./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/lu.cmp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/lu.cmp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 640282f6b7135e6e195eda6d48d5761dd6ed3cc4 ................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/lu.cmp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 640282f6b7135e6e195eda6d48d5761dd6ed3cc4 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:55:06,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:55:06,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:55:06,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:55:06,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:55:06,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:55:06,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:55:06,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:55:06,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:55:06,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:55:06,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:55:06,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:55:06,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:55:06,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:55:06,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:55:06,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:55:06,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:55:06,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:55:06,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:55:06,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:55:06,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:55:06,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:55:06,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:55:06,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:55:06,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:55:06,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:55:06,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:55:06,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:55:06,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:55:06,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:55:06,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:55:06,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:55:06,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:55:06,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:55:06,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:55:06,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:55:06,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:55:06,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:55:06,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:55:06,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:55:06,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:55:06,860 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:55:06,906 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:55:06,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:55:06,908 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:55:06,908 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:55:06,908 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:55:06,908 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:55:06,909 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:55:06,909 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:55:06,909 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:55:06,909 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:55:06,910 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:55:06,911 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:55:06,911 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:55:06,911 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:55:06,911 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:55:06,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:55:06,912 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:55:06,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:55:06,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:55:06,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:55:06,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:55:06,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:55:06,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:55:06,914 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:55:06,914 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:55:06,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:55:06,914 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:55:06,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:55:06,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:55:06,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:55:06,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:55:06,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:55:06,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:55:06,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:55:06,918 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:55:06,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:55:06,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:55:06,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:55:06,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:55:06,919 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 640282f6b7135e6e195eda6d48d5761dd6ed3cc4 [2021-10-13 07:55:07,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:55:07,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:55:07,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:55:07,218 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:55:07,218 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:55:07,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loops/lu.cmp.c [2021-10-13 07:55:07,293 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/data/16dcab740/a9ab554252cb41f69541907380105f26/FLAG11fe1b9e2 [2021-10-13 07:55:07,827 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:55:07,834 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/sv-benchmarks/c/loops/lu.cmp.c [2021-10-13 07:55:07,849 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/data/16dcab740/a9ab554252cb41f69541907380105f26/FLAG11fe1b9e2 [2021-10-13 07:55:08,145 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/data/16dcab740/a9ab554252cb41f69541907380105f26 [2021-10-13 07:55:08,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:55:08,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:55:08,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:55:08,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:55:08,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:55:08,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:55:08" (1/1) ... [2021-10-13 07:55:08,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774679ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:08, skipping insertion in model container [2021-10-13 07:55:08,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:55:08" (1/1) ... [2021-10-13 07:55:08,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:55:08,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:55:08,419 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_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/sv-benchmarks/c/loops/lu.cmp.c[318,331] [2021-10-13 07:55:08,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:55:08,479 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:55:08,491 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_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/sv-benchmarks/c/loops/lu.cmp.c[318,331] [2021-10-13 07:55:08,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:55:08,529 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:55:08,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:08 WrapperNode [2021-10-13 07:55:08,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:55:08,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:55:08,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:55:08,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:55:08,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:08" (1/1) ... [2021-10-13 07:55:08,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:08" (1/1) ... [2021-10-13 07:55:08,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:55:08,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:55:08,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:55:08,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:55:08,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:08" (1/1) ... [2021-10-13 07:55:08,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:08" (1/1) ... [2021-10-13 07:55:08,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:08" (1/1) ... [2021-10-13 07:55:08,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:08" (1/1) ... [2021-10-13 07:55:08,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:08" (1/1) ... [2021-10-13 07:55:08,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:08" (1/1) ... [2021-10-13 07:55:08,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:08" (1/1) ... [2021-10-13 07:55:08,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:55:08,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:55:08,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:55:08,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:55:08,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:08" (1/1) ... [2021-10-13 07:55:08,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:55:08,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:55:08,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:55:08,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:55:08,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:55:08,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:55:08,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-10-13 07:55:08,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-13 07:55:08,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:55:08,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:55:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:55:09,583 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:55:09,584 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-13 07:55:09,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:55:09 BoogieIcfgContainer [2021-10-13 07:55:09,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:55:09,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:55:09,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:55:09,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:55:09,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:55:08" (1/3) ... [2021-10-13 07:55:09,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0e3698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:55:09, skipping insertion in model container [2021-10-13 07:55:09,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:08" (2/3) ... [2021-10-13 07:55:09,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0e3698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:55:09, skipping insertion in model container [2021-10-13 07:55:09,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:55:09" (3/3) ... [2021-10-13 07:55:09,602 INFO L111 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2021-10-13 07:55:09,609 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:55:09,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:55:09,673 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:55:09,682 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=FINITE_AUTOMATA, 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 [2021-10-13 07:55:09,683 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:55:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 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) [2021-10-13 07:55:09,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:55:09,719 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:09,720 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:55:09,720 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:55:09,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:09,727 INFO L82 PathProgramCache]: Analyzing trace with hash 219396429, now seen corresponding path program 1 times [2021-10-13 07:55:09,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:55:09,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296526327] [2021-10-13 07:55:09,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:09,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:55:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:10,060 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:55:10,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296526327] [2021-10-13 07:55:10,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296526327] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:55:10,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:55:10,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:55:10,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92170447] [2021-10-13 07:55:10,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:55:10,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:55:10,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:55:10,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:55:10,092 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 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) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-10-13 07:55:10,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:55:10,160 INFO L93 Difference]: Finished difference Result 44 states and 73 transitions. [2021-10-13 07:55:10,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:55:10,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) Word has length 5 [2021-10-13 07:55:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:55:10,173 INFO L225 Difference]: With dead ends: 44 [2021-10-13 07:55:10,174 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 07:55:10,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:55:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 07:55:10,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-13 07:55:10,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2021-10-13 07:55:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-13 07:55:10,218 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-10-13 07:55:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:55:10,219 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-13 07:55:10,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-10-13 07:55:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-13 07:55:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:55:10,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:10,220 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:55:10,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:55:10,221 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:55:10,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:10,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1788574205, now seen corresponding path program 1 times [2021-10-13 07:55:10,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:55:10,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497442029] [2021-10-13 07:55:10,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:10,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:55:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:55:10,391 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:55:10,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497442029] [2021-10-13 07:55:10,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497442029] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:55:10,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:55:10,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:55:10,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716402009] [2021-10-13 07:55:10,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:55:10,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:55:10,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:55:10,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:55:10,403 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-13 07:55:10,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:55:10,448 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-13 07:55:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:55:10,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) Word has length 6 [2021-10-13 07:55:10,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:55:10,450 INFO L225 Difference]: With dead ends: 15 [2021-10-13 07:55:10,450 INFO L226 Difference]: Without dead ends: 13 [2021-10-13 07:55:10,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:55:10,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-13 07:55:10,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-10-13 07:55:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-10-13 07:55:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-10-13 07:55:10,456 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2021-10-13 07:55:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:55:10,456 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-10-13 07:55:10,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-13 07:55:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-10-13 07:55:10,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:55:10,458 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:10,458 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 07:55:10,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:55:10,459 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:55:10,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:10,460 INFO L82 PathProgramCache]: Analyzing trace with hash 253668577, now seen corresponding path program 1 times [2021-10-13 07:55:10,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:55:10,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188611225] [2021-10-13 07:55:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:10,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:55:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:55:10,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:55:10,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188611225] [2021-10-13 07:55:10,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188611225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:55:10,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806265244] [2021-10-13 07:55:10,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:10,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:55:10,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:55:10,553 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:55:10,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:55:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:10,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:55:10,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:55:10,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:55:10,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806265244] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:55:10,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1189548123] [2021-10-13 07:55:10,897 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-13 07:55:10,898 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:55:10,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:55:10,915 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:55:10,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:55:10,961 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:55:10,968 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:55:10,968 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:55:10,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-10-13 07:55:10,975 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:55:10,979 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:55:10,980 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-10-13 07:55:10,981 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:55:10,981 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:55:10,982 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-13 07:55:10,990 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 255 [2021-10-13 07:55:11,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:11,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:11,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:11,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:11,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:11,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:11,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:11,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:11,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:11,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:11,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:11,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:11,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:11,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:11,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:11,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 31 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2021-10-13 07:55:11,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:55:11,097 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-10-13 07:55:11,100 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:55:11,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-10-13 07:55:11,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:55:11,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:55:11,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:55:11,176 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:55:11,190 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 260 [2021-10-13 07:55:11,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:55:11,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:251, output treesize:260 [2021-10-13 07:55:11,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:55:11,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-13 07:55:11,417 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_29| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:55:11,422 INFO L168 Benchmark]: Toolchain (without parser) took 3271.15 ms. Allocated memory was 102.8 MB in the beginning and 125.8 MB in the end (delta: 23.1 MB). Free memory was 60.4 MB in the beginning and 49.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 34.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:55:11,422 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 102.8 MB. Free memory is still 76.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:55:11,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 365.84 ms. Allocated memory is still 102.8 MB. Free memory was 60.2 MB in the beginning and 73.9 MB in the end (delta: -13.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:55:11,424 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.04 ms. Allocated memory is still 102.8 MB. Free memory was 73.9 MB in the beginning and 71.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:55:11,424 INFO L168 Benchmark]: Boogie Preprocessor took 54.79 ms. Allocated memory is still 102.8 MB. Free memory was 71.6 MB in the beginning and 69.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:55:11,425 INFO L168 Benchmark]: RCFGBuilder took 947.99 ms. Allocated memory is still 102.8 MB. Free memory was 69.8 MB in the beginning and 44.0 MB in the end (delta: 25.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:55:11,425 INFO L168 Benchmark]: TraceAbstraction took 1830.99 ms. Allocated memory was 102.8 MB in the beginning and 125.8 MB in the end (delta: 23.1 MB). Free memory was 43.4 MB in the beginning and 49.7 MB in the end (delta: -6.3 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:55:11,429 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 102.8 MB. Free memory is still 76.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 365.84 ms. Allocated memory is still 102.8 MB. Free memory was 60.2 MB in the beginning and 73.9 MB in the end (delta: -13.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.04 ms. Allocated memory is still 102.8 MB. Free memory was 73.9 MB in the beginning and 71.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.79 ms. Allocated memory is still 102.8 MB. Free memory was 71.6 MB in the beginning and 69.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 947.99 ms. Allocated memory is still 102.8 MB. Free memory was 69.8 MB in the beginning and 44.0 MB in the end (delta: 25.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1830.99 ms. Allocated memory was 102.8 MB in the beginning and 125.8 MB in the end (delta: 23.1 MB). Free memory was 43.4 MB in the beginning and 49.7 MB in the end (delta: -6.3 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_29| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_29|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:55:11,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:55:13,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:55:13,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:55:14,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:55:14,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:55:14,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:55:14,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:55:14,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:55:14,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:55:14,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:55:14,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:55:14,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:55:14,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:55:14,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:55:14,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:55:14,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:55:14,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:55:14,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:55:14,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:55:14,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:55:14,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:55:14,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:55:14,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:55:14,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:55:14,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:55:14,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:55:14,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:55:14,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:55:14,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:55:14,074 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:55:14,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:55:14,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:55:14,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:55:14,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:55:14,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:55:14,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:55:14,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:55:14,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:55:14,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:55:14,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:55:14,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:55:14,086 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:55:14,137 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:55:14,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:55:14,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:55:14,139 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:55:14,139 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:55:14,140 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:55:14,140 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:55:14,140 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:55:14,140 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:55:14,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:55:14,143 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:55:14,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:55:14,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:55:14,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:55:14,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:55:14,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:55:14,145 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:55:14,145 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:55:14,145 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:55:14,146 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:55:14,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:55:14,146 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:55:14,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:55:14,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:55:14,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:55:14,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:55:14,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:55:14,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:55:14,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:55:14,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:55:14,149 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:55:14,149 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:55:14,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:55:14,149 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:55:14,150 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:55:14,150 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 640282f6b7135e6e195eda6d48d5761dd6ed3cc4 [2021-10-13 07:55:14,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:55:14,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:55:14,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:55:14,580 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:55:14,581 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:55:14,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loops/lu.cmp.c [2021-10-13 07:55:14,649 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/data/37f620593/cd5204380a17466ab167d1f3f0dfe8cb/FLAGad7bf6534 [2021-10-13 07:55:15,172 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:55:15,173 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/sv-benchmarks/c/loops/lu.cmp.c [2021-10-13 07:55:15,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/data/37f620593/cd5204380a17466ab167d1f3f0dfe8cb/FLAGad7bf6534 [2021-10-13 07:55:15,534 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/data/37f620593/cd5204380a17466ab167d1f3f0dfe8cb [2021-10-13 07:55:15,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:55:15,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:55:15,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:55:15,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:55:15,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:55:15,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:55:15" (1/1) ... [2021-10-13 07:55:15,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b53fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:15, skipping insertion in model container [2021-10-13 07:55:15,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:55:15" (1/1) ... [2021-10-13 07:55:15,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:55:15,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:55:15,735 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_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/sv-benchmarks/c/loops/lu.cmp.c[318,331] [2021-10-13 07:55:15,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:55:15,802 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:55:15,816 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_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/sv-benchmarks/c/loops/lu.cmp.c[318,331] [2021-10-13 07:55:15,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:55:15,894 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:55:15,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:15 WrapperNode [2021-10-13 07:55:15,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:55:15,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:55:15,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:55:15,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:55:15,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:15" (1/1) ... [2021-10-13 07:55:15,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:15" (1/1) ... [2021-10-13 07:55:15,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:55:15,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:55:15,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:55:15,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:55:15,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:15" (1/1) ... [2021-10-13 07:55:15,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:15" (1/1) ... [2021-10-13 07:55:16,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:15" (1/1) ... [2021-10-13 07:55:16,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:15" (1/1) ... [2021-10-13 07:55:16,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:15" (1/1) ... [2021-10-13 07:55:16,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:15" (1/1) ... [2021-10-13 07:55:16,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:15" (1/1) ... [2021-10-13 07:55:16,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:55:16,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:55:16,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:55:16,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:55:16,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:15" (1/1) ... [2021-10-13 07:55:16,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:55:16,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:55:16,108 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:55:16,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:55:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-10-13 07:55:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-10-13 07:55:16,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:55:16,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:55:16,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:55:16,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:55:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:55:32,519 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:55:32,520 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-13 07:55:32,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:55:32 BoogieIcfgContainer [2021-10-13 07:55:32,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:55:32,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:55:32,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:55:32,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:55:32,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:55:15" (1/3) ... [2021-10-13 07:55:32,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de9ec78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:55:32, skipping insertion in model container [2021-10-13 07:55:32,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:15" (2/3) ... [2021-10-13 07:55:32,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de9ec78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:55:32, skipping insertion in model container [2021-10-13 07:55:32,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:55:32" (3/3) ... [2021-10-13 07:55:32,533 INFO L111 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2021-10-13 07:55:32,539 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:55:32,540 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:55:32,599 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:55:32,606 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=FINITE_AUTOMATA, 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 [2021-10-13 07:55:32,607 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:55:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 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) [2021-10-13 07:55:32,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:55:32,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:32,637 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:55:32,638 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:55:32,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:32,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2021-10-13 07:55:32,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:55:32,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441886860] [2021-10-13 07:55:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:32,662 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:55:32,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:55:32,671 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:55:32,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:55:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:32,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:55:32,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:33,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:33,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:55:33,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441886860] [2021-10-13 07:55:33,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441886860] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:55:33,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:55:33,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:55:33,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108884578] [2021-10-13 07:55:33,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:55:33,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:55:33,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:55:33,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:55:33,215 INFO L87 Difference]: Start difference. First operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 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) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-10-13 07:55:35,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:55:35,038 INFO L93 Difference]: Finished difference Result 103 states and 162 transitions. [2021-10-13 07:55:35,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:55:35,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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) Word has length 7 [2021-10-13 07:55:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:55:35,056 INFO L225 Difference]: With dead ends: 103 [2021-10-13 07:55:35,056 INFO L226 Difference]: Without dead ends: 18 [2021-10-13 07:55:35,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:55:35,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-13 07:55:35,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-13 07:55:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2021-10-13 07:55:35,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-10-13 07:55:35,087 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 7 [2021-10-13 07:55:35,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:55:35,087 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-10-13 07:55:35,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-10-13 07:55:35,088 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-10-13 07:55:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:55:35,089 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:35,089 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:55:35,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:55:35,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:55:35,306 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:55:35,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:35,308 INFO L82 PathProgramCache]: Analyzing trace with hash 116728450, now seen corresponding path program 1 times [2021-10-13 07:55:35,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:55:35,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506939357] [2021-10-13 07:55:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:35,310 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:55:35,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:55:35,311 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:55:35,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:55:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:35,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:55:35,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:36,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:36,639 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:55:36,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506939357] [2021-10-13 07:55:36,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506939357] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:55:36,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1614732919] [2021-10-13 07:55:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:36,640 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:55:36,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:55:36,662 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:55:36,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-10-13 07:55:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:36,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:55:36,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:37,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:37,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1614732919] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:55:37,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8451178] [2021-10-13 07:55:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:37,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:55:37,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:55:37,366 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:55:37,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 07:55:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:37,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:55:37,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:37,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:38,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8451178] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:55:38,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:55:38,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-13 07:55:38,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328890984] [2021-10-13 07:55:38,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:55:38,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:55:38,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:55:38,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:55:38,013 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-10-13 07:55:40,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:55:40,836 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2021-10-13 07:55:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:55:40,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) Word has length 15 [2021-10-13 07:55:40,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:55:40,841 INFO L225 Difference]: With dead ends: 94 [2021-10-13 07:55:40,841 INFO L226 Difference]: Without dead ends: 78 [2021-10-13 07:55:40,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 417.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:55:40,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-13 07:55:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-10-13 07:55:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 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) [2021-10-13 07:55:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-10-13 07:55:40,856 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 15 [2021-10-13 07:55:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:55:40,856 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-10-13 07:55:40,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-10-13 07:55:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-10-13 07:55:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:55:40,858 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:40,858 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:55:40,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-10-13 07:55:41,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-13 07:55:41,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:55:41,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:55:41,461 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:55:41,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:41,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1891735812, now seen corresponding path program 1 times [2021-10-13 07:55:41,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:55:41,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675795430] [2021-10-13 07:55:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:41,463 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:55:41,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:55:41,465 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:55:41,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:55:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:41,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:55:41,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:42,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:42,824 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:55:42,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675795430] [2021-10-13 07:55:42,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675795430] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:55:42,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [71137359] [2021-10-13 07:55:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:42,826 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:55:42,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:55:42,843 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:55:42,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 07:55:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:43,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:55:43,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:43,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:43,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [71137359] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:55:43,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29924211] [2021-10-13 07:55:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:43,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:55:43,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:55:43,900 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:55:43,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 07:55:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:44,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:55:44,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 07:55:44,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 07:55:44,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29924211] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:55:44,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:55:44,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-13 07:55:44,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448502485] [2021-10-13 07:55:44,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:55:44,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:55:44,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:55:44,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:55:44,854 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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) [2021-10-13 07:55:47,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:55:47,577 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2021-10-13 07:55:47,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:55:47,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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) Word has length 15 [2021-10-13 07:55:47,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:55:47,581 INFO L225 Difference]: With dead ends: 92 [2021-10-13 07:55:47,581 INFO L226 Difference]: Without dead ends: 90 [2021-10-13 07:55:47,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 821.6ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:55:47,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-13 07:55:47,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2021-10-13 07:55:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 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) [2021-10-13 07:55:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2021-10-13 07:55:47,596 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 15 [2021-10-13 07:55:47,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:55:47,597 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2021-10-13 07:55:47,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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) [2021-10-13 07:55:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2021-10-13 07:55:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-13 07:55:47,599 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:47,599 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-10-13 07:55:47,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:55:47,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:55:48,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:55:48,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:55:48,225 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:55:48,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:48,226 INFO L82 PathProgramCache]: Analyzing trace with hash -865137092, now seen corresponding path program 1 times [2021-10-13 07:55:48,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:55:48,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529370386] [2021-10-13 07:55:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:48,227 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:55:48,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:55:48,230 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:55:48,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:55:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:49,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:55:49,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-13 07:55:49,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-13 07:55:50,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:55:50,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529370386] [2021-10-13 07:55:50,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529370386] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:55:50,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1364691407] [2021-10-13 07:55:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:50,590 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:55:50,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:55:50,597 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:55:50,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 07:55:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:51,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:55:51,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-13 07:55:51,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-13 07:55:52,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1364691407] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:55:52,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753650241] [2021-10-13 07:55:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:52,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:55:52,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:55:52,521 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:55:52,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 07:55:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:52,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:55:52,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-13 07:55:53,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-13 07:55:53,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753650241] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:55:53,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:55:53,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 5, 5, 5] total 16 [2021-10-13 07:55:53,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711903796] [2021-10-13 07:55:53,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 07:55:53,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:55:53,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 07:55:53,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:55:53,831 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 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) [2021-10-13 07:56:07,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:56:07,266 INFO L93 Difference]: Finished difference Result 266 states and 342 transitions. [2021-10-13 07:56:07,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-13 07:56:07,267 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 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) Word has length 43 [2021-10-13 07:56:07,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:56:07,270 INFO L225 Difference]: With dead ends: 266 [2021-10-13 07:56:07,270 INFO L226 Difference]: Without dead ends: 220 [2021-10-13 07:56:07,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 5793.5ms TimeCoverageRelationStatistics Valid=762, Invalid=2778, Unknown=0, NotChecked=0, Total=3540 [2021-10-13 07:56:07,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-10-13 07:56:07,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2021-10-13 07:56:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.1497584541062802) internal successors, (238), 207 states have internal predecessors, (238), 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) [2021-10-13 07:56:07,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 238 transitions. [2021-10-13 07:56:07,308 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 238 transitions. Word has length 43 [2021-10-13 07:56:07,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:56:07,308 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 238 transitions. [2021-10-13 07:56:07,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 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) [2021-10-13 07:56:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 238 transitions. [2021-10-13 07:56:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-13 07:56:07,313 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:56:07,313 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 15, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-10-13 07:56:07,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:56:07,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-10-13 07:56:07,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-13 07:56:07,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:56:07,933 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:56:07,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:56:07,934 INFO L82 PathProgramCache]: Analyzing trace with hash 556208144, now seen corresponding path program 2 times [2021-10-13 07:56:07,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:56:07,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422216554] [2021-10-13 07:56:07,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:56:07,935 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:56:07,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:56:07,936 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:56:07,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:56:08,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:56:08,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:56:08,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:56:08,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-10-13 07:56:09,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-10-13 07:56:10,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:56:10,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422216554] [2021-10-13 07:56:10,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422216554] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:10,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [501380244] [2021-10-13 07:56:10,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:56:10,760 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:56:10,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:56:10,762 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:56:10,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 07:56:11,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:56:11,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:56:11,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:56:11,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-10-13 07:56:12,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-10-13 07:56:13,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [501380244] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:13,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521299428] [2021-10-13 07:56:13,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:56:13,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:56:13,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:56:13,592 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:56:13,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 07:56:13,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:56:13,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:56:13,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:56:13,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-10-13 07:56:15,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-10-13 07:56:16,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521299428] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:16,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:56:16,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-13 07:56:16,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753181804] [2021-10-13 07:56:16,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:56:16,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:56:16,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:56:16,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:56:16,207 INFO L87 Difference]: Start difference. First operand 208 states and 238 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 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) [2021-10-13 07:56:18,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:56:18,407 INFO L93 Difference]: Finished difference Result 208 states and 238 transitions. [2021-10-13 07:56:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:56:18,408 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 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) Word has length 91 [2021-10-13 07:56:18,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:56:18,409 INFO L225 Difference]: With dead ends: 208 [2021-10-13 07:56:18,409 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:56:18,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 409.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:56:18,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:56:18,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:56:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-13 07:56:18,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:56:18,412 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 91 [2021-10-13 07:56:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:56:18,412 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:56:18,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 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) [2021-10-13 07:56:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:56:18,413 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:56:18,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:56:18,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-10-13 07:56:18,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:56:18,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-13 07:56:19,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:56:19,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:56:19,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:56:19,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:56:19,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:56:19,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:56:19,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:56:19,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:56:19,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:56:19,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:56:19,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:56:19,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:56:19,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:56:19,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:56:19,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:56:19,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:56:19,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:56:20,018 INFO L857 garLoopResultBuilder]: For program point L93-2(lines 93 104) no Hoare annotation was computed. [2021-10-13 07:56:20,019 INFO L853 garLoopResultBuilder]: At program point L93-3(lines 93 104) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~n~0 (_ bv5 32)))) (or (and .cse0 (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) (bvslt ULTIMATE.start_main_~i~0 (_ bv50 32))) (and .cse0 (= ULTIMATE.start_main_~i~0 (_ bv0 32))))) [2021-10-13 07:56:20,019 INFO L857 garLoopResultBuilder]: For program point L93-4(lines 93 104) no Hoare annotation was computed. [2021-10-13 07:56:20,019 INFO L857 garLoopResultBuilder]: For program point L118-2(lines 118 136) no Hoare annotation was computed. [2021-10-13 07:56:20,019 INFO L853 garLoopResultBuilder]: At program point L118-3(lines 118 136) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-13 07:56:20,019 INFO L857 garLoopResultBuilder]: For program point L118-4(lines 118 136) no Hoare annotation was computed. [2021-10-13 07:56:20,019 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:56:20,019 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 07:56:20,019 INFO L853 garLoopResultBuilder]: At program point L153(lines 111 155) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-13 07:56:20,020 INFO L857 garLoopResultBuilder]: For program point L120(line 120) no Hoare annotation was computed. [2021-10-13 07:56:20,020 INFO L857 garLoopResultBuilder]: For program point L129-2(lines 129 135) no Hoare annotation was computed. [2021-10-13 07:56:20,020 INFO L857 garLoopResultBuilder]: For program point L96-2(lines 96 101) no Hoare annotation was computed. [2021-10-13 07:56:20,020 INFO L853 garLoopResultBuilder]: At program point L129-3(lines 129 135) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-13 07:56:20,020 INFO L853 garLoopResultBuilder]: At program point L96-3(lines 96 101) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~n~0 (_ bv5 32)))) (or (and .cse0 (bvsle ULTIMATE.start_main_~i~0 (_ bv5 32)) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (and .cse0 (= ULTIMATE.start_main_~i~0 (_ bv0 32))))) [2021-10-13 07:56:20,020 INFO L857 garLoopResultBuilder]: For program point L96-4(lines 96 101) no Hoare annotation was computed. [2021-10-13 07:56:20,020 INFO L857 garLoopResultBuilder]: For program point L121-2(lines 121 128) no Hoare annotation was computed. [2021-10-13 07:56:20,020 INFO L853 garLoopResultBuilder]: At program point L121-3(lines 121 128) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-13 07:56:20,020 INFO L857 garLoopResultBuilder]: For program point L121-4(lines 121 128) no Hoare annotation was computed. [2021-10-13 07:56:20,021 INFO L857 garLoopResultBuilder]: For program point L80(lines 80 81) no Hoare annotation was computed. [2021-10-13 07:56:20,021 INFO L857 garLoopResultBuilder]: For program point L146-2(lines 146 152) no Hoare annotation was computed. [2021-10-13 07:56:20,021 INFO L853 garLoopResultBuilder]: At program point L146-3(lines 146 152) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-13 07:56:20,021 INFO L857 garLoopResultBuilder]: For program point L80-2(lines 80 81) no Hoare annotation was computed. [2021-10-13 07:56:20,021 INFO L857 garLoopResultBuilder]: For program point L146-4(lines 146 152) no Hoare annotation was computed. [2021-10-13 07:56:20,021 INFO L857 garLoopResultBuilder]: For program point L138-2(lines 138 144) no Hoare annotation was computed. [2021-10-13 07:56:20,021 INFO L853 garLoopResultBuilder]: At program point L138-3(lines 138 144) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-13 07:56:20,021 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-10-13 07:56:20,022 INFO L857 garLoopResultBuilder]: For program point L138-4(lines 138 144) no Hoare annotation was computed. [2021-10-13 07:56:20,022 INFO L853 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: (let ((.cse1 (= ULTIMATE.start_main_~i~0 (_ bv0 32))) (.cse0 (= ULTIMATE.start_main_~n~0 (_ bv5 32))) (.cse2 (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)))) (or (and .cse0 .cse1 .cse2 (not (= ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~j~0))) (and (not .cse1) .cse0 (bvsle ULTIMATE.start_main_~i~0 (_ bv5 32)) .cse2))) [2021-10-13 07:56:20,022 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-13 07:56:20,022 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 07:56:20,022 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-13 07:56:20,022 INFO L853 garLoopResultBuilder]: At program point L82(lines 76 83) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-13 07:56:20,022 INFO L857 garLoopResultBuilder]: For program point L99(line 99) no Hoare annotation was computed. [2021-10-13 07:56:20,023 INFO L857 garLoopResultBuilder]: For program point L132-2(lines 132 133) no Hoare annotation was computed. [2021-10-13 07:56:20,023 INFO L857 garLoopResultBuilder]: For program point L99-2(line 99) no Hoare annotation was computed. [2021-10-13 07:56:20,023 INFO L853 garLoopResultBuilder]: At program point L132-3(lines 132 133) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-13 07:56:20,023 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:56:20,023 INFO L857 garLoopResultBuilder]: For program point L132-4(lines 132 133) no Hoare annotation was computed. [2021-10-13 07:56:20,024 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 126) no Hoare annotation was computed. [2021-10-13 07:56:20,024 INFO L857 garLoopResultBuilder]: For program point L124-1(lines 124 126) no Hoare annotation was computed. [2021-10-13 07:56:20,024 INFO L857 garLoopResultBuilder]: For program point L149-2(lines 149 150) no Hoare annotation was computed. [2021-10-13 07:56:20,024 INFO L853 garLoopResultBuilder]: At program point L149-3(lines 149 150) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-13 07:56:20,024 INFO L857 garLoopResultBuilder]: For program point L149-4(lines 149 150) no Hoare annotation was computed. [2021-10-13 07:56:20,025 INFO L853 garLoopResultBuilder]: At program point L108(lines 85 109) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-13 07:56:20,025 INFO L857 garLoopResultBuilder]: For program point L141-2(lines 141 142) no Hoare annotation was computed. [2021-10-13 07:56:20,025 INFO L853 garLoopResultBuilder]: At program point L141-3(lines 141 142) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-13 07:56:20,025 INFO L857 garLoopResultBuilder]: For program point L141-4(lines 141 142) no Hoare annotation was computed. [2021-10-13 07:56:20,025 INFO L857 garLoopResultBuilder]: For program point L125-2(lines 125 126) no Hoare annotation was computed. [2021-10-13 07:56:20,026 INFO L853 garLoopResultBuilder]: At program point L125-3(lines 125 126) the Hoare annotation is: (= ULTIMATE.start_main_~n~0 (_ bv5 32)) [2021-10-13 07:56:20,026 INFO L857 garLoopResultBuilder]: For program point L117(line 117) no Hoare annotation was computed. [2021-10-13 07:56:20,031 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:56:20,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:56:20 BoogieIcfgContainer [2021-10-13 07:56:20,055 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:56:20,056 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:56:20,056 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:56:20,056 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:56:20,057 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:55:32" (3/4) ... [2021-10-13 07:56:20,060 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:56:20,079 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-13 07:56:20,081 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-13 07:56:20,081 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:56:20,082 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:56:20,148 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:56:20,148 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:56:20,154 INFO L168 Benchmark]: Toolchain (without parser) took 64614.67 ms. Allocated memory was 71.3 MB in the beginning and 90.2 MB in the end (delta: 18.9 MB). Free memory was 53.7 MB in the beginning and 45.3 MB in the end (delta: 8.4 MB). Peak memory consumption was 26.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:56:20,154 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 71.3 MB. Free memory is still 53.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:56:20,154 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.46 ms. Allocated memory is still 71.3 MB. Free memory was 53.4 MB in the beginning and 55.0 MB in the end (delta: -1.6 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:56:20,155 INFO L168 Benchmark]: Boogie Procedure Inliner took 89.13 ms. Allocated memory is still 71.3 MB. Free memory was 55.0 MB in the beginning and 52.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:56:20,155 INFO L168 Benchmark]: Boogie Preprocessor took 86.08 ms. Allocated memory is still 71.3 MB. Free memory was 52.7 MB in the beginning and 50.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:56:20,156 INFO L168 Benchmark]: RCFGBuilder took 16449.88 ms. Allocated memory was 71.3 MB in the beginning and 90.2 MB in the end (delta: 18.9 MB). Free memory was 50.4 MB in the beginning and 69.6 MB in the end (delta: -19.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:56:20,156 INFO L168 Benchmark]: TraceAbstraction took 47530.67 ms. Allocated memory is still 90.2 MB. Free memory was 69.3 MB in the beginning and 50.1 MB in the end (delta: 19.2 MB). Peak memory consumption was 48.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:56:20,156 INFO L168 Benchmark]: Witness Printer took 96.32 ms. Allocated memory is still 90.2 MB. Free memory was 50.1 MB in the beginning and 45.3 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:56:20,159 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 71.3 MB. Free memory is still 53.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 355.46 ms. Allocated memory is still 71.3 MB. Free memory was 53.4 MB in the beginning and 55.0 MB in the end (delta: -1.6 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 89.13 ms. Allocated memory is still 71.3 MB. Free memory was 55.0 MB in the beginning and 52.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 86.08 ms. Allocated memory is still 71.3 MB. Free memory was 52.7 MB in the beginning and 50.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 16449.88 ms. Allocated memory was 71.3 MB in the beginning and 90.2 MB in the end (delta: 18.9 MB). Free memory was 50.4 MB in the beginning and 69.6 MB in the end (delta: -19.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 47530.67 ms. Allocated memory is still 90.2 MB. Free memory was 69.3 MB in the beginning and 50.1 MB in the end (delta: 19.2 MB). Peak memory consumption was 48.2 MB. Max. memory is 16.1 GB. * Witness Printer took 96.32 ms. Allocated memory is still 90.2 MB. Free memory was 50.1 MB in the beginning and 45.3 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.2 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: 7]: 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, 50 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 47434.0ms, OverallIterations: 5, TraceHistogramMax: 18, EmptinessCheckTime: 23.8ms, AutomataDifference: 23067.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 998.3ms, InitialAbstractionConstructionTime: 13.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 84 SDtfs, 538 SDslu, 244 SDs, 0 SdLazy, 487 SolverSat, 141 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16476.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1024 GetRequests, 930 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 7687.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=4, InterpolantAutomatonStates: 74, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 77.4ms AutomataMinimizationTime, 5 MinimizatonAttempts, 63 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 15 LocationsWithAnnotation, 15 PreInvPairs, 87 NumberOfFragments, 101 HoareAnnotationTreeSize, 15 FomulaSimplifications, 2485 FormulaSimplificationTreeSizeReduction, 210.2ms HoareSimplificationTime, 15 FomulaSimplificationsInter, 38 FormulaSimplificationTreeSizeReductionInter, 781.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 214.3ms SsaConstructionTime, 3224.9ms SatisfiabilityAnalysisTime, 15277.4ms InterpolantComputationTime, 499 NumberOfCodeBlocks, 247 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 972 ConstructedInterpolants, 0 QuantifiedInterpolants, 2811 SizeOfPredicates, 33 NumberOfNonLiveVariables, 887 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 26 InterpolantComputations, 4 PerfectInterpolantSequences, 2724/4704 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 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: (((n == 5bv32 && i == 0bv32) && cond == 1bv32) && !(i == j)) || (((!(i == 0bv32) && n == 5bv32) && ~bvsle32(i, 5bv32)) && cond == 1bv32) - InvariantResult [Line: 93]: Loop Invariant Derived loop invariant: ((n == 5bv32 && cond == 1bv32) && ~bvslt32(i, 50bv32)) || (n == 5bv32 && i == 0bv32) - InvariantResult [Line: 129]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 118]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 85]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 125]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 76]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 149]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 111]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 146]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 96]: Loop Invariant Derived loop invariant: ((n == 5bv32 && ~bvsle32(i, 5bv32)) && cond == 1bv32) || (n == 5bv32 && i == 0bv32) - InvariantResult [Line: 138]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 132]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 141]: Loop Invariant Derived loop invariant: n == 5bv32 - InvariantResult [Line: 121]: Loop Invariant Derived loop invariant: n == 5bv32 RESULT: Ultimate proved your program to be correct! [2021-10-13 07:56:20,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0719bcbc-2432-45e9-b0dd-c44aee4fe93c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...