./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum04-2.i --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_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/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_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum04-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/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_349c8660-cb81-4eea-bfc9-e3fa345153ee/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 e4783c6ee2901b631023e80ae57ac531c222bf81 ........................................................................................................................................................................................................................................................................................................................................................ 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_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/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_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum04-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/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_349c8660-cb81-4eea-bfc9-e3fa345153ee/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 e4783c6ee2901b631023e80ae57ac531c222bf81 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:22:16,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:22:16,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:22:16,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:22:16,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:22:16,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:22:16,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:22:16,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:22:16,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:22:16,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:22:16,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:22:16,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:22:16,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:22:16,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:22:16,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:22:16,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:22:16,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:22:16,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:22:16,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:22:16,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:22:16,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:22:16,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:22:16,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:22:16,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:22:16,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:22:16,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:22:16,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:22:16,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:22:16,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:22:16,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:22:16,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:22:16,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:22:16,860 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:22:16,861 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:22:16,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:22:16,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:22:16,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:22:16,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:22:16,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:22:16,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:22:16,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:22:16,870 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:22:16,903 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:22:16,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:22:16,904 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:22:16,904 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:22:16,905 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:22:16,905 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:22:16,905 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:22:16,905 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:22:16,906 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:22:16,906 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:22:16,906 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:22:16,906 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:22:16,907 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:22:16,907 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:22:16,907 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:22:16,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:22:16,927 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:22:16,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:22:16,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:22:16,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:22:16,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:22:16,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:22:16,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:22:16,929 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:22:16,929 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:22:16,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:22:16,930 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:22:16,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:22:16,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:22:16,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:22:16,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:22:16,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:22:16,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:22:16,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:22:16,933 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:22:16,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:22:16,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:22:16,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:22:16,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:22:16,934 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_349c8660-cb81-4eea-bfc9-e3fa345153ee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4783c6ee2901b631023e80ae57ac531c222bf81 [2021-10-13 07:22:17,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:22:17,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:22:17,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:22:17,291 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:22:17,292 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:22:17,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loops/sum04-2.i [2021-10-13 07:22:17,380 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/data/1b8f65a59/bf0198124fe4423a98a6c1ab375a6fea/FLAG3b640e169 [2021-10-13 07:22:17,905 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:22:17,906 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/sv-benchmarks/c/loops/sum04-2.i [2021-10-13 07:22:17,912 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/data/1b8f65a59/bf0198124fe4423a98a6c1ab375a6fea/FLAG3b640e169 [2021-10-13 07:22:18,288 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/data/1b8f65a59/bf0198124fe4423a98a6c1ab375a6fea [2021-10-13 07:22:18,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:22:18,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:22:18,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:22:18,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:22:18,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:22:18,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:22:18" (1/1) ... [2021-10-13 07:22:18,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e0d71ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:18, skipping insertion in model container [2021-10-13 07:22:18,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:22:18" (1/1) ... [2021-10-13 07:22:18,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:22:18,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:22:18,542 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_349c8660-cb81-4eea-bfc9-e3fa345153ee/sv-benchmarks/c/loops/sum04-2.i[808,821] [2021-10-13 07:22:18,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:22:18,563 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:22:18,578 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_349c8660-cb81-4eea-bfc9-e3fa345153ee/sv-benchmarks/c/loops/sum04-2.i[808,821] [2021-10-13 07:22:18,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:22:18,597 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:22:18,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:18 WrapperNode [2021-10-13 07:22:18,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:22:18,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:22:18,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:22:18,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:22:18,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:18" (1/1) ... [2021-10-13 07:22:18,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:18" (1/1) ... [2021-10-13 07:22:18,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:22:18,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:22:18,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:22:18,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:22:18,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:18" (1/1) ... [2021-10-13 07:22:18,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:18" (1/1) ... [2021-10-13 07:22:18,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:18" (1/1) ... [2021-10-13 07:22:18,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:18" (1/1) ... [2021-10-13 07:22:18,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:18" (1/1) ... [2021-10-13 07:22:18,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:18" (1/1) ... [2021-10-13 07:22:18,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:18" (1/1) ... [2021-10-13 07:22:18,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:22:18,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:22:18,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:22:18,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:22:18,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:18" (1/1) ... [2021-10-13 07:22:18,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:22:18,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:22:18,699 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:22:18,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:22:18,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:22:18,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:22:18,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:22:18,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:22:19,064 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:22:19,066 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 07:22:19,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:22:19 BoogieIcfgContainer [2021-10-13 07:22:19,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:22:19,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:22:19,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:22:19,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:22:19,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:22:18" (1/3) ... [2021-10-13 07:22:19,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3954f7b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:22:19, skipping insertion in model container [2021-10-13 07:22:19,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:18" (2/3) ... [2021-10-13 07:22:19,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3954f7b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:22:19, skipping insertion in model container [2021-10-13 07:22:19,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:22:19" (3/3) ... [2021-10-13 07:22:19,086 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2021-10-13 07:22:19,092 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:22:19,092 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:22:19,184 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:22:19,193 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 07:22:19,193 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:22:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 07:22:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:22:19,215 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:19,216 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:22:19,216 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:22:19,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:19,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1880326, now seen corresponding path program 1 times [2021-10-13 07:22:19,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:22:19,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894985656] [2021-10-13 07:22:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:19,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:22:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:19,408 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 07:22:19,409 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:22:19,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894985656] [2021-10-13 07:22:19,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894985656] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:22:19,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:22:19,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:22:19,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315079746] [2021-10-13 07:22:19,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:22:19,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:22:19,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:22:19,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:22:19,438 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 07:22:19,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:19,462 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-10-13 07:22:19,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:22:19,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-10-13 07:22:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:19,473 INFO L225 Difference]: With dead ends: 13 [2021-10-13 07:22:19,473 INFO L226 Difference]: Without dead ends: 6 [2021-10-13 07:22:19,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:22:19,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-10-13 07:22:19,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-13 07:22:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 07:22:19,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-10-13 07:22:19,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-10-13 07:22:19,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:19,513 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-10-13 07:22:19,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 07:22:19,513 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-10-13 07:22:19,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:22:19,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:19,514 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:22:19,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:22:19,515 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:22:19,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:19,516 INFO L82 PathProgramCache]: Analyzing trace with hash 58185316, now seen corresponding path program 1 times [2021-10-13 07:22:19,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:22:19,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808749399] [2021-10-13 07:22:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:19,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:22:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:19,573 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:22:19,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808749399] [2021-10-13 07:22:19,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808749399] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:22:19,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068005654] [2021-10-13 07:22:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:19,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:22:19,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:22:19,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:22:19,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:22:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:19,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:22:19,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:19,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:19,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068005654] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:19,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2074506828] [2021-10-13 07:22:19,806 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-13 07:22:19,807 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:22:19,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:22:19,820 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:22:19,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:22:19,860 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:22:19,866 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:22:19,867 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:22:19,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 07:22:19,872 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:22:19,874 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:22:19,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:22:19,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-13 07:22:19,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:22:19,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:22:19,958 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:22:19,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:22:19,960 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:22:19,964 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:22:19,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:22:19,967 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:22:19,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:22:19,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:22:20,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:22:20,006 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:22:20,010 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-10-13 07:22:20,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:22:20,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:92, output treesize:80 [2021-10-13 07:22:20,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:20,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:22:20,240 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_8| 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 07:22:20,245 INFO L168 Benchmark]: Toolchain (without parser) took 1951.71 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 75.7 MB in the beginning and 85.5 MB in the end (delta: -9.8 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:22:20,246 INFO L168 Benchmark]: CDTParser took 1.08 ms. Allocated memory is still 96.5 MB. Free memory is still 70.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:22:20,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.46 ms. Allocated memory is still 96.5 MB. Free memory was 75.7 MB in the beginning and 72.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:22:20,247 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.06 ms. Allocated memory is still 96.5 MB. Free memory was 72.7 MB in the beginning and 71.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:22:20,248 INFO L168 Benchmark]: Boogie Preprocessor took 22.65 ms. Allocated memory is still 96.5 MB. Free memory was 71.4 MB in the beginning and 70.4 MB in the end (delta: 950.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:22:20,249 INFO L168 Benchmark]: RCFGBuilder took 408.24 ms. Allocated memory is still 96.5 MB. Free memory was 70.1 MB in the beginning and 60.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:22:20,250 INFO L168 Benchmark]: TraceAbstraction took 1172.13 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 60.0 MB in the beginning and 85.5 MB in the end (delta: -25.6 MB). Peak memory consumption was 2.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:22:20,255 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.08 ms. Allocated memory is still 96.5 MB. Free memory is still 70.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 303.46 ms. Allocated memory is still 96.5 MB. Free memory was 75.7 MB in the beginning and 72.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.06 ms. Allocated memory is still 96.5 MB. Free memory was 72.7 MB in the beginning and 71.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.65 ms. Allocated memory is still 96.5 MB. Free memory was 71.4 MB in the beginning and 70.4 MB in the end (delta: 950.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 408.24 ms. Allocated memory is still 96.5 MB. Free memory was 70.1 MB in the beginning and 60.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1172.13 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 60.0 MB in the beginning and 85.5 MB in the end (delta: -25.6 MB). Peak memory consumption was 2.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_8| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_8|: 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 07:22:20,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/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 07:22:23,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:22:23,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:22:23,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:22:23,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:22:23,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:22:23,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:22:23,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:22:23,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:22:23,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:22:23,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:22:23,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:22:23,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:22:23,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:22:23,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:22:23,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:22:23,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:22:23,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:22:23,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:22:23,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:22:23,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:22:23,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:22:23,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:22:23,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:22:23,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:22:23,414 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:22:23,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:22:23,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:22:23,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:22:23,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:22:23,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:22:23,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:22:23,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:22:23,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:22:23,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:22:23,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:22:23,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:22:23,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:22:23,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:22:23,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:22:23,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:22:23,433 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:22:23,483 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:22:23,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:22:23,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:22:23,485 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:22:23,485 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:22:23,485 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:22:23,485 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:22:23,486 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:22:23,486 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:22:23,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:22:23,489 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:22:23,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:22:23,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:22:23,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:22:23,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:22:23,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:22:23,490 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:22:23,490 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:22:23,490 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:22:23,491 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:22:23,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:22:23,491 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:22:23,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:22:23,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:22:23,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:22:23,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:22:23,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:22:23,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:22:23,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:22:23,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:22:23,493 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:22:23,494 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:22:23,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:22:23,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:22:23,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:22:23,495 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_349c8660-cb81-4eea-bfc9-e3fa345153ee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4783c6ee2901b631023e80ae57ac531c222bf81 [2021-10-13 07:22:23,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:22:23,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:22:23,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:22:23,956 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:22:23,957 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:22:23,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loops/sum04-2.i [2021-10-13 07:22:24,049 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/data/cb32e7993/69bbadb31d0e48b8be5f3bb592f74ab2/FLAG1f0558b40 [2021-10-13 07:22:24,718 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:22:24,719 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/sv-benchmarks/c/loops/sum04-2.i [2021-10-13 07:22:24,727 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/data/cb32e7993/69bbadb31d0e48b8be5f3bb592f74ab2/FLAG1f0558b40 [2021-10-13 07:22:25,052 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/data/cb32e7993/69bbadb31d0e48b8be5f3bb592f74ab2 [2021-10-13 07:22:25,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:22:25,065 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:22:25,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:22:25,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:22:25,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:22:25,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:22:25" (1/1) ... [2021-10-13 07:22:25,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41315e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:25, skipping insertion in model container [2021-10-13 07:22:25,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:22:25" (1/1) ... [2021-10-13 07:22:25,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:22:25,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:22:25,336 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_349c8660-cb81-4eea-bfc9-e3fa345153ee/sv-benchmarks/c/loops/sum04-2.i[808,821] [2021-10-13 07:22:25,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:22:25,372 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:22:25,388 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_349c8660-cb81-4eea-bfc9-e3fa345153ee/sv-benchmarks/c/loops/sum04-2.i[808,821] [2021-10-13 07:22:25,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:22:25,424 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:22:25,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:25 WrapperNode [2021-10-13 07:22:25,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:22:25,430 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:22:25,430 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:22:25,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:22:25,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:25" (1/1) ... [2021-10-13 07:22:25,474 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:25" (1/1) ... [2021-10-13 07:22:25,493 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:22:25,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:22:25,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:22:25,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:22:25,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:25" (1/1) ... [2021-10-13 07:22:25,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:25" (1/1) ... [2021-10-13 07:22:25,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:25" (1/1) ... [2021-10-13 07:22:25,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:25" (1/1) ... [2021-10-13 07:22:25,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:25" (1/1) ... [2021-10-13 07:22:25,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:25" (1/1) ... [2021-10-13 07:22:25,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:25" (1/1) ... [2021-10-13 07:22:25,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:22:25,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:22:25,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:22:25,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:22:25,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:25" (1/1) ... [2021-10-13 07:22:25,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:22:25,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:22:25,563 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:22:25,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:22:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:22:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:22:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:22:25,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:22:25,829 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:22:25,830 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 07:22:25,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:22:25 BoogieIcfgContainer [2021-10-13 07:22:25,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:22:25,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:22:25,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:22:25,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:22:25,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:22:25" (1/3) ... [2021-10-13 07:22:25,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d53fe7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:22:25, skipping insertion in model container [2021-10-13 07:22:25,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:22:25" (2/3) ... [2021-10-13 07:22:25,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d53fe7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:22:25, skipping insertion in model container [2021-10-13 07:22:25,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:22:25" (3/3) ... [2021-10-13 07:22:25,841 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2021-10-13 07:22:25,847 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:22:25,848 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:22:25,953 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:22:25,977 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 07:22:25,978 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:22:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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 07:22:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:22:25,998 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:25,999 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:22:25,999 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:22:26,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:26,006 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2021-10-13 07:22:26,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:22:26,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821462172] [2021-10-13 07:22:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:26,022 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:22:26,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:22:26,027 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:22:26,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:22:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:26,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:22:26,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:26,192 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 07:22:26,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:26,228 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 07:22:26,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:22:26,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821462172] [2021-10-13 07:22:26,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821462172] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:22:26,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:22:26,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:22:26,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270513414] [2021-10-13 07:22:26,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:22:26,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:22:26,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:22:26,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:22:26,268 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 07:22:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:26,306 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2021-10-13 07:22:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:22:26,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 07:22:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:26,317 INFO L225 Difference]: With dead ends: 21 [2021-10-13 07:22:26,317 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 07:22:26,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:22:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 07:22:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-13 07:22:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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 07:22:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-13 07:22:26,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2021-10-13 07:22:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:26,356 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-13 07:22:26,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 07:22:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-13 07:22:26,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:22:26,357 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:26,358 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 07:22:26,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:26,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:22:26,572 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:22:26,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:26,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 1 times [2021-10-13 07:22:26,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:22:26,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072166300] [2021-10-13 07:22:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:26,575 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:22:26,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:22:26,577 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:22:26,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:22:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:26,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:22:26,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:26,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:26,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:22:26,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072166300] [2021-10-13 07:22:26,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072166300] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:26,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [321655948] [2021-10-13 07:22:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:26,852 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:22:26,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:22:26,855 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:22:26,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-10-13 07:22:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:26,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:22:26,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:27,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:27,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [321655948] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:27,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870768226] [2021-10-13 07:22:27,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:27,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:22:27,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:22:27,118 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:22:27,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 07:22:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:27,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:22:27,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:27,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:27,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870768226] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:27,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:22:27,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 10 [2021-10-13 07:22:27,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718643806] [2021-10-13 07:22:27,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:22:27,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:22:27,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:22:27,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:22:27,501 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 07:22:27,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:27,718 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-10-13 07:22:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:22:27,721 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 10 [2021-10-13 07:22:27,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:27,722 INFO L225 Difference]: With dead ends: 23 [2021-10-13 07:22:27,722 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 07:22:27,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:22:27,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 07:22:27,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-13 07:22:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 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 07:22:27,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-10-13 07:22:27,733 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2021-10-13 07:22:27,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:27,734 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-10-13 07:22:27,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 07:22:27,734 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-10-13 07:22:27,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:22:27,737 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:27,738 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-10-13 07:22:27,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:27,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-10-13 07:22:28,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:28,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:22:28,354 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:22:28,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:28,355 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 2 times [2021-10-13 07:22:28,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:22:28,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666041588] [2021-10-13 07:22:28,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:22:28,357 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:22:28,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:22:28,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:22:28,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:22:28,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:22:28,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:22:28,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:22:28,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:28,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:28,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:22:28,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666041588] [2021-10-13 07:22:28,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666041588] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:28,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1992327583] [2021-10-13 07:22:28,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:22:28,977 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:22:28,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:22:28,981 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:22:29,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 07:22:29,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:22:29,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:22:29,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:22:29,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:29,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:29,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1992327583] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:29,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696574847] [2021-10-13 07:22:29,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:22:29,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:22:29,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:22:29,369 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:22:29,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 07:22:29,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:22:29,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:22:29,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:22:29,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:29,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:30,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696574847] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:30,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:22:30,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 10] total 22 [2021-10-13 07:22:30,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898520689] [2021-10-13 07:22:30,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 07:22:30,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:22:30,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 07:22:30,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-10-13 07:22:30,130 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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 07:22:31,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:31,106 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-13 07:22:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 07:22:31,107 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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 18 [2021-10-13 07:22:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:31,108 INFO L225 Difference]: With dead ends: 39 [2021-10-13 07:22:31,109 INFO L226 Difference]: Without dead ends: 35 [2021-10-13 07:22:31,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1317.1ms TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2021-10-13 07:22:31,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-13 07:22:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-10-13 07:22:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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 07:22:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-10-13 07:22:31,124 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 18 [2021-10-13 07:22:31,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:31,124 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-10-13 07:22:31,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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 07:22:31,125 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-10-13 07:22:31,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:22:31,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:31,127 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2021-10-13 07:22:31,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:31,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:31,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:31,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:22:31,749 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:22:31,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:31,749 INFO L82 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 3 times [2021-10-13 07:22:31,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:22:31,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198760934] [2021-10-13 07:22:31,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:22:31,751 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:22:31,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:22:31,762 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:22:31,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:22:31,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-13 07:22:31,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:22:31,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:22:31,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:32,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:32,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:22:32,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198760934] [2021-10-13 07:22:32,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198760934] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:32,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1430277531] [2021-10-13 07:22:32,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:22:32,563 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:22:32,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:22:32,565 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:22:32,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 07:22:32,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-13 07:22:32,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:22:32,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:22:32,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:32,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:33,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1430277531] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:33,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751605615] [2021-10-13 07:22:33,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:22:33,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:22:33,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:22:33,073 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:22:33,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 07:22:33,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-13 07:22:33,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:22:33,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:22:33,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:33,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:33,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751605615] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:33,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:22:33,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 22 [2021-10-13 07:22:33,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033634457] [2021-10-13 07:22:33,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 07:22:33,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:22:33,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 07:22:33,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-10-13 07:22:33,577 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 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 07:22:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:33,765 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-10-13 07:22:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 07:22:33,767 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 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 22 [2021-10-13 07:22:33,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:33,768 INFO L225 Difference]: With dead ends: 39 [2021-10-13 07:22:33,769 INFO L226 Difference]: Without dead ends: 35 [2021-10-13 07:22:33,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 324.9ms TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-10-13 07:22:33,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-13 07:22:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-10-13 07:22:33,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 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 07:22:33,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-10-13 07:22:33,787 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 22 [2021-10-13 07:22:33,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:33,788 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-10-13 07:22:33,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 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 07:22:33,788 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-10-13 07:22:33,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 07:22:33,790 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:33,791 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-10-13 07:22:33,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:34,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-10-13 07:22:34,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:34,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:22:34,394 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:22:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:34,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 4 times [2021-10-13 07:22:34,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:22:34,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440092365] [2021-10-13 07:22:34,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 07:22:34,396 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:22:34,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:22:34,397 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:22:34,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:22:34,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 07:22:34,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:22:34,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:22:34,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 102 proven. 64 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 07:22:34,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 102 proven. 64 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 07:22:35,163 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:22:35,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440092365] [2021-10-13 07:22:35,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440092365] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:35,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1281914534] [2021-10-13 07:22:35,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 07:22:35,164 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:22:35,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:22:35,165 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:22:35,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 07:22:35,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 07:22:35,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:22:35,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:22:35,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 102 proven. 64 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 07:22:35,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 102 proven. 64 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 07:22:35,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1281914534] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:35,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288128498] [2021-10-13 07:22:35,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 07:22:35,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:22:35,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:22:35,683 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:22:35,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 07:22:35,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 07:22:35,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:22:35,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:22:35,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 27 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:36,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:37,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288128498] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:37,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:22:37,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 16, 18] total 41 [2021-10-13 07:22:37,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131986594] [2021-10-13 07:22:37,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-13 07:22:37,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:22:37,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-13 07:22:37,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1177, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 07:22:37,868 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 41 states have internal predecessors, (84), 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 07:22:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:38,028 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-10-13 07:22:38,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:22:38,030 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 41 states have internal predecessors, (84), 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 34 [2021-10-13 07:22:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:38,031 INFO L225 Difference]: With dead ends: 35 [2021-10-13 07:22:38,031 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:22:38,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1680.5ms TimeCoverageRelationStatistics Valid=463, Invalid=1177, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 07:22:38,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:22:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:22:38,036 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 07:22:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:22:38,036 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2021-10-13 07:22:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:38,042 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:22:38,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 41 states have internal predecessors, (84), 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 07:22:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:22:38,043 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:22:38,047 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:22:38,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:38,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:38,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:38,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:22:38,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:22:38,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:22:38,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:22:39,022 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:22:39,023 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-10-13 07:22:39,023 INFO L860 garLoopResultBuilder]: At program point L15-2(lines 1 28) the Hoare annotation is: true [2021-10-13 07:22:39,023 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 07:22:39,023 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:22:39,023 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 07:22:39,024 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-10-13 07:22:39,024 INFO L857 garLoopResultBuilder]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2021-10-13 07:22:39,024 INFO L853 garLoopResultBuilder]: At program point L24-3(lines 24 26) the Hoare annotation is: (or (and (= (_ bv8 32) ULTIMATE.start_main_~i~0) (= (_ bv14 32) ULTIMATE.start_main_~sn~0)) (and (= ULTIMATE.start_main_~sn~0 (_ bv12 32)) (= ULTIMATE.start_main_~i~0 (_ bv7 32))) (and (= ULTIMATE.start_main_~sn~0 (_ bv10 32)) (= (_ bv6 32) ULTIMATE.start_main_~i~0)) (and (= (_ bv2 32) ULTIMATE.start_main_~i~0) (= (_ bv2 32) ULTIMATE.start_main_~sn~0)) (and (= (_ bv8 32) ULTIMATE.start_main_~sn~0) (= ULTIMATE.start_main_~i~0 (_ bv5 32))) (and (= (_ bv3 32) ULTIMATE.start_main_~i~0) (= (_ bv4 32) ULTIMATE.start_main_~sn~0)) (and (= (_ bv4 32) ULTIMATE.start_main_~i~0) (= (_ bv6 32) ULTIMATE.start_main_~sn~0)) (and (= ULTIMATE.start_main_~i~0 (_ bv1 32)) (= ULTIMATE.start_main_~sn~0 (_ bv0 32))) (and (= (_ bv16 32) ULTIMATE.start_main_~sn~0) (= ULTIMATE.start_main_~i~0 (_ bv9 32)))) [2021-10-13 07:22:39,024 INFO L857 garLoopResultBuilder]: For program point L24-4(lines 24 26) no Hoare annotation was computed. [2021-10-13 07:22:39,025 INFO L857 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-10-13 07:22:39,030 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:22:39,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:22:39 BoogieIcfgContainer [2021-10-13 07:22:39,047 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:22:39,048 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:22:39,048 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:22:39,048 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:22:39,049 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:22:25" (3/4) ... [2021-10-13 07:22:39,052 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:22:39,063 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-13 07:22:39,064 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 07:22:39,064 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:22:39,064 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:22:39,099 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:22:39,100 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:22:39,102 INFO L168 Benchmark]: Toolchain (without parser) took 14035.58 ms. Allocated memory was 73.4 MB in the beginning and 113.2 MB in the end (delta: 39.8 MB). Free memory was 55.3 MB in the beginning and 76.2 MB in the end (delta: -20.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:22:39,102 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 73.4 MB. Free memory was 53.5 MB in the beginning and 53.4 MB in the end (delta: 54.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:22:39,103 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.74 ms. Allocated memory is still 73.4 MB. Free memory was 55.2 MB in the beginning and 57.0 MB in the end (delta: -1.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:22:39,103 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.45 ms. Allocated memory is still 73.4 MB. Free memory was 57.0 MB in the beginning and 55.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:22:39,104 INFO L168 Benchmark]: Boogie Preprocessor took 26.25 ms. Allocated memory is still 73.4 MB. Free memory was 55.4 MB in the beginning and 54.4 MB in the end (delta: 988.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:22:39,104 INFO L168 Benchmark]: RCFGBuilder took 310.62 ms. Allocated memory is still 73.4 MB. Free memory was 54.4 MB in the beginning and 45.5 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:22:39,105 INFO L168 Benchmark]: TraceAbstraction took 13213.22 ms. Allocated memory was 73.4 MB in the beginning and 113.2 MB in the end (delta: 39.8 MB). Free memory was 45.0 MB in the beginning and 78.3 MB in the end (delta: -33.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:22:39,105 INFO L168 Benchmark]: Witness Printer took 52.29 ms. Allocated memory is still 113.2 MB. Free memory was 78.3 MB in the beginning and 76.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:22:39,108 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 73.4 MB. Free memory was 53.5 MB in the beginning and 53.4 MB in the end (delta: 54.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 356.74 ms. Allocated memory is still 73.4 MB. Free memory was 55.2 MB in the beginning and 57.0 MB in the end (delta: -1.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.45 ms. Allocated memory is still 73.4 MB. Free memory was 57.0 MB in the beginning and 55.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.25 ms. Allocated memory is still 73.4 MB. Free memory was 55.4 MB in the beginning and 54.4 MB in the end (delta: 988.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 310.62 ms. Allocated memory is still 73.4 MB. Free memory was 54.4 MB in the beginning and 45.5 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13213.22 ms. Allocated memory was 73.4 MB in the beginning and 113.2 MB in the end (delta: 39.8 MB). Free memory was 45.0 MB in the beginning and 78.3 MB in the end (delta: -33.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * Witness Printer took 52.29 ms. Allocated memory is still 113.2 MB. Free memory was 78.3 MB in the beginning and 76.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 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: 16]: 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, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13079.0ms, OverallIterations: 5, TraceHistogramMax: 14, EmptinessCheckTime: 18.2ms, AutomataDifference: 1646.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 373.0ms, InitialAbstractionConstructionTime: 10.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 35 SDtfs, 84 SDslu, 268 SDs, 0 SdLazy, 431 SolverSat, 75 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 454.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 502 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 3584.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 60.9ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 12 NumberOfFragments, 65 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 144.3ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 143 FormulaSimplificationTreeSizeReductionInter, 222.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 125.2ms SsaConstructionTime, 458.9ms SatisfiabilityAnalysisTime, 6221.1ms InterpolantComputationTime, 258 NumberOfCodeBlocks, 258 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 490 ConstructedInterpolants, 0 QuantifiedInterpolants, 2026 SizeOfPredicates, 16 NumberOfNonLiveVariables, 582 ConjunctsInSsa, 114 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 555/1800 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: 24]: Loop Invariant Derived loop invariant: ((((((((8bv32 == i && 14bv32 == sn) || (sn == 12bv32 && i == 7bv32)) || (sn == 10bv32 && 6bv32 == i)) || (2bv32 == i && 2bv32 == sn)) || (8bv32 == sn && i == 5bv32)) || (3bv32 == i && 4bv32 == sn)) || (4bv32 == i && 6bv32 == sn)) || (i == 1bv32 && sn == 0bv32)) || (16bv32 == sn && i == 9bv32) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-13 07:22:39,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349c8660-cb81-4eea-bfc9-e3fa345153ee/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...