:20:47,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:47" (1/1) ... [2021-10-15 19:20:47,574 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:20:47,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:20:47,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:20:47,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:20:47,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:47" (1/1) ... [2021-10-15 19:20:47,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:47" (1/1) ... [2021-10-15 19:20:47,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:47" (1/1) ... [2021-10-15 19:20:47,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:47" (1/1) ... [2021-10-15 19:20:47,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:47" (1/1) ... [2021-10-15 19:20:47,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:47" (1/1) ... [2021-10-15 19:20:47,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:47" (1/1) ... [2021-10-15 19:20:47,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:20:47,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:20:47,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:20:47,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:20:47,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:47" (1/1) ... [2021-10-15 19:20:47,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:20:47,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:47,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:20:47,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:20:47,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:20:47,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:20:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:20:47,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:20:49,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:20:49,038 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:20:49,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:20:49 BoogieIcfgContainer [2021-10-15 19:20:49,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:20:49,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:20:49,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:20:49,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:20:49,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:20:46" (1/3) ... [2021-10-15 19:20:49,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ca6a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:20:49, skipping insertion in model container [2021-10-15 19:20:49,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:47" (2/3) ... [2021-10-15 19:20:49,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ca6a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:20:49, skipping insertion in model container [2021-10-15 19:20:49,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:20:49" (3/3) ... [2021-10-15 19:20:49,052 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label10.c [2021-10-15 19:20:49,061 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:20:49,061 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:20:49,104 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:20:49,111 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:20:49,111 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:20:49,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 198 places, 327 transitions, 654 flow [2021-10-15 19:20:49,220 INFO L129 PetriNetUnfolder]: 130/327 cut-off events. [2021-10-15 19:20:49,220 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:20:49,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 327 events. 130/327 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 205 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2021-10-15 19:20:49,223 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 327 transitions, 654 flow [2021-10-15 19:20:49,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 322 transitions, 644 flow [2021-10-15 19:20:49,271 INFO L129 PetriNetUnfolder]: 106/257 cut-off events. [2021-10-15 19:20:49,272 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:20:49,272 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:20:49,275 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:49,276 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:20:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:49,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1265250489, now seen corresponding path program 1 times [2021-10-15 19:20:49,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:49,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787615613] [2021-10-15 19:20:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:49,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:49,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:49,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787615613] [2021-10-15 19:20:49,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787615613] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:49,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:49,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:20:49,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660688304] [2021-10-15 19:20:49,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:20:49,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:49,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:20:49,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:20:49,960 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:20:49,970 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 322 transitions, 644 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:49,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:20:49,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:20:49,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:20:51,167 INFO L129 PetriNetUnfolder]: 146/602 cut-off events. [2021-10-15 19:20:51,168 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:20:51,169 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1192 conditions, 602 events. 146/602 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1244 event pairs, 0 based on Foata normal form. 61/457 useless extension candidates. Maximal degree in co-relation 2. Up to 239 conditions per place. [2021-10-15 19:20:51,175 INFO L132 encePairwiseOnDemand]: 138/327 looper letters, 439 selfloop transitions, 64 changer transitions 85/594 dead transitions. [2021-10-15 19:20:51,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 594 transitions, 2364 flow [2021-10-15 19:20:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:20:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:20:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 869 transitions. [2021-10-15 19:20:51,195 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5314984709480123 [2021-10-15 19:20:51,196 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 869 transitions. [2021-10-15 19:20:51,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 869 transitions. [2021-10-15 19:20:51,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:20:51,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 869 transitions. [2021-10-15 19:20:51,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:51,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:51,221 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:51,223 INFO L186 Difference]: Start difference. First operand has 195 places, 322 transitions, 644 flow. Second operand 5 states and 869 transitions. [2021-10-15 19:20:51,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 594 transitions, 2364 flow [2021-10-15 19:20:51,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 594 transitions, 2364 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:20:51,247 INFO L242 Difference]: Finished difference. Result has 202 places, 255 transitions, 986 flow [2021-10-15 19:20:51,250 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=986, PETRI_PLACES=202, PETRI_TRANSITIONS=255} [2021-10-15 19:20:51,251 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, 7 predicate places. [2021-10-15 19:20:51,251 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 255 transitions, 986 flow [2021-10-15 19:20:51,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:51,252 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:20:51,252 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:51,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:20:51,253 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:20:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:51,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2120064666, now seen corresponding path program 1 times [2021-10-15 19:20:51,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:51,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903332831] [2021-10-15 19:20:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:51,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:51,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:51,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903332831] [2021-10-15 19:20:51,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903332831] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:51,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:51,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:20:51,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940049012] [2021-10-15 19:20:51,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:20:51,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:51,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:20:51,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:20:51,452 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:20:51,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 255 transitions, 986 flow. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:51,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:20:51,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:20:51,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:20:52,316 INFO L129 PetriNetUnfolder]: 126/748 cut-off events. [2021-10-15 19:20:52,317 INFO L130 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2021-10-15 19:20:52,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1727 conditions, 748 events. 126/748 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2201 event pairs, 0 based on Foata normal form. 109/857 useless extension candidates. Maximal degree in co-relation 762. Up to 332 conditions per place. [2021-10-15 19:20:52,323 INFO L132 encePairwiseOnDemand]: 259/327 looper letters, 325 selfloop transitions, 11 changer transitions 137/479 dead transitions. [2021-10-15 19:20:52,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 479 transitions, 2398 flow [2021-10-15 19:20:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:20:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:20:52,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 564 transitions. [2021-10-15 19:20:52,327 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43119266055045874 [2021-10-15 19:20:52,328 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 564 transitions. [2021-10-15 19:20:52,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 564 transitions. [2021-10-15 19:20:52,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:20:52,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 564 transitions. [2021-10-15 19:20:52,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:52,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:52,337 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:52,337 INFO L186 Difference]: Start difference. First operand has 202 places, 255 transitions, 986 flow. Second operand 4 states and 564 transitions. [2021-10-15 19:20:52,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 479 transitions, 2398 flow [2021-10-15 19:20:52,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 479 transitions, 2398 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:20:52,360 INFO L242 Difference]: Finished difference. Result has 146 places, 215 transitions, 921 flow [2021-10-15 19:20:52,361 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=921, PETRI_PLACES=146, PETRI_TRANSITIONS=215} [2021-10-15 19:20:52,362 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -49 predicate places. [2021-10-15 19:20:52,362 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 215 transitions, 921 flow [2021-10-15 19:20:52,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:52,363 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:20:52,363 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:52,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:20:52,364 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:20:52,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:52,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1758005848, now seen corresponding path program 1 times [2021-10-15 19:20:52,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:52,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656189835] [2021-10-15 19:20:52,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:52,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:52,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:52,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656189835] [2021-10-15 19:20:52,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656189835] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:52,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400207084] [2021-10-15 19:20:52,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:52,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:52,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:52,462 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:52,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:20:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:52,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:20:52,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:20:53,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400207084] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:53,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:20:53,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:20:53,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848116771] [2021-10-15 19:20:53,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:20:53,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:53,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:20:53,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:20:53,116 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:20:53,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 215 transitions, 921 flow. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:53,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:20:53,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:20:53,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:20:53,763 INFO L129 PetriNetUnfolder]: 156/1076 cut-off events. [2021-10-15 19:20:53,763 INFO L130 PetriNetUnfolder]: For 490/490 co-relation queries the response was YES. [2021-10-15 19:20:53,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2604 conditions, 1076 events. 156/1076 cut-off events. For 490/490 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3753 event pairs, 0 based on Foata normal form. 3/1079 useless extension candidates. Maximal degree in co-relation 1725. Up to 625 conditions per place. [2021-10-15 19:20:53,772 INFO L132 encePairwiseOnDemand]: 279/327 looper letters, 334 selfloop transitions, 77 changer transitions 0/417 dead transitions. [2021-10-15 19:20:53,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 417 transitions, 2594 flow [2021-10-15 19:20:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:20:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:20:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2021-10-15 19:20:53,775 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38328236493374107 [2021-10-15 19:20:53,776 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2021-10-15 19:20:53,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2021-10-15 19:20:53,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:20:53,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2021-10-15 19:20:53,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:53,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:53,782 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:53,783 INFO L186 Difference]: Start difference. First operand has 146 places, 215 transitions, 921 flow. Second operand 3 states and 376 transitions. [2021-10-15 19:20:53,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 417 transitions, 2594 flow [2021-10-15 19:20:53,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 417 transitions, 2402 flow, removed 87 selfloop flow, removed 2 redundant places. [2021-10-15 19:20:53,810 INFO L242 Difference]: Finished difference. Result has 147 places, 290 transitions, 1790 flow [2021-10-15 19:20:53,811 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1790, PETRI_PLACES=147, PETRI_TRANSITIONS=290} [2021-10-15 19:20:53,812 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -48 predicate places. [2021-10-15 19:20:53,812 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 290 transitions, 1790 flow [2021-10-15 19:20:53,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:53,812 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:20:53,813 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:53,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:54,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:54,041 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:20:54,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:54,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1288484661, now seen corresponding path program 1 times [2021-10-15 19:20:54,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:54,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991541785] [2021-10-15 19:20:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:54,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-15 19:20:54,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:54,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991541785] [2021-10-15 19:20:54,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991541785] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:54,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992109534] [2021-10-15 19:20:54,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:54,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:54,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:54,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:54,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:20:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:54,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:20:54,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-15 19:20:54,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992109534] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:54,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:20:54,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:20:54,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745612203] [2021-10-15 19:20:54,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:20:54,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:54,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:20:54,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:20:54,841 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:20:54,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 290 transitions, 1790 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:54,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:20:54,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:20:54,842 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:20:55,726 INFO L129 PetriNetUnfolder]: 204/1386 cut-off events. [2021-10-15 19:20:55,727 INFO L130 PetriNetUnfolder]: For 1355/1355 co-relation queries the response was YES. [2021-10-15 19:20:55,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3521 conditions, 1386 events. 204/1386 cut-off events. For 1355/1355 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5540 event pairs, 0 based on Foata normal form. 44/1430 useless extension candidates. Maximal degree in co-relation 1736. Up to 1077 conditions per place. [2021-10-15 19:20:55,738 INFO L132 encePairwiseOnDemand]: 286/327 looper letters, 421 selfloop transitions, 38 changer transitions 0/465 dead transitions. [2021-10-15 19:20:55,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 465 transitions, 3406 flow [2021-10-15 19:20:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:20:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:20:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2021-10-15 19:20:55,741 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38328236493374107 [2021-10-15 19:20:55,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2021-10-15 19:20:55,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2021-10-15 19:20:55,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:20:55,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2021-10-15 19:20:55,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:55,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:55,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:55,753 INFO L186 Difference]: Start difference. First operand has 147 places, 290 transitions, 1790 flow. Second operand 3 states and 376 transitions. [2021-10-15 19:20:55,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 465 transitions, 3406 flow [2021-10-15 19:20:55,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 465 transitions, 3110 flow, removed 47 selfloop flow, removed 2 redundant places. [2021-10-15 19:20:55,778 INFO L242 Difference]: Finished difference. Result has 149 places, 326 transitions, 2166 flow [2021-10-15 19:20:55,779 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2166, PETRI_PLACES=149, PETRI_TRANSITIONS=326} [2021-10-15 19:20:55,780 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -46 predicate places. [2021-10-15 19:20:55,780 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 326 transitions, 2166 flow [2021-10-15 19:20:55,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:55,786 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:20:55,787 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:55,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:56,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:56,001 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:20:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:56,001 INFO L82 PathProgramCache]: Analyzing trace with hash 633098161, now seen corresponding path program 1 times [2021-10-15 19:20:56,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:56,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901133282] [2021-10-15 19:20:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:56,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-15 19:20:56,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:56,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901133282] [2021-10-15 19:20:56,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901133282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:20:56,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438892669] [2021-10-15 19:20:56,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:56,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:56,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:56,109 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:20:56,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:20:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:56,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:20:56,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-15 19:20:56,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438892669] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:56,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:20:56,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:20:56,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299511595] [2021-10-15 19:20:56,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:20:56,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:56,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:20:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:20:56,668 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:20:56,668 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 326 transitions, 2166 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:56,668 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:20:56,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:20:56,669 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:20:57,499 INFO L129 PetriNetUnfolder]: 258/1702 cut-off events. [2021-10-15 19:20:57,499 INFO L130 PetriNetUnfolder]: For 1651/1651 co-relation queries the response was YES. [2021-10-15 19:20:57,502 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4371 conditions, 1702 events. 258/1702 cut-off events. For 1651/1651 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 7859 event pairs, 0 based on Foata normal form. 18/1720 useless extension candidates. Maximal degree in co-relation 2810. Up to 989 conditions per place. [2021-10-15 19:20:57,511 INFO L132 encePairwiseOnDemand]: 280/327 looper letters, 384 selfloop transitions, 117 changer transitions 0/507 dead transitions. [2021-10-15 19:20:57,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 507 transitions, 3964 flow [2021-10-15 19:20:57,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:20:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:20:57,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2021-10-15 19:20:57,514 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.382262996941896 [2021-10-15 19:20:57,514 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2021-10-15 19:20:57,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2021-10-15 19:20:57,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:20:57,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2021-10-15 19:20:57,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:57,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:57,520 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:57,521 INFO L186 Difference]: Start difference. First operand has 149 places, 326 transitions, 2166 flow. Second operand 3 states and 375 transitions. [2021-10-15 19:20:57,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 507 transitions, 3964 flow [2021-10-15 19:20:57,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 507 transitions, 3884 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:20:57,559 INFO L242 Difference]: Finished difference. Result has 151 places, 380 transitions, 3226 flow [2021-10-15 19:20:57,560 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2090, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3226, PETRI_PLACES=151, PETRI_TRANSITIONS=380} [2021-10-15 19:20:57,560 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -44 predicate places. [2021-10-15 19:20:57,561 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 380 transitions, 3226 flow [2021-10-15 19:20:57,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:57,562 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:20:57,562 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:57,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:57,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:20:57,780 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:20:57,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:57,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1234264243, now seen corresponding path program 1 times [2021-10-15 19:20:57,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:57,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506902111] [2021-10-15 19:20:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:57,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-15 19:20:57,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:57,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506902111] [2021-10-15 19:20:57,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506902111] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:57,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:57,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:20:57,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306457001] [2021-10-15 19:20:57,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:20:57,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:57,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:20:57,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:20:57,877 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:20:57,878 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 380 transitions, 3226 flow. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:57,878 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:20:57,878 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:20:57,878 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:20:58,850 INFO L129 PetriNetUnfolder]: 281/1987 cut-off events. [2021-10-15 19:20:58,850 INFO L130 PetriNetUnfolder]: For 3151/3151 co-relation queries the response was YES. [2021-10-15 19:20:58,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5287 conditions, 1987 events. 281/1987 cut-off events. For 3151/3151 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9852 event pairs, 0 based on Foata normal form. 32/2019 useless extension candidates. Maximal degree in co-relation 2777. Up to 1195 conditions per place. [2021-10-15 19:20:58,864 INFO L132 encePairwiseOnDemand]: 294/327 looper letters, 414 selfloop transitions, 110 changer transitions 0/530 dead transitions. [2021-10-15 19:20:58,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 530 transitions, 4750 flow [2021-10-15 19:20:58,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:20:58,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:20:58,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2021-10-15 19:20:58,867 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.363914373088685 [2021-10-15 19:20:58,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2021-10-15 19:20:58,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2021-10-15 19:20:58,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:20:58,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2021-10-15 19:20:58,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:58,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:58,899 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:58,900 INFO L186 Difference]: Start difference. First operand has 151 places, 380 transitions, 3226 flow. Second operand 3 states and 357 transitions. [2021-10-15 19:20:58,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 530 transitions, 4750 flow [2021-10-15 19:20:58,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 530 transitions, 4464 flow, removed 26 selfloop flow, removed 2 redundant places. [2021-10-15 19:20:58,940 INFO L242 Difference]: Finished difference. Result has 153 places, 403 transitions, 3684 flow [2021-10-15 19:20:58,941 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2940, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3684, PETRI_PLACES=153, PETRI_TRANSITIONS=403} [2021-10-15 19:20:58,941 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -42 predicate places. [2021-10-15 19:20:58,941 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 403 transitions, 3684 flow [2021-10-15 19:20:58,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:58,942 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:20:58,942 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:58,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:20:58,945 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:20:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:58,946 INFO L82 PathProgramCache]: Analyzing trace with hash 286584158, now seen corresponding path program 1 times [2021-10-15 19:20:58,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:20:58,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578231237] [2021-10-15 19:20:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:58,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:20:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-15 19:20:59,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:20:59,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578231237] [2021-10-15 19:20:59,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578231237] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:59,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:59,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:20:59,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180042005] [2021-10-15 19:20:59,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:20:59,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:20:59,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:20:59,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:20:59,079 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:20:59,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 403 transitions, 3684 flow. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:20:59,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:20:59,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:20:59,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:00,598 INFO L129 PetriNetUnfolder]: 355/2585 cut-off events. [2021-10-15 19:21:00,599 INFO L130 PetriNetUnfolder]: For 4724/4724 co-relation queries the response was YES. [2021-10-15 19:21:00,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6981 conditions, 2585 events. 355/2585 cut-off events. For 4724/4724 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 14043 event pairs, 0 based on Foata normal form. 30/2615 useless extension candidates. Maximal degree in co-relation 3821. Up to 1212 conditions per place. [2021-10-15 19:21:00,621 INFO L132 encePairwiseOnDemand]: 280/327 looper letters, 535 selfloop transitions, 184 changer transitions 0/725 dead transitions. [2021-10-15 19:21:00,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 725 transitions, 6508 flow [2021-10-15 19:21:00,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:21:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:21:00,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 546 transitions. [2021-10-15 19:21:00,624 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41743119266055045 [2021-10-15 19:21:00,624 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 546 transitions. [2021-10-15 19:21:00,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 546 transitions. [2021-10-15 19:21:00,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:00,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 546 transitions. [2021-10-15 19:21:00,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:00,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:00,665 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:00,665 INFO L186 Difference]: Start difference. First operand has 153 places, 403 transitions, 3684 flow. Second operand 4 states and 546 transitions. [2021-10-15 19:21:00,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 725 transitions, 6508 flow [2021-10-15 19:21:00,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 725 transitions, 6216 flow, removed 17 selfloop flow, removed 2 redundant places. [2021-10-15 19:21:00,706 INFO L242 Difference]: Finished difference. Result has 157 places, 471 transitions, 5134 flow [2021-10-15 19:21:00,706 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5134, PETRI_PLACES=157, PETRI_TRANSITIONS=471} [2021-10-15 19:21:00,707 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -38 predicate places. [2021-10-15 19:21:00,707 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 471 transitions, 5134 flow [2021-10-15 19:21:00,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:00,707 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:00,708 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:00,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:21:00,708 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:21:00,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:00,709 INFO L82 PathProgramCache]: Analyzing trace with hash 623014397, now seen corresponding path program 1 times [2021-10-15 19:21:00,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:00,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809699392] [2021-10-15 19:21:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:00,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 103 proven. 29 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-15 19:21:00,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:00,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809699392] [2021-10-15 19:21:00,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809699392] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:21:00,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627412816] [2021-10-15 19:21:00,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:00,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:00,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:00,845 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:00,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:21:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:01,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:21:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-15 19:21:01,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627412816] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:01,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:21:01,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:21:01,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489426132] [2021-10-15 19:21:01,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:21:01,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:01,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:21:01,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:21:01,523 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:21:01,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 471 transitions, 5134 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:01,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:01,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:21:01,524 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:02,977 INFO L129 PetriNetUnfolder]: 286/2514 cut-off events. [2021-10-15 19:21:02,978 INFO L130 PetriNetUnfolder]: For 5194/5194 co-relation queries the response was YES. [2021-10-15 19:21:02,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6726 conditions, 2514 events. 286/2514 cut-off events. For 5194/5194 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 13937 event pairs, 0 based on Foata normal form. 18/2532 useless extension candidates. Maximal degree in co-relation 4462. Up to 1499 conditions per place. [2021-10-15 19:21:02,987 INFO L132 encePairwiseOnDemand]: 281/327 looper letters, 0 selfloop transitions, 0 changer transitions 545/545 dead transitions. [2021-10-15 19:21:02,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 545 transitions, 5678 flow [2021-10-15 19:21:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:21:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:21:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 373 transitions. [2021-10-15 19:21:02,990 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38022426095820594 [2021-10-15 19:21:02,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 373 transitions. [2021-10-15 19:21:02,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 373 transitions. [2021-10-15 19:21:02,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:02,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 373 transitions. [2021-10-15 19:21:02,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:02,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:02,996 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:02,996 INFO L186 Difference]: Start difference. First operand has 157 places, 471 transitions, 5134 flow. Second operand 3 states and 373 transitions. [2021-10-15 19:21:02,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 545 transitions, 5678 flow [2021-10-15 19:21:03,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 545 transitions, 5678 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:21:03,032 INFO L242 Difference]: Finished difference. Result has 157 places, 0 transitions, 0 flow [2021-10-15 19:21:03,033 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=157, PETRI_TRANSITIONS=0} [2021-10-15 19:21:03,033 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -38 predicate places. [2021-10-15 19:21:03,038 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 0 transitions, 0 flow [2021-10-15 19:21:03,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:21:03,041 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:21:03,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:03,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:03,260 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:21:03,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:21:03 BoogieIcfgContainer [2021-10-15 19:21:03,268 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:21:03,269 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:21:03,269 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:21:03,269 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:21:03,270 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:20:49" (3/4) ... [2021-10-15 19:21:03,274 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:21:03,309 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:21:03,311 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:21:03,312 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:21:03,314 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:21:03,495 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:21:03,495 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:21:03,497 INFO L168 Benchmark]: Toolchain (without parser) took 16662.86 ms. Allocated memory was 94.4 MB in the beginning and 270.5 MB in the end (delta: 176.2 MB). Free memory was 58.8 MB in the beginning and 110.6 MB in the end (delta: -51.9 MB). Peak memory consumption was 123.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:21:03,498 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 94.4 MB. Free memory is still 47.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:21:03,498 INFO L168 Benchmark]: CACSL2BoogieTranslator took 621.64 ms. Allocated memory is still 94.4 MB. Free memory was 58.6 MB in the beginning and 53.1 MB in the end (delta: 5.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:21:03,499 INFO L168 Benchmark]: Boogie Procedure Inliner took 116.61 ms. Allocated memory is still 94.4 MB. Free memory was 53.1 MB in the beginning and 47.4 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:21:03,499 INFO L168 Benchmark]: Boogie Preprocessor took 93.68 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 47.1 MB in the beginning and 86.0 MB in the end (delta: -38.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:21:03,500 INFO L168 Benchmark]: RCFGBuilder took 1372.41 ms. Allocated memory is still 113.2 MB. Free memory was 86.0 MB in the beginning and 77.6 MB in the end (delta: 8.5 MB). Peak memory consumption was 50.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:21:03,500 INFO L168 Benchmark]: TraceAbstraction took 14224.46 ms. Allocated memory was 113.2 MB in the beginning and 270.5 MB in the end (delta: 157.3 MB). Free memory was 77.0 MB in the beginning and 124.2 MB in the end (delta: -47.2 MB). Peak memory consumption was 111.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:21:03,501 INFO L168 Benchmark]: Witness Printer took 226.42 ms. Allocated memory is still 270.5 MB. Free memory was 124.2 MB in the beginning and 110.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:21:03,504 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 94.4 MB. Free memory is still 47.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 621.64 ms. Allocated memory is still 94.4 MB. Free memory was 58.6 MB in the beginning and 53.1 MB in the end (delta: 5.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 116.61 ms. Allocated memory is still 94.4 MB. Free memory was 53.1 MB in the beginning and 47.4 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 93.68 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 47.1 MB in the beginning and 86.0 MB in the end (delta: -38.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1372.41 ms. Allocated memory is still 113.2 MB. Free memory was 86.0 MB in the beginning and 77.6 MB in the end (delta: 8.5 MB). Peak memory consumption was 50.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14224.46 ms. Allocated memory was 113.2 MB in the beginning and 270.5 MB in the end (delta: 157.3 MB). Free memory was 77.0 MB in the beginning and 124.2 MB in the end (delta: -47.2 MB). Peak memory consumption was 111.1 MB. Max. memory is 16.1 GB. * Witness Printer took 226.42 ms. Allocated memory is still 270.5 MB. Free memory was 124.2 MB in the beginning and 110.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 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: 516]: 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, 198 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 36.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14160.1ms, OverallIterations: 8, TraceHistogramMax: 5, EmptinessCheckTime: 0.0ms, AutomataDifference: 8957.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 123.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 382 SDtfs, 1244 SDslu, 0 SDs, 0 SdLazy, 3220 SolverSat, 651 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3322.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 645 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5134occurred in iteration=7, InterpolantAutomatonStates: 28, 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: 168.1ms SsaConstructionTime, 482.0ms SatisfiabilityAnalysisTime, 2805.0ms InterpolantComputationTime, 1818 NumberOfCodeBlocks, 1818 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1806 ConstructedInterpolants, 0 QuantifiedInterpolants, 7232 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1316 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 12 InterpolantComputations, 8 PerfectInterpolantSequences, 798/836 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:21:03,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb2ff48-4564-4b5c-9258-9a0da3fb0ee6/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...