./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label49.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_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/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_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label49.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/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_3e901369-0e98-404c-9718-6b08fd0f5144/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 c7e59aea7a3c4214c2070bc3dc105ace2c6879c8 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:25:34,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:25:34,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:25:34,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:25:34,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:25:34,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:25:34,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:25:34,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:25:34,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:25:34,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:25:34,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:25:34,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:25:34,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:25:34,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:25:34,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:25:34,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:25:34,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:25:34,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:25:34,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:25:34,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:25:34,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:25:34,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:25:34,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:25:34,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:25:34,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:25:34,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:25:34,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:25:34,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:25:34,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:25:34,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:25:34,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:25:34,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:25:34,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:25:34,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:25:34,448 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:25:34,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:25:34,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:25:34,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:25:34,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:25:34,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:25:34,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:25:34,456 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:25:34,484 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:25:34,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:25:34,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:25:34,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:25:34,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:25:34,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:25:34,487 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:25:34,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:25:34,488 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:25:34,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:25:34,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:25:34,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:25:34,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:25:34,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:25:34,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:25:34,489 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:25:34,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:25:34,490 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:25:34,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:25:34,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:25:34,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:25:34,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:25:34,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:25:34,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:25:34,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:25:34,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:25:34,492 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:25:34,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:25:34,493 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:25:34,493 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:25:34,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:25:34,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:25:34,494 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_3e901369-0e98-404c-9718-6b08fd0f5144/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e59aea7a3c4214c2070bc3dc105ace2c6879c8 [2021-10-15 19:25:34,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:25:34,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:25:34,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:25:34,801 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:25:34,802 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:25:34,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem01_label49.c [2021-10-15 19:25:34,893 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/data/4703e4d91/e10c5928b1df40559c543e89757c1156/FLAG0e180321f [2021-10-15 19:25:35,625 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:25:35,626 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/sv-benchmarks/c/eca-rers2012/Problem01_label49.c [2021-10-15 19:25:35,641 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/data/4703e4d91/e10c5928b1df40559c543e89757c1156/FLAG0e180321f [2021-10-15 19:25:35,860 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/data/4703e4d91/e10c5928b1df40559c543e89757c1156 [2021-10-15 19:25:35,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:25:35,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:25:35,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:25:35,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:25:35,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:25:35,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:25:35" (1/1) ... [2021-10-15 19:25:35,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57d07b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:25:35, skipping insertion in model container [2021-10-15 19:25:35,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:25:35" (1/1) ... [2021-10-15 19:25:35,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:25:35,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:25:36,404 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_3e901369-0e98-404c-9718-6b08fd0f5144/sv-benchmarks/c/eca-rers2012/Problem01_label49.c[18854,18867] [2021-10-15 19:25:36,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:25:36,452 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:25:36,565 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_3e901369-0e98-404c-9718-6b08fd0f5144/sv-benchmarks/c/eca-rers2012/Problem01_label49.c[18854,18867] [2021-10-15 19:25:36,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:25:36,602 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:25:36,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:25:36 WrapperNode [2021-10-15 19:25:36,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:25:36,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:25:36,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:25:36,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:25:36,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:25:36" (1/1) ... [2021-10-15 19:25:36,642 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:25:36" (1/1) ... [2021-10-15 19:25:36,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:25:36,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:25:36,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:25:36,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:25:36,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:25:36" (1/1) ... [2021-10-15 19:25:36,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:25:36" (1/1) ... [2021-10-15 19:25:36,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:25:36" (1/1) ... [2021-10-15 19:25:36,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:25:36" (1/1) ... [2021-10-15 19:25:36,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:25:36" (1/1) ... [2021-10-15 19:25:36,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:25:36" (1/1) ... [2021-10-15 19:25:36,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:25:36" (1/1) ... [2021-10-15 19:25:36,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:25:36,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:25:36,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:25:36,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:25:36,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:25:36" (1/1) ... [2021-10-15 19:25:36,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:25:36,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:25:36,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:25:36,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:25:36,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:25:36,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:25:36,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:25:36,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:25:38,153 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:25:38,153 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:25:38,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:25:38 BoogieIcfgContainer [2021-10-15 19:25:38,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:25:38,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:25:38,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:25:38,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:25:38,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:25:35" (1/3) ... [2021-10-15 19:25:38,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc59fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:25:38, skipping insertion in model container [2021-10-15 19:25:38,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:25:36" (2/3) ... [2021-10-15 19:25:38,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc59fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:25:38, skipping insertion in model container [2021-10-15 19:25:38,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:25:38" (3/3) ... [2021-10-15 19:25:38,165 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label49.c [2021-10-15 19:25:38,171 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:25:38,171 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:25:38,220 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:25:38,228 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 19:25:38,228 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:25:38,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 198 places, 327 transitions, 654 flow [2021-10-15 19:25:38,432 INFO L129 PetriNetUnfolder]: 130/327 cut-off events. [2021-10-15 19:25:38,432 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:25:38,434 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 203 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 19:25:38,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 327 transitions, 654 flow [2021-10-15 19:25:38,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 322 transitions, 644 flow [2021-10-15 19:25:38,509 INFO L129 PetriNetUnfolder]: 103/248 cut-off events. [2021-10-15 19:25:38,509 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:25:38,509 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:38,510 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:38,510 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:38,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1165368418, now seen corresponding path program 1 times [2021-10-15 19:25:38,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:38,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372436834] [2021-10-15 19:25:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:38,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:39,025 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 19:25:39,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:39,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372436834] [2021-10-15 19:25:39,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372436834] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:39,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:25:39,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:25:39,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978993247] [2021-10-15 19:25:39,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:25:39,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:39,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:25:39,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:25:39,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:25:39,069 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 322 transitions, 644 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:39,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:39,070 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:25:39,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:40,028 INFO L129 PetriNetUnfolder]: 168/493 cut-off events. [2021-10-15 19:25:40,029 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:25:40,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 978 conditions, 493 events. 168/493 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 664 event pairs, 0 based on Foata normal form. 61/326 useless extension candidates. Maximal degree in co-relation 1. Up to 311 conditions per place. [2021-10-15 19:25:40,039 INFO L132 encePairwiseOnDemand]: 138/327 looper letters, 316 selfloop transitions, 66 changer transitions 101/489 dead transitions. [2021-10-15 19:25:40,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 489 transitions, 1944 flow [2021-10-15 19:25:40,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:25:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:25:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2021-10-15 19:25:40,068 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6085626911314985 [2021-10-15 19:25:40,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2021-10-15 19:25:40,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2021-10-15 19:25:40,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:40,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2021-10-15 19:25:40,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:40,099 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 19:25:40,101 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 19:25:40,103 INFO L186 Difference]: Start difference. First operand has 195 places, 322 transitions, 644 flow. Second operand 3 states and 597 transitions. [2021-10-15 19:25:40,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 489 transitions, 1944 flow [2021-10-15 19:25:40,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 489 transitions, 1944 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:25:40,134 INFO L242 Difference]: Finished difference. Result has 199 places, 261 transitions, 910 flow [2021-10-15 19:25:40,137 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=910, PETRI_PLACES=199, PETRI_TRANSITIONS=261} [2021-10-15 19:25:40,138 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, 4 predicate places. [2021-10-15 19:25:40,139 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 261 transitions, 910 flow [2021-10-15 19:25:40,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:40,140 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:40,140 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 19:25:40,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:25:40,141 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:40,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:40,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1528439098, now seen corresponding path program 1 times [2021-10-15 19:25:40,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:40,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069978648] [2021-10-15 19:25:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:40,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:25:40,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:40,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069978648] [2021-10-15 19:25:40,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069978648] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:40,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:25:40,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:25:40,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029873631] [2021-10-15 19:25:40,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:25:40,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:40,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:25:40,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:25:40,298 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:25:40,298 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 261 transitions, 910 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:40,299 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:40,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:25:40,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:41,082 INFO L129 PetriNetUnfolder]: 218/745 cut-off events. [2021-10-15 19:25:41,084 INFO L130 PetriNetUnfolder]: For 136/136 co-relation queries the response was YES. [2021-10-15 19:25:41,086 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 745 events. 218/745 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1617 event pairs, 0 based on Foata normal form. 36/781 useless extension candidates. Maximal degree in co-relation 772. Up to 457 conditions per place. [2021-10-15 19:25:41,095 INFO L132 encePairwiseOnDemand]: 259/327 looper letters, 357 selfloop transitions, 116 changer transitions 0/479 dead transitions. [2021-10-15 19:25:41,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 479 transitions, 2568 flow [2021-10-15 19:25:41,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:25:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:25:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2021-10-15 19:25:41,100 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4240570846075433 [2021-10-15 19:25:41,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2021-10-15 19:25:41,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2021-10-15 19:25:41,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:41,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2021-10-15 19:25:41,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:41,111 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 19:25:41,112 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 19:25:41,113 INFO L186 Difference]: Start difference. First operand has 199 places, 261 transitions, 910 flow. Second operand 3 states and 416 transitions. [2021-10-15 19:25:41,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 479 transitions, 2568 flow [2021-10-15 19:25:41,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 479 transitions, 2342 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:25:41,158 INFO L242 Difference]: Finished difference. Result has 141 places, 352 transitions, 1812 flow [2021-10-15 19:25:41,160 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1812, PETRI_PLACES=141, PETRI_TRANSITIONS=352} [2021-10-15 19:25:41,167 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -54 predicate places. [2021-10-15 19:25:41,168 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 352 transitions, 1812 flow [2021-10-15 19:25:41,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:41,168 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:41,169 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:41,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:25:41,170 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:41,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:41,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1628864191, now seen corresponding path program 1 times [2021-10-15 19:25:41,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:41,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068191769] [2021-10-15 19:25:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:41,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:25:41,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:41,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068191769] [2021-10-15 19:25:41,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068191769] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:41,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:25:41,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:25:41,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574040814] [2021-10-15 19:25:41,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:25:41,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:41,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:25:41,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:25:41,312 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:25:41,312 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 352 transitions, 1812 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 19:25:41,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:41,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:25:41,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:42,159 INFO L129 PetriNetUnfolder]: 267/1187 cut-off events. [2021-10-15 19:25:42,159 INFO L130 PetriNetUnfolder]: For 726/726 co-relation queries the response was YES. [2021-10-15 19:25:42,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3024 conditions, 1187 events. 267/1187 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3698 event pairs, 0 based on Foata normal form. 102/1289 useless extension candidates. Maximal degree in co-relation 842. Up to 672 conditions per place. [2021-10-15 19:25:42,170 INFO L132 encePairwiseOnDemand]: 259/327 looper letters, 404 selfloop transitions, 118 changer transitions 0/528 dead transitions. [2021-10-15 19:25:42,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 528 transitions, 3450 flow [2021-10-15 19:25:42,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:25:42,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:25:42,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2021-10-15 19:25:42,174 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4240570846075433 [2021-10-15 19:25:42,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2021-10-15 19:25:42,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2021-10-15 19:25:42,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:42,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2021-10-15 19:25:42,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:42,180 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 19:25:42,182 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 19:25:42,182 INFO L186 Difference]: Start difference. First operand has 141 places, 352 transitions, 1812 flow. Second operand 3 states and 416 transitions. [2021-10-15 19:25:42,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 528 transitions, 3450 flow [2021-10-15 19:25:42,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 528 transitions, 3172 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:25:42,243 INFO L242 Difference]: Finished difference. Result has 143 places, 401 transitions, 2564 flow [2021-10-15 19:25:42,244 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2564, PETRI_PLACES=143, PETRI_TRANSITIONS=401} [2021-10-15 19:25:42,244 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -52 predicate places. [2021-10-15 19:25:42,245 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 401 transitions, 2564 flow [2021-10-15 19:25:42,245 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 19:25:42,245 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:42,246 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 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 19:25:42,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:25:42,246 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:42,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:42,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1443990833, now seen corresponding path program 1 times [2021-10-15 19:25:42,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:42,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811182945] [2021-10-15 19:25:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:42,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:25:42,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:42,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811182945] [2021-10-15 19:25:42,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811182945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:42,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:25:42,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:25:42,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986481637] [2021-10-15 19:25:42,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:25:42,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:42,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:25:42,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:25:42,348 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:25:42,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 401 transitions, 2564 flow. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:42,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:42,349 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:25:42,349 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:43,483 INFO L129 PetriNetUnfolder]: 292/1474 cut-off events. [2021-10-15 19:25:43,484 INFO L130 PetriNetUnfolder]: For 1492/1492 co-relation queries the response was YES. [2021-10-15 19:25:43,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3885 conditions, 1474 events. 292/1474 cut-off events. For 1492/1492 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 5612 event pairs, 0 based on Foata normal form. 66/1540 useless extension candidates. Maximal degree in co-relation 979. Up to 761 conditions per place. [2021-10-15 19:25:43,497 INFO L132 encePairwiseOnDemand]: 275/327 looper letters, 409 selfloop transitions, 138 changer transitions 0/553 dead transitions. [2021-10-15 19:25:43,497 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 553 transitions, 4138 flow [2021-10-15 19:25:43,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:25:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:25:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2021-10-15 19:25:43,501 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4057084607543323 [2021-10-15 19:25:43,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2021-10-15 19:25:43,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2021-10-15 19:25:43,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:43,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2021-10-15 19:25:43,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:43,508 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 19:25:43,510 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 19:25:43,511 INFO L186 Difference]: Start difference. First operand has 143 places, 401 transitions, 2564 flow. Second operand 3 states and 398 transitions. [2021-10-15 19:25:43,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 553 transitions, 4138 flow [2021-10-15 19:25:43,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 553 transitions, 3876 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:25:43,551 INFO L242 Difference]: Finished difference. Result has 145 places, 426 transitions, 3208 flow [2021-10-15 19:25:43,552 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2232, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3208, PETRI_PLACES=145, PETRI_TRANSITIONS=426} [2021-10-15 19:25:43,552 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -50 predicate places. [2021-10-15 19:25:43,552 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 426 transitions, 3208 flow [2021-10-15 19:25:43,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:43,553 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:43,553 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:43,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:25:43,554 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:43,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:43,555 INFO L82 PathProgramCache]: Analyzing trace with hash -666214665, now seen corresponding path program 1 times [2021-10-15 19:25:43,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:43,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188188640] [2021-10-15 19:25:43,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:43,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:25:43,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:43,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188188640] [2021-10-15 19:25:43,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188188640] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:43,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:25:43,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:25:43,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472150066] [2021-10-15 19:25:43,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:25:43,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:43,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:25:43,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:25:43,701 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:25:43,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 426 transitions, 3208 flow. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:43,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:43,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:25:43,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:45,353 INFO L129 PetriNetUnfolder]: 413/2381 cut-off events. [2021-10-15 19:25:45,353 INFO L130 PetriNetUnfolder]: For 3651/3651 co-relation queries the response was YES. [2021-10-15 19:25:45,356 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6388 conditions, 2381 events. 413/2381 cut-off events. For 3651/3651 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 11290 event pairs, 0 based on Foata normal form. 102/2483 useless extension candidates. Maximal degree in co-relation 3164. Up to 916 conditions per place. [2021-10-15 19:25:45,372 INFO L132 encePairwiseOnDemand]: 259/327 looper letters, 517 selfloop transitions, 278 changer transitions 0/801 dead transitions. [2021-10-15 19:25:45,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 801 transitions, 6554 flow [2021-10-15 19:25:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:25:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:25:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 606 transitions. [2021-10-15 19:25:45,377 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.463302752293578 [2021-10-15 19:25:45,378 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 606 transitions. [2021-10-15 19:25:45,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 606 transitions. [2021-10-15 19:25:45,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:45,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 606 transitions. [2021-10-15 19:25:45,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:45,386 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 19:25:45,388 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 19:25:45,389 INFO L186 Difference]: Start difference. First operand has 145 places, 426 transitions, 3208 flow. Second operand 4 states and 606 transitions. [2021-10-15 19:25:45,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 801 transitions, 6554 flow [2021-10-15 19:25:45,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 801 transitions, 6158 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:25:45,439 INFO L242 Difference]: Finished difference. Result has 149 places, 547 transitions, 5400 flow [2021-10-15 19:25:45,440 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2932, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5400, PETRI_PLACES=149, PETRI_TRANSITIONS=547} [2021-10-15 19:25:45,441 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -46 predicate places. [2021-10-15 19:25:45,441 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 547 transitions, 5400 flow [2021-10-15 19:25:45,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:45,442 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:45,442 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:25:45,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:25:45,443 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:45,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:45,444 INFO L82 PathProgramCache]: Analyzing trace with hash -728537834, now seen corresponding path program 1 times [2021-10-15 19:25:45,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:45,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395113156] [2021-10-15 19:25:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:45,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:25:45,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:45,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395113156] [2021-10-15 19:25:45,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395113156] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:25:45,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002446587] [2021-10-15 19:25:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:45,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:45,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:25:45,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:25:45,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:25:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:45,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:25:45,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:25:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-15 19:25:46,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002446587] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:46,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:25:46,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-10-15 19:25:46,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290021855] [2021-10-15 19:25:46,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:25:46,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:46,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:25:46,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:25:46,588 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:25:46,589 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 547 transitions, 5400 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:46,589 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:46,589 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:25:46,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:48,196 INFO L129 PetriNetUnfolder]: 470/2700 cut-off events. [2021-10-15 19:25:48,197 INFO L130 PetriNetUnfolder]: For 5650/5650 co-relation queries the response was YES. [2021-10-15 19:25:48,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7822 conditions, 2700 events. 470/2700 cut-off events. For 5650/5650 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 13625 event pairs, 0 based on Foata normal form. 3/2703 useless extension candidates. Maximal degree in co-relation 2530. Up to 1403 conditions per place. [2021-10-15 19:25:48,223 INFO L132 encePairwiseOnDemand]: 270/327 looper letters, 499 selfloop transitions, 226 changer transitions 0/731 dead transitions. [2021-10-15 19:25:48,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 731 transitions, 7878 flow [2021-10-15 19:25:48,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:25:48,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:25:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2021-10-15 19:25:48,227 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4057084607543323 [2021-10-15 19:25:48,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2021-10-15 19:25:48,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2021-10-15 19:25:48,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:48,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2021-10-15 19:25:48,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:48,233 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 19:25:48,235 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 19:25:48,236 INFO L186 Difference]: Start difference. First operand has 149 places, 547 transitions, 5400 flow. Second operand 3 states and 398 transitions. [2021-10-15 19:25:48,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 731 transitions, 7878 flow [2021-10-15 19:25:48,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 731 transitions, 7878 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:25:48,298 INFO L242 Difference]: Finished difference. Result has 153 places, 604 transitions, 7198 flow [2021-10-15 19:25:48,299 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=5360, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7198, PETRI_PLACES=153, PETRI_TRANSITIONS=604} [2021-10-15 19:25:48,300 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -42 predicate places. [2021-10-15 19:25:48,300 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 604 transitions, 7198 flow [2021-10-15 19:25:48,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:48,301 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:48,301 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:25:48,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:25:48,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:48,524 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:48,525 INFO L82 PathProgramCache]: Analyzing trace with hash 620367149, now seen corresponding path program 1 times [2021-10-15 19:25:48,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:48,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576010096] [2021-10-15 19:25:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:48,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 132 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-10-15 19:25:48,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:48,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576010096] [2021-10-15 19:25:48,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576010096] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:25:48,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138623274] [2021-10-15 19:25:48,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:48,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:48,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:25:48,728 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:25:48,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:25:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:48,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:25:48,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:25:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-10-15 19:25:49,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138623274] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:49,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:25:49,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:25:49,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508625638] [2021-10-15 19:25:49,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:25:49,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:49,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:25:49,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:25:49,753 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:25:49,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 604 transitions, 7198 flow. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:49,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:49,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:25:49,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:51,721 INFO L129 PetriNetUnfolder]: 361/2982 cut-off events. [2021-10-15 19:25:51,721 INFO L130 PetriNetUnfolder]: For 10026/10026 co-relation queries the response was YES. [2021-10-15 19:25:51,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8229 conditions, 2982 events. 361/2982 cut-off events. For 10026/10026 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 17142 event pairs, 0 based on Foata normal form. 176/3158 useless extension candidates. Maximal degree in co-relation 2740. Up to 1594 conditions per place. [2021-10-15 19:25:51,733 INFO L132 encePairwiseOnDemand]: 267/327 looper letters, 0 selfloop transitions, 0 changer transitions 620/620 dead transitions. [2021-10-15 19:25:51,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 620 transitions, 7140 flow [2021-10-15 19:25:51,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:25:51,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:25:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2021-10-15 19:25:51,737 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40468909276248727 [2021-10-15 19:25:51,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2021-10-15 19:25:51,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2021-10-15 19:25:51,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:51,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2021-10-15 19:25:51,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:51,743 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 19:25:51,744 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 19:25:51,745 INFO L186 Difference]: Start difference. First operand has 153 places, 604 transitions, 7198 flow. Second operand 3 states and 397 transitions. [2021-10-15 19:25:51,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 620 transitions, 7140 flow [2021-10-15 19:25:51,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 620 transitions, 6810 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:25:51,797 INFO L242 Difference]: Finished difference. Result has 151 places, 0 transitions, 0 flow [2021-10-15 19:25:51,798 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=5230, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=151, PETRI_TRANSITIONS=0} [2021-10-15 19:25:51,798 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -44 predicate places. [2021-10-15 19:25:51,798 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 0 transitions, 0 flow [2021-10-15 19:25:51,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:51,801 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:25:51,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:25:52,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:52,033 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:25:52,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:25:52 BoogieIcfgContainer [2021-10-15 19:25:52,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:25:52,040 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:25:52,041 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:25:52,041 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:25:52,041 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:25:38" (3/4) ... [2021-10-15 19:25:52,045 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:25:52,072 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:25:52,081 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:25:52,082 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:25:52,084 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:25:52,288 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:25:52,288 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:25:52,290 INFO L168 Benchmark]: Toolchain (without parser) took 16424.01 ms. Allocated memory was 96.5 MB in the beginning and 211.8 MB in the end (delta: 115.3 MB). Free memory was 61.9 MB in the beginning and 56.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 119.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:25:52,294 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 53.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:25:52,296 INFO L168 Benchmark]: CACSL2BoogieTranslator took 736.54 ms. Allocated memory is still 96.5 MB. Free memory was 61.7 MB in the beginning and 56.0 MB in the end (delta: 5.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:25:52,297 INFO L168 Benchmark]: Boogie Procedure Inliner took 114.58 ms. Allocated memory is still 96.5 MB. Free memory was 56.0 MB in the beginning and 50.3 MB in the end (delta: 5.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:25:52,298 INFO L168 Benchmark]: Boogie Preprocessor took 121.12 ms. Allocated memory is still 96.5 MB. Free memory was 50.3 MB in the beginning and 46.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:25:52,299 INFO L168 Benchmark]: RCFGBuilder took 1314.11 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 46.1 MB in the beginning and 46.8 MB in the end (delta: -633.4 kB). Peak memory consumption was 27.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:25:52,300 INFO L168 Benchmark]: TraceAbstraction took 13882.58 ms. Allocated memory was 117.4 MB in the beginning and 211.8 MB in the end (delta: 94.4 MB). Free memory was 46.8 MB in the beginning and 70.1 MB in the end (delta: -23.4 MB). Peak memory consumption was 94.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:25:52,300 INFO L168 Benchmark]: Witness Printer took 247.88 ms. Allocated memory is still 211.8 MB. Free memory was 70.1 MB in the beginning and 56.5 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:25:52,303 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 53.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 736.54 ms. Allocated memory is still 96.5 MB. Free memory was 61.7 MB in the beginning and 56.0 MB in the end (delta: 5.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 114.58 ms. Allocated memory is still 96.5 MB. Free memory was 56.0 MB in the beginning and 50.3 MB in the end (delta: 5.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 121.12 ms. Allocated memory is still 96.5 MB. Free memory was 50.3 MB in the beginning and 46.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1314.11 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 46.1 MB in the beginning and 46.8 MB in the end (delta: -633.4 kB). Peak memory consumption was 27.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13882.58 ms. Allocated memory was 117.4 MB in the beginning and 211.8 MB in the end (delta: 94.4 MB). Free memory was 46.8 MB in the beginning and 70.1 MB in the end (delta: -23.4 MB). Peak memory consumption was 94.7 MB. Max. memory is 16.1 GB. * Witness Printer took 247.88 ms. Allocated memory is still 211.8 MB. Free memory was 70.1 MB in the beginning and 56.5 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: 507]: 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: 47.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13817.0ms, OverallIterations: 7, TraceHistogramMax: 6, EmptinessCheckTime: 0.0ms, AutomataDifference: 9603.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 233.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 391 SDtfs, 955 SDslu, 0 SDs, 0 SdLazy, 2492 SolverSat, 576 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3183.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 371 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7198occurred in iteration=6, InterpolantAutomatonStates: 22, 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: 153.3ms SsaConstructionTime, 468.2ms SatisfiabilityAnalysisTime, 2454.2ms InterpolantComputationTime, 1302 NumberOfCodeBlocks, 1302 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 1293 ConstructedInterpolants, 0 QuantifiedInterpolants, 3145 SizeOfPredicates, 0 NumberOfNonLiveVariables, 702 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 512/554 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 19:25:52,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e901369-0e98-404c-9718-6b08fd0f5144/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...