./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem10_label38.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_fb59a031-8194-4024-bed6-e0c2759a65de/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb59a031-8194-4024-bed6-e0c2759a65de/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_fb59a031-8194-4024-bed6-e0c2759a65de/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb59a031-8194-4024-bed6-e0c2759a65de/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem10_label38.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb59a031-8194-4024-bed6-e0c2759a65de/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_fb59a031-8194-4024-bed6-e0c2759a65de/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 995dfe15d301b87309e66e36cf0721dababde735 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 19:06:47,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:06:47,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:06:47,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:06:47,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:06:47,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:06:47,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:06:47,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:06:47,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:06:47,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:06:47,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:06:47,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:06:47,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:06:47,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:06:47,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:06:47,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:06:47,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:06:47,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:06:47,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:06:47,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:06:47,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:06:47,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:06:47,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:06:47,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:06:47,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:06:47,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:06:47,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:06:47,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:06:47,716 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:06:47,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:06:47,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:06:47,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:06:47,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:06:47,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:06:47,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:06:47,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:06:47,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:06:47,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:06:47,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:06:47,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:06:47,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:06:47,727 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb59a031-8194-4024-bed6-e0c2759a65de/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:06:47,750 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:06:47,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:06:47,751 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:06:47,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:06:47,753 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:06:47,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:06:47,754 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:06:47,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:06:47,754 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:06:47,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:06:47,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:06:47,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:06:47,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:06:47,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:06:47,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:06:47,756 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:06:47,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:06:47,756 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:06:47,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:06:47,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:06:47,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:06:47,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:06:47,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:47,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:06:47,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:06:47,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:06:47,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:06:47,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:06:47,759 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:06:47,759 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:06:47,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:06:47,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:06:47,760 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_fb59a031-8194-4024-bed6-e0c2759a65de/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb59a031-8194-4024-bed6-e0c2759a65de/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 995dfe15d301b87309e66e36cf0721dababde735 [2021-10-15 19:06:48,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:06:48,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:06:48,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:06:48,053 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:06:48,054 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:06:48,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb59a031-8194-4024-bed6-e0c2759a65de/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem10_label38.c [2021-10-15 19:06:48,132 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb59a031-8194-4024-bed6-e0c2759a65de/bin/uautomizer-hJ6jxDFKc3/data/b86e210ae/467fe2e81fe946d8af58ed061383a223/FLAGd1e92422d [2021-10-15 19:06:48,694 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:06:48,695 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb59a031-8194-4024-bed6-e0c2759a65de/sv-benchmarks/c/eca-rers2012/Problem10_label38.c [2021-10-15 19:06:48,722 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb59a031-8194-4024-bed6-e0c2759a65de/bin/uautomizer-hJ6jxDFKc3/data/b86e210ae/467fe2e81fe946d8af58ed061383a223/FLAGd1e92422d [2021-10-15 19:06:49,136 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb59a031-8194-4024-bed6-e0c2759a65de/bin/uautomizer-hJ6jxDFKc3/data/b86e210ae/467fe2e81fe946d8af58ed061383a223 [2021-10-15 19:06:49,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:06:49,143 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:06:49,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:49,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:06:49,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:06:49,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:49" (1/1) ... [2021-10-15 19:06:49,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad56480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:49, skipping insertion in model container [2021-10-15 19:06:49,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:49" (1/1) ... [2021-10-15 19:06:49,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:06:49,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:06:49,416 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_fb59a031-8194-4024-bed6-e0c2759a65de/sv-benchmarks/c/eca-rers2012/Problem10_label38.c[3802,3815] [2021-10-15 19:06:49,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:49,611 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:06:49,647 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_fb59a031-8194-4024-bed6-e0c2759a65de/sv-benchmarks/c/eca-rers2012/Problem10_label38.c[3802,3815] [2021-10-15 19:06:49,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:49,735 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:06:49,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:49 WrapperNode [2021-10-15 19:06:49,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:49,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:49,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:06:49,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:06:49,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:49" (1/1) ... [2021-10-15 19:06:49,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:49" (1/1) ... [2021-10-15 19:06:49,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:49,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:06:49,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:06:49,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:06:49,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:49" (1/1) ... [2021-10-15 19:06:49,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:49" (1/1) ... [2021-10-15 19:06:49,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:49" (1/1) ... [2021-10-15 19:06:49,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:49" (1/1) ... [2021-10-15 19:06:49,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:49" (1/1) ... [2021-10-15 19:06:49,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:49" (1/1) ... [2021-10-15 19:06:49,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:49" (1/1) ... [2021-10-15 19:06:49,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:06:49,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:06:49,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:06:49,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:06:49,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:49" (1/1) ... [2021-10-15 19:06:49,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:49,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb59a031-8194-4024-bed6-e0c2759a65de/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:49,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb59a031-8194-4024-bed6-e0c2759a65de/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:06:50,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb59a031-8194-4024-bed6-e0c2759a65de/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:06:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:06:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:06:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:06:50,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:06:51,339 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:06:51,339 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:06:51,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:51 BoogieIcfgContainer [2021-10-15 19:06:51,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:06:51,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:06:51,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:06:51,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:06:51,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:06:49" (1/3) ... [2021-10-15 19:06:51,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4efa17a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:51, skipping insertion in model container [2021-10-15 19:06:51,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:49" (2/3) ... [2021-10-15 19:06:51,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4efa17a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:51, skipping insertion in model container [2021-10-15 19:06:51,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:51" (3/3) ... [2021-10-15 19:06:51,363 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10_label38.c [2021-10-15 19:06:51,368 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:06:51,384 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:06:51,477 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:06:51,498 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 19:06:51,498 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:06:51,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 206 places, 344 transitions, 688 flow [2021-10-15 19:06:51,650 INFO L129 PetriNetUnfolder]: 139/344 cut-off events. [2021-10-15 19:06:51,651 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:51,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 344 events. 139/344 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 210 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2021-10-15 19:06:51,653 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 344 transitions, 688 flow [2021-10-15 19:06:51,672 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 339 transitions, 678 flow [2021-10-15 19:06:51,682 INFO L129 PetriNetUnfolder]: 28/88 cut-off events. [2021-10-15 19:06:51,683 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:51,683 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:51,684 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] [2021-10-15 19:06:51,684 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:51,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:51,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1317301102, now seen corresponding path program 1 times [2021-10-15 19:06:51,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:51,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692764303] [2021-10-15 19:06:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:51,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:52,000 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 19:06:52,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:52,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692764303] [2021-10-15 19:06:52,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692764303] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:52,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:52,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:52,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026486844] [2021-10-15 19:06:52,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:06:52,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:52,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:06:52,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:06:52,039 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:06:52,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 339 transitions, 678 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:52,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:52,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:06:52,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:53,642 INFO L129 PetriNetUnfolder]: 202/684 cut-off events. [2021-10-15 19:06:53,642 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:53,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1359 conditions, 684 events. 202/684 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 841 event pairs, 0 based on Foata normal form. 63/483 useless extension candidates. Maximal degree in co-relation 1. Up to 369 conditions per place. [2021-10-15 19:06:53,650 INFO L132 encePairwiseOnDemand]: 146/344 looper letters, 484 selfloop transitions, 86 changer transitions 103/678 dead transitions. [2021-10-15 19:06:53,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 678 transitions, 2702 flow [2021-10-15 19:06:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:06:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:06:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 912 transitions. [2021-10-15 19:06:53,671 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6627906976744186 [2021-10-15 19:06:53,671 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 912 transitions. [2021-10-15 19:06:53,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 912 transitions. [2021-10-15 19:06:53,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:53,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 912 transitions. [2021-10-15 19:06:53,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:53,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:53,696 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:53,698 INFO L186 Difference]: Start difference. First operand has 203 places, 339 transitions, 678 flow. Second operand 4 states and 912 transitions. [2021-10-15 19:06:53,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 678 transitions, 2702 flow [2021-10-15 19:06:53,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 678 transitions, 2702 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:53,724 INFO L242 Difference]: Finished difference. Result has 209 places, 303 transitions, 1234 flow [2021-10-15 19:06:53,726 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1234, PETRI_PLACES=209, PETRI_TRANSITIONS=303} [2021-10-15 19:06:53,727 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, 6 predicate places. [2021-10-15 19:06:53,727 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 303 transitions, 1234 flow [2021-10-15 19:06:53,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:53,728 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:53,729 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:06:53,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:06:53,729 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:53,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:53,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1294212700, now seen corresponding path program 1 times [2021-10-15 19:06:53,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:53,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429975043] [2021-10-15 19:06:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:53,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:54,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:54,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429975043] [2021-10-15 19:06:54,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429975043] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:54,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:54,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:54,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185568004] [2021-10-15 19:06:54,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:06:54,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:54,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:06:54,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:06:54,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 344 [2021-10-15 19:06:54,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 303 transitions, 1234 flow. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:54,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:54,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 344 [2021-10-15 19:06:54,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:54,880 INFO L129 PetriNetUnfolder]: 156/581 cut-off events. [2021-10-15 19:06:54,880 INFO L130 PetriNetUnfolder]: For 151/151 co-relation queries the response was YES. [2021-10-15 19:06:54,881 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1460 conditions, 581 events. 156/581 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 449 event pairs, 0 based on Foata normal form. 5/586 useless extension candidates. Maximal degree in co-relation 882. Up to 308 conditions per place. [2021-10-15 19:06:54,886 INFO L132 encePairwiseOnDemand]: 279/344 looper letters, 304 selfloop transitions, 129 changer transitions 0/437 dead transitions. [2021-10-15 19:06:54,887 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 437 transitions, 2348 flow [2021-10-15 19:06:54,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:06:54,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:06:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 398 transitions. [2021-10-15 19:06:54,890 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2313953488372093 [2021-10-15 19:06:54,891 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 398 transitions. [2021-10-15 19:06:54,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 398 transitions. [2021-10-15 19:06:54,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:54,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 398 transitions. [2021-10-15 19:06:54,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.6) internal successors, (398), 5 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 19:06:54,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:54,900 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:54,901 INFO L186 Difference]: Start difference. First operand has 209 places, 303 transitions, 1234 flow. Second operand 5 states and 398 transitions. [2021-10-15 19:06:54,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 437 transitions, 2348 flow [2021-10-15 19:06:54,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 437 transitions, 2348 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:54,928 INFO L242 Difference]: Finished difference. Result has 156 places, 301 transitions, 1609 flow [2021-10-15 19:06:54,929 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1609, PETRI_PLACES=156, PETRI_TRANSITIONS=301} [2021-10-15 19:06:54,929 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -47 predicate places. [2021-10-15 19:06:54,929 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 301 transitions, 1609 flow [2021-10-15 19:06:54,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:54,930 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:54,930 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:54,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:06:54,931 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:54,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:54,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1662568780, now seen corresponding path program 1 times [2021-10-15 19:06:54,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:54,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655655624] [2021-10-15 19:06:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:54,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:55,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:55,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655655624] [2021-10-15 19:06:55,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655655624] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:55,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:55,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:55,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666960548] [2021-10-15 19:06:55,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:55,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:55,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:55,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:55,068 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:06:55,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 301 transitions, 1609 flow. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:55,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:55,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:06:55,069 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:55,896 INFO L129 PetriNetUnfolder]: 176/882 cut-off events. [2021-10-15 19:06:55,897 INFO L130 PetriNetUnfolder]: For 1484/1484 co-relation queries the response was YES. [2021-10-15 19:06:55,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2261 conditions, 882 events. 176/882 cut-off events. For 1484/1484 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1396 event pairs, 0 based on Foata normal form. 131/1013 useless extension candidates. Maximal degree in co-relation 1280. Up to 535 conditions per place. [2021-10-15 19:06:55,904 INFO L132 encePairwiseOnDemand]: 268/344 looper letters, 403 selfloop transitions, 47 changer transitions 0/457 dead transitions. [2021-10-15 19:06:55,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 457 transitions, 2951 flow [2021-10-15 19:06:55,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:55,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2021-10-15 19:06:55,908 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43507751937984496 [2021-10-15 19:06:55,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2021-10-15 19:06:55,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2021-10-15 19:06:55,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:55,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2021-10-15 19:06:55,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:55,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:55,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:55,916 INFO L186 Difference]: Start difference. First operand has 156 places, 301 transitions, 1609 flow. Second operand 3 states and 449 transitions. [2021-10-15 19:06:55,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 457 transitions, 2951 flow [2021-10-15 19:06:55,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 457 transitions, 2945 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:55,981 INFO L242 Difference]: Finished difference. Result has 159 places, 321 transitions, 2209 flow [2021-10-15 19:06:55,982 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2209, PETRI_PLACES=159, PETRI_TRANSITIONS=321} [2021-10-15 19:06:55,982 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -44 predicate places. [2021-10-15 19:06:55,982 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 321 transitions, 2209 flow [2021-10-15 19:06:55,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:55,983 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:55,983 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:55,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:06:55,984 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:55,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:55,985 INFO L82 PathProgramCache]: Analyzing trace with hash -844699046, now seen corresponding path program 1 times [2021-10-15 19:06:55,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:55,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499225278] [2021-10-15 19:06:55,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:55,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:56,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:56,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499225278] [2021-10-15 19:06:56,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499225278] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:56,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:56,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:06:56,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661044704] [2021-10-15 19:06:56,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:06:56,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:56,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:06:56,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:06:56,305 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:06:56,305 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 321 transitions, 2209 flow. Second operand has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:56,305 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:56,306 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:06:56,306 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:57,319 INFO L129 PetriNetUnfolder]: 175/936 cut-off events. [2021-10-15 19:06:57,320 INFO L130 PetriNetUnfolder]: For 1658/1658 co-relation queries the response was YES. [2021-10-15 19:06:57,321 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2588 conditions, 936 events. 175/936 cut-off events. For 1658/1658 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1358 event pairs, 0 based on Foata normal form. 1/937 useless extension candidates. Maximal degree in co-relation 1626. Up to 854 conditions per place. [2021-10-15 19:06:57,328 INFO L132 encePairwiseOnDemand]: 338/344 looper letters, 310 selfloop transitions, 1 changer transitions 54/372 dead transitions. [2021-10-15 19:06:57,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 372 transitions, 3041 flow [2021-10-15 19:06:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:06:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:06:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 321 transitions. [2021-10-15 19:06:57,332 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.13330564784053156 [2021-10-15 19:06:57,332 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 321 transitions. [2021-10-15 19:06:57,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 321 transitions. [2021-10-15 19:06:57,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:57,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 321 transitions. [2021-10-15 19:06:57,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 45.857142857142854) internal successors, (321), 7 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:57,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:57,344 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:57,344 INFO L186 Difference]: Start difference. First operand has 159 places, 321 transitions, 2209 flow. Second operand 7 states and 321 transitions. [2021-10-15 19:06:57,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 372 transitions, 3041 flow [2021-10-15 19:06:57,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 372 transitions, 2927 flow, removed 10 selfloop flow, removed 2 redundant places. [2021-10-15 19:06:57,388 INFO L242 Difference]: Finished difference. Result has 167 places, 318 transitions, 2083 flow [2021-10-15 19:06:57,388 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2083, PETRI_PLACES=167, PETRI_TRANSITIONS=318} [2021-10-15 19:06:57,389 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -36 predicate places. [2021-10-15 19:06:57,389 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 318 transitions, 2083 flow [2021-10-15 19:06:57,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:57,390 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:57,391 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:57,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:06:57,391 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:57,392 INFO L82 PathProgramCache]: Analyzing trace with hash -65230720, now seen corresponding path program 1 times [2021-10-15 19:06:57,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:57,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728127427] [2021-10-15 19:06:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:57,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:57,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:57,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728127427] [2021-10-15 19:06:57,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728127427] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:57,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:57,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:57,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030408927] [2021-10-15 19:06:57,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:57,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:57,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:57,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:57,551 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:06:57,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 318 transitions, 2083 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:57,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:57,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:06:57,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:58,406 INFO L129 PetriNetUnfolder]: 169/1015 cut-off events. [2021-10-15 19:06:58,406 INFO L130 PetriNetUnfolder]: For 2022/2022 co-relation queries the response was YES. [2021-10-15 19:06:58,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 1015 events. 169/1015 cut-off events. For 2022/2022 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1633 event pairs, 0 based on Foata normal form. 79/1094 useless extension candidates. Maximal degree in co-relation 2672. Up to 665 conditions per place. [2021-10-15 19:06:58,412 INFO L132 encePairwiseOnDemand]: 269/344 looper letters, 0 selfloop transitions, 0 changer transitions 448/448 dead transitions. [2021-10-15 19:06:58,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 448 transitions, 3197 flow [2021-10-15 19:06:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2021-10-15 19:06:58,415 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4321705426356589 [2021-10-15 19:06:58,416 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2021-10-15 19:06:58,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2021-10-15 19:06:58,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:58,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2021-10-15 19:06:58,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,422 INFO L186 Difference]: Start difference. First operand has 167 places, 318 transitions, 2083 flow. Second operand 3 states and 446 transitions. [2021-10-15 19:06:58,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 448 transitions, 3197 flow [2021-10-15 19:06:58,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 448 transitions, 3180 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-10-15 19:06:58,453 INFO L242 Difference]: Finished difference. Result has 158 places, 0 transitions, 0 flow [2021-10-15 19:06:58,454 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=158, PETRI_TRANSITIONS=0} [2021-10-15 19:06:58,454 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -45 predicate places. [2021-10-15 19:06:58,454 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 0 transitions, 0 flow [2021-10-15 19:06:58,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:58,457 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:06:58,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:06:58,463 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:06:58,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:06:58 BoogieIcfgContainer [2021-10-15 19:06:58,469 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:06:58,469 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:06:58,469 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:06:58,470 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:06:58,470 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:51" (3/4) ... [2021-10-15 19:06:58,473 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:06:58,493 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:06:58,494 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:06:58,495 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:06:58,497 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:06:58,639 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb59a031-8194-4024-bed6-e0c2759a65de/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:06:58,639 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:06:58,640 INFO L168 Benchmark]: Toolchain (without parser) took 9495.92 ms. Allocated memory was 102.8 MB in the beginning and 184.5 MB in the end (delta: 81.8 MB). Free memory was 60.2 MB in the beginning and 54.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 85.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:58,641 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory was 78.4 MB in the beginning and 78.4 MB in the end (delta: 55.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:06:58,641 INFO L168 Benchmark]: CACSL2BoogieTranslator took 599.86 ms. Allocated memory is still 102.8 MB. Free memory was 59.9 MB in the beginning and 60.8 MB in the end (delta: -875.4 kB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:58,641 INFO L168 Benchmark]: Boogie Procedure Inliner took 111.70 ms. Allocated memory is still 102.8 MB. Free memory was 60.8 MB in the beginning and 52.9 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:58,642 INFO L168 Benchmark]: Boogie Preprocessor took 97.29 ms. Allocated memory is still 102.8 MB. Free memory was 52.9 MB in the beginning and 48.0 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:58,642 INFO L168 Benchmark]: RCFGBuilder took 1386.15 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 48.0 MB in the beginning and 92.2 MB in the end (delta: -44.2 MB). Peak memory consumption was 30.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:58,642 INFO L168 Benchmark]: TraceAbstraction took 7121.13 ms. Allocated memory was 123.7 MB in the beginning and 184.5 MB in the end (delta: 60.8 MB). Free memory was 91.3 MB in the beginning and 69.4 MB in the end (delta: 21.9 MB). Peak memory consumption was 82.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:58,643 INFO L168 Benchmark]: Witness Printer took 169.70 ms. Allocated memory is still 184.5 MB. Free memory was 69.4 MB in the beginning and 54.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:58,645 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory was 78.4 MB in the beginning and 78.4 MB in the end (delta: 55.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 599.86 ms. Allocated memory is still 102.8 MB. Free memory was 59.9 MB in the beginning and 60.8 MB in the end (delta: -875.4 kB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 111.70 ms. Allocated memory is still 102.8 MB. Free memory was 60.8 MB in the beginning and 52.9 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 97.29 ms. Allocated memory is still 102.8 MB. Free memory was 52.9 MB in the beginning and 48.0 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1386.15 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 48.0 MB in the beginning and 92.2 MB in the end (delta: -44.2 MB). Peak memory consumption was 30.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7121.13 ms. Allocated memory was 123.7 MB in the beginning and 184.5 MB in the end (delta: 60.8 MB). Free memory was 91.3 MB in the beginning and 69.4 MB in the end (delta: 21.9 MB). Peak memory consumption was 82.4 MB. Max. memory is 16.1 GB. * Witness Printer took 169.70 ms. Allocated memory is still 184.5 MB. Free memory was 69.4 MB in the beginning and 54.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 110]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 206 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 9.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7007.0ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 5476.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 174.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 476 SDtfs, 873 SDslu, 3 SDs, 0 SdLazy, 2628 SolverSat, 506 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2742.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2209occurred in iteration=3, 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: 60.4ms SsaConstructionTime, 206.1ms SatisfiabilityAnalysisTime, 840.9ms InterpolantComputationTime, 764 NumberOfCodeBlocks, 764 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 759 ConstructedInterpolants, 0 QuantifiedInterpolants, 4280 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 422/422 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 19:06:58,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb59a031-8194-4024-bed6-e0c2759a65de/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...