./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/ludcmp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/ludcmp.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan --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 f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/ludcmp.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan --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 f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 06:02:11,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 06:02:11,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 06:02:11,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 06:02:11,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 06:02:11,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 06:02:11,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 06:02:11,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 06:02:11,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 06:02:11,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 06:02:11,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 06:02:11,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 06:02:11,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 06:02:11,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 06:02:11,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 06:02:11,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 06:02:11,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 06:02:11,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 06:02:11,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 06:02:11,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 06:02:11,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 06:02:11,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 06:02:11,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 06:02:11,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 06:02:11,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 06:02:11,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 06:02:11,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 06:02:11,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 06:02:11,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 06:02:11,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 06:02:11,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 06:02:11,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 06:02:11,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 06:02:11,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 06:02:11,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 06:02:11,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 06:02:11,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 06:02:11,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 06:02:11,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 06:02:11,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 06:02:11,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 06:02:11,922 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 06:02:11,937 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 06:02:11,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 06:02:11,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 06:02:11,938 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 06:02:11,938 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 06:02:11,939 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 06:02:11,939 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 06:02:11,939 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 06:02:11,939 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 06:02:11,939 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 06:02:11,939 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 06:02:11,939 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 06:02:11,939 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 06:02:11,939 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 06:02:11,940 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 06:02:11,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 06:02:11,940 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 06:02:11,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 06:02:11,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 06:02:11,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 06:02:11,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 06:02:11,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 06:02:11,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 06:02:11,941 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 06:02:11,941 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 06:02:11,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 06:02:11,941 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 06:02:11,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 06:02:11,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 06:02:11,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 06:02:11,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:02:11,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 06:02:11,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 06:02:11,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 06:02:11,942 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 06:02:11,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 06:02:11,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 06:02:11,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 06:02:11,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 06:02:11,943 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-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 [2020-12-09 06:02:12,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 06:02:12,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 06:02:12,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 06:02:12,162 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 06:02:12,163 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 06:02:12,163 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/../../sv-benchmarks/c/loops/ludcmp.c [2020-12-09 06:02:12,204 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/data/490708a9e/d4efb6711c6144588233a6a3c3cd1fdb/FLAG128243c10 [2020-12-09 06:02:12,558 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 06:02:12,558 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/sv-benchmarks/c/loops/ludcmp.c [2020-12-09 06:02:12,564 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/data/490708a9e/d4efb6711c6144588233a6a3c3cd1fdb/FLAG128243c10 [2020-12-09 06:02:12,573 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/data/490708a9e/d4efb6711c6144588233a6a3c3cd1fdb [2020-12-09 06:02:12,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 06:02:12,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 06:02:12,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 06:02:12,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 06:02:12,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 06:02:12,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:02:12" (1/1) ... [2020-12-09 06:02:12,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a69e1d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:12, skipping insertion in model container [2020-12-09 06:02:12,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:02:12" (1/1) ... [2020-12-09 06:02:12,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 06:02:12,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 06:02:12,700 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/sv-benchmarks/c/loops/ludcmp.c[318,331] [2020-12-09 06:02:12,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:02:12,735 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 06:02:12,743 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/sv-benchmarks/c/loops/ludcmp.c[318,331] [2020-12-09 06:02:12,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:02:12,769 INFO L208 MainTranslator]: Completed translation [2020-12-09 06:02:12,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:12 WrapperNode [2020-12-09 06:02:12,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 06:02:12,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 06:02:12,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 06:02:12,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 06:02:12,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:12" (1/1) ... [2020-12-09 06:02:12,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:12" (1/1) ... [2020-12-09 06:02:12,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 06:02:12,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 06:02:12,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 06:02:12,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 06:02:12,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:12" (1/1) ... [2020-12-09 06:02:12,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:12" (1/1) ... [2020-12-09 06:02:12,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:12" (1/1) ... [2020-12-09 06:02:12,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:12" (1/1) ... [2020-12-09 06:02:12,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:12" (1/1) ... [2020-12-09 06:02:12,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:12" (1/1) ... [2020-12-09 06:02:12,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:12" (1/1) ... [2020-12-09 06:02:12,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 06:02:12,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 06:02:12,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 06:02:12,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 06:02:12,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:02:12,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 06:02:12,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 06:02:12,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-09 06:02:12,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-09 06:02:12,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 06:02:12,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 06:02:12,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 06:02:13,383 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 06:02:13,383 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-09 06:02:13,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:02:13 BoogieIcfgContainer [2020-12-09 06:02:13,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 06:02:13,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 06:02:13,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 06:02:13,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 06:02:13,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:02:12" (1/3) ... [2020-12-09 06:02:13,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa04e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:02:13, skipping insertion in model container [2020-12-09 06:02:13,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:12" (2/3) ... [2020-12-09 06:02:13,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa04e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:02:13, skipping insertion in model container [2020-12-09 06:02:13,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:02:13" (3/3) ... [2020-12-09 06:02:13,393 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2020-12-09 06:02:13,407 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 06:02:13,411 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 06:02:13,420 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 06:02:13,439 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 06:02:13,439 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 06:02:13,439 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 06:02:13,439 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 06:02:13,439 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 06:02:13,439 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 06:02:13,439 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 06:02:13,439 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 06:02:13,450 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-09 06:02:13,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 06:02:13,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:02:13,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 06:02:13,455 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:02:13,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:02:13,460 INFO L82 PathProgramCache]: Analyzing trace with hash 224012112, now seen corresponding path program 1 times [2020-12-09 06:02:13,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:02:13,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055544515] [2020-12-09 06:02:13,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:02:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:02:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:13,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055544515] [2020-12-09 06:02:13,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:02:13,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 06:02:13,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799779673] [2020-12-09 06:02:13,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:02:13,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:02:13,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:02:13,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:02:13,622 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2020-12-09 06:02:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:02:13,659 INFO L93 Difference]: Finished difference Result 44 states and 73 transitions. [2020-12-09 06:02:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:02:13,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 06:02:13,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:02:13,667 INFO L225 Difference]: With dead ends: 44 [2020-12-09 06:02:13,667 INFO L226 Difference]: Without dead ends: 8 [2020-12-09 06:02:13,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:02:13,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-09 06:02:13,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-09 06:02:13,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-09 06:02:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-12-09 06:02:13,692 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2020-12-09 06:02:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:02:13,692 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-12-09 06:02:13,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:02:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-12-09 06:02:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 06:02:13,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:02:13,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 06:02:13,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 06:02:13,693 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:02:13,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:02:13,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1644983507, now seen corresponding path program 1 times [2020-12-09 06:02:13,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:02:13,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642395927] [2020-12-09 06:02:13,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:02:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:02:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:13,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642395927] [2020-12-09 06:02:13,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606029042] [2020-12-09 06:02:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:02:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:02:13,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 06:02:13,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:02:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:13,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:02:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:13,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1231941470] [2020-12-09 06:02:13,895 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 06:02:13,895 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:02:13,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:02:13,902 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:02:13,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:02:14,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:02:14,494 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:02:14,675 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:02:14,935 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 96 [2020-12-09 06:02:14,952 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:02:14,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:02:14,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2020-12-09 06:02:14,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710615460] [2020-12-09 06:02:14,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 06:02:14,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:02:14,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 06:02:14,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-09 06:02:14,955 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 10 states. [2020-12-09 06:02:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:02:15,008 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2020-12-09 06:02:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 06:02:15,009 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2020-12-09 06:02:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:02:15,009 INFO L225 Difference]: With dead ends: 18 [2020-12-09 06:02:15,009 INFO L226 Difference]: Without dead ends: 11 [2020-12-09 06:02:15,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-12-09 06:02:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-09 06:02:15,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-09 06:02:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 06:02:15,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-09 06:02:15,013 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2020-12-09 06:02:15,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:02:15,014 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-09 06:02:15,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 06:02:15,014 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-09 06:02:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 06:02:15,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:02:15,014 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2020-12-09 06:02:15,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 06:02:15,216 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:02:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:02:15,218 INFO L82 PathProgramCache]: Analyzing trace with hash 444774032, now seen corresponding path program 2 times [2020-12-09 06:02:15,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:02:15,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496056529] [2020-12-09 06:02:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:02:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:02:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:15,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496056529] [2020-12-09 06:02:15,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698805268] [2020-12-09 06:02:15,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:02:15,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 06:02:15,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:02:15,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 06:02:15,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:02:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:15,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:02:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:15,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1147726620] [2020-12-09 06:02:15,535 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 06:02:15,535 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:02:15,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:02:15,536 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:02:15,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:02:15,757 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:02:15,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:02:15,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:02:16,079 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:02:16,377 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 96 [2020-12-09 06:02:16,390 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:02:16,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:02:16,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2020-12-09 06:02:16,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624810345] [2020-12-09 06:02:16,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 06:02:16,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:02:16,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 06:02:16,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-09 06:02:16,391 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 15 states. [2020-12-09 06:02:16,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:02:16,440 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-12-09 06:02:16,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 06:02:16,441 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 9 [2020-12-09 06:02:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:02:16,441 INFO L225 Difference]: With dead ends: 23 [2020-12-09 06:02:16,441 INFO L226 Difference]: Without dead ends: 13 [2020-12-09 06:02:16,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-12-09 06:02:16,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-09 06:02:16,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-09 06:02:16,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 06:02:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-09 06:02:16,444 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2020-12-09 06:02:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:02:16,444 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-09 06:02:16,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 06:02:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-09 06:02:16,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 06:02:16,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:02:16,444 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2020-12-09 06:02:16,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-09 06:02:16,645 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:02:16,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:02:16,646 INFO L82 PathProgramCache]: Analyzing trace with hash -2050465232, now seen corresponding path program 3 times [2020-12-09 06:02:16,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:02:16,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515657905] [2020-12-09 06:02:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:02:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 06:02:16,698 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 06:02:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 06:02:16,730 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 06:02:16,746 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 06:02:16,746 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 06:02:16,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-12-09 06:02:16,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:02:16 BoogieIcfgContainer [2020-12-09 06:02:16,771 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 06:02:16,771 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 06:02:16,771 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 06:02:16,771 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 06:02:16,772 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:02:13" (3/4) ... [2020-12-09 06:02:16,773 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 06:02:16,774 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 06:02:16,775 INFO L168 Benchmark]: Toolchain (without parser) took 4198.23 ms. Allocated memory was 88.1 MB in the beginning and 167.8 MB in the end (delta: 79.7 MB). Free memory was 47.6 MB in the beginning and 78.3 MB in the end (delta: -30.7 MB). Peak memory consumption was 49.2 MB. Max. memory is 16.1 GB. [2020-12-09 06:02:16,775 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 88.1 MB. Free memory was 63.8 MB in the beginning and 63.7 MB in the end (delta: 115.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:02:16,775 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.68 ms. Allocated memory is still 88.1 MB. Free memory was 47.4 MB in the beginning and 58.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. [2020-12-09 06:02:16,776 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.41 ms. Allocated memory is still 88.1 MB. Free memory was 58.0 MB in the beginning and 55.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:02:16,776 INFO L168 Benchmark]: Boogie Preprocessor took 25.07 ms. Allocated memory is still 88.1 MB. Free memory was 55.8 MB in the beginning and 53.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:02:16,776 INFO L168 Benchmark]: RCFGBuilder took 555.69 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 53.7 MB in the beginning and 75.8 MB in the end (delta: -22.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. [2020-12-09 06:02:16,777 INFO L168 Benchmark]: TraceAbstraction took 3383.73 ms. Allocated memory was 115.3 MB in the beginning and 167.8 MB in the end (delta: 52.4 MB). Free memory was 75.3 MB in the beginning and 78.3 MB in the end (delta: -3.0 MB). Peak memory consumption was 49.0 MB. Max. memory is 16.1 GB. [2020-12-09 06:02:16,777 INFO L168 Benchmark]: Witness Printer took 2.61 ms. Allocated memory is still 167.8 MB. Free memory is still 78.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:02:16,779 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 88.1 MB. Free memory was 63.8 MB in the beginning and 63.7 MB in the end (delta: 115.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 192.68 ms. Allocated memory is still 88.1 MB. Free memory was 47.4 MB in the beginning and 58.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.41 ms. Allocated memory is still 88.1 MB. Free memory was 58.0 MB in the beginning and 55.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.07 ms. Allocated memory is still 88.1 MB. Free memory was 55.8 MB in the beginning and 53.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 555.69 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 53.7 MB in the beginning and 75.8 MB in the end (delta: -22.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3383.73 ms. Allocated memory was 115.3 MB in the beginning and 167.8 MB in the end (delta: 52.4 MB). Free memory was 75.3 MB in the beginning and 78.3 MB in the end (delta: -3.0 MB). Peak memory consumption was 49.0 MB. Max. memory is 16.1 GB. * Witness Printer took 2.61 ms. Allocated memory is still 167.8 MB. Free memory is still 78.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_real at line 98, overapproximation of someBinaryArithmeticDOUBLEoperation at line 99. Possible FailurePath: [L71] double a[50][50], b[50], x[50]; [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 VAL [a={10:0}, b={5:0}, x={3:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={10:0}, b={5:0}, x={3:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={5:0}, x={3:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={5:0}, x={3:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={5:0}, x={3:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={5:0}, x={3:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={5:0}, x={3:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={5:0}, x={3:0}] [L96] COND FALSE !(j <= n) [L6] COND TRUE !(cond) VAL [a={10:0}, b={5:0}, x={3:0}] [L7] reach_error() VAL [a={10:0}, b={5:0}, x={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.3s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 53 SDslu, 78 SDs, 0 SdLazy, 54 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 1093 SizeOfPredicates, 4 NumberOfNonLiveVariables, 167 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 06:02:18,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 06:02:18,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 06:02:18,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 06:02:18,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 06:02:18,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 06:02:18,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 06:02:18,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 06:02:18,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 06:02:18,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 06:02:18,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 06:02:18,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 06:02:18,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 06:02:18,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 06:02:18,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 06:02:18,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 06:02:18,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 06:02:18,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 06:02:18,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 06:02:18,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 06:02:18,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 06:02:18,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 06:02:18,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 06:02:18,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 06:02:18,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 06:02:18,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 06:02:18,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 06:02:18,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 06:02:18,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 06:02:18,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 06:02:18,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 06:02:18,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 06:02:18,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 06:02:18,607 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 06:02:18,608 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 06:02:18,608 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 06:02:18,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 06:02:18,609 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 06:02:18,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 06:02:18,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 06:02:18,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 06:02:18,611 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 06:02:18,635 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 06:02:18,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 06:02:18,636 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 06:02:18,636 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 06:02:18,637 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 06:02:18,637 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 06:02:18,637 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 06:02:18,637 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 06:02:18,637 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 06:02:18,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 06:02:18,638 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 06:02:18,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 06:02:18,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 06:02:18,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 06:02:18,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 06:02:18,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 06:02:18,639 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 06:02:18,639 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 06:02:18,639 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 06:02:18,639 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 06:02:18,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 06:02:18,640 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 06:02:18,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 06:02:18,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 06:02:18,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 06:02:18,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 06:02:18,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:02:18,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 06:02:18,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 06:02:18,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 06:02:18,641 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 06:02:18,641 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 06:02:18,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 06:02:18,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 06:02:18,641 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 06:02:18,642 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-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 [2020-12-09 06:02:18,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 06:02:18,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 06:02:18,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 06:02:18,923 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 06:02:18,923 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 06:02:18,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/../../sv-benchmarks/c/loops/ludcmp.c [2020-12-09 06:02:18,971 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/data/a72f7dc54/b0c06bbbb6094d3a9d0bfd6fa96fca3c/FLAG599b58b45 [2020-12-09 06:02:19,361 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 06:02:19,361 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/sv-benchmarks/c/loops/ludcmp.c [2020-12-09 06:02:19,367 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/data/a72f7dc54/b0c06bbbb6094d3a9d0bfd6fa96fca3c/FLAG599b58b45 [2020-12-09 06:02:19,377 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/data/a72f7dc54/b0c06bbbb6094d3a9d0bfd6fa96fca3c [2020-12-09 06:02:19,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 06:02:19,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 06:02:19,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 06:02:19,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 06:02:19,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 06:02:19,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:02:19" (1/1) ... [2020-12-09 06:02:19,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d60763a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:19, skipping insertion in model container [2020-12-09 06:02:19,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:02:19" (1/1) ... [2020-12-09 06:02:19,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 06:02:19,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 06:02:19,498 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/sv-benchmarks/c/loops/ludcmp.c[318,331] [2020-12-09 06:02:19,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:02:19,547 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 06:02:19,556 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/sv-benchmarks/c/loops/ludcmp.c[318,331] [2020-12-09 06:02:19,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:02:19,599 INFO L208 MainTranslator]: Completed translation [2020-12-09 06:02:19,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:19 WrapperNode [2020-12-09 06:02:19,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 06:02:19,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 06:02:19,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 06:02:19,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 06:02:19,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:19" (1/1) ... [2020-12-09 06:02:19,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:19" (1/1) ... [2020-12-09 06:02:19,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 06:02:19,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 06:02:19,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 06:02:19,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 06:02:19,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:19" (1/1) ... [2020-12-09 06:02:19,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:19" (1/1) ... [2020-12-09 06:02:19,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:19" (1/1) ... [2020-12-09 06:02:19,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:19" (1/1) ... [2020-12-09 06:02:19,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:19" (1/1) ... [2020-12-09 06:02:19,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:19" (1/1) ... [2020-12-09 06:02:19,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:19" (1/1) ... [2020-12-09 06:02:19,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 06:02:19,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 06:02:19,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 06:02:19,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 06:02:19,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:02:19,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2020-12-09 06:02:19,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-12-09 06:02:19,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 06:02:19,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 06:02:19,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 06:02:19,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 06:02:19,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 06:02:36,023 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 06:02:36,023 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-09 06:02:36,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:02:36 BoogieIcfgContainer [2020-12-09 06:02:36,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 06:02:36,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 06:02:36,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 06:02:36,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 06:02:36,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:02:19" (1/3) ... [2020-12-09 06:02:36,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86643b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:02:36, skipping insertion in model container [2020-12-09 06:02:36,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:19" (2/3) ... [2020-12-09 06:02:36,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86643b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:02:36, skipping insertion in model container [2020-12-09 06:02:36,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:02:36" (3/3) ... [2020-12-09 06:02:36,033 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2020-12-09 06:02:36,045 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 06:02:36,047 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 06:02:36,054 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 06:02:36,069 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 06:02:36,069 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 06:02:36,069 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 06:02:36,070 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 06:02:36,070 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 06:02:36,070 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 06:02:36,070 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 06:02:36,070 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 06:02:36,078 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-12-09 06:02:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 06:02:36,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:02:36,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:02:36,082 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:02:36,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:02:36,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2020-12-09 06:02:36,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 06:02:36,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749808222] [2020-12-09 06:02:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 06:02:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:02:36,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 06:02:36,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:02:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:36,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 06:02:36,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749808222] [2020-12-09 06:02:36,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:02:36,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 06:02:36,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310543693] [2020-12-09 06:02:36,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 06:02:36,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 06:02:36,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 06:02:36,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:02:36,258 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 4 states. [2020-12-09 06:02:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:02:38,309 INFO L93 Difference]: Finished difference Result 102 states and 159 transitions. [2020-12-09 06:02:38,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:02:38,318 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 06:02:38,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:02:38,325 INFO L225 Difference]: With dead ends: 102 [2020-12-09 06:02:38,325 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 06:02:38,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 06:02:38,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 06:02:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2020-12-09 06:02:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 06:02:38,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-09 06:02:38,355 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2020-12-09 06:02:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:02:38,355 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-09 06:02:38,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 06:02:38,355 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-09 06:02:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 06:02:38,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:02:38,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:02:38,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 06:02:38,558 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:02:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:02:38,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1948892579, now seen corresponding path program 1 times [2020-12-09 06:02:38,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 06:02:38,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574288484] [2020-12-09 06:02:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 06:02:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:02:38,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 06:02:38,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:02:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:38,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:02:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:39,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574288484] [2020-12-09 06:02:39,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1746282090] [2020-12-09 06:02:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt [2020-12-09 06:02:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:02:39,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 06:02:39,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:02:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:39,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:02:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:39,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830014254] [2020-12-09 06:02:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:02:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:02:39,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 06:02:39,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:02:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:39,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:02:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:39,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 06:02:39,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2020-12-09 06:02:39,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047487660] [2020-12-09 06:02:39,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 06:02:39,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 06:02:39,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 06:02:39,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 06:02:39,577 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2020-12-09 06:02:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:02:42,916 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2020-12-09 06:02:42,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 06:02:42,924 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-09 06:02:42,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:02:42,925 INFO L225 Difference]: With dead ends: 38 [2020-12-09 06:02:42,925 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 06:02:42,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-09 06:02:42,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 06:02:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-09 06:02:42,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 06:02:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-12-09 06:02:42,930 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2020-12-09 06:02:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:02:42,930 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-12-09 06:02:42,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 06:02:42,931 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-12-09 06:02:42,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 06:02:42,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:02:42,931 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:02:43,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3,4 cvc4 --incremental --print-success --lang smt,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:02:43,535 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:02:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:02:43,537 INFO L82 PathProgramCache]: Analyzing trace with hash -439332020, now seen corresponding path program 2 times [2020-12-09 06:02:43,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 06:02:43,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702061592] [2020-12-09 06:02:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 06:02:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:02:44,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 06:02:44,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:02:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 06:02:44,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:02:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 06:02:44,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702061592] [2020-12-09 06:02:44,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1977306626] [2020-12-09 06:02:44,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt [2020-12-09 06:02:44,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 06:02:44,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:02:44,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 06:02:44,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:02:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 06:02:44,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:02:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 06:02:44,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973330739] [2020-12-09 06:02:44,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:02:45,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 06:02:45,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:02:45,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 06:02:45,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:02:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 06:02:45,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:02:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 06:02:45,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 06:02:45,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2020-12-09 06:02:45,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046746779] [2020-12-09 06:02:45,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 06:02:45,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 06:02:45,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 06:02:45,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-09 06:02:45,254 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 8 states. [2020-12-09 06:02:50,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:02:50,013 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2020-12-09 06:02:50,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 06:02:50,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-12-09 06:02:50,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:02:50,017 INFO L225 Difference]: With dead ends: 126 [2020-12-09 06:02:50,017 INFO L226 Difference]: Without dead ends: 102 [2020-12-09 06:02:50,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-09 06:02:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-09 06:02:50,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-12-09 06:02:50,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-09 06:02:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-12-09 06:02:50,030 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 23 [2020-12-09 06:02:50,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:02:50,030 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-12-09 06:02:50,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 06:02:50,030 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-12-09 06:02:50,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 06:02:50,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:02:50,031 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:02:50,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:02:50,633 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:02:50,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:02:50,635 INFO L82 PathProgramCache]: Analyzing trace with hash 756876242, now seen corresponding path program 1 times [2020-12-09 06:02:50,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 06:02:50,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967021042] [2020-12-09 06:02:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 06:02:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:02:51,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 06:02:51,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:02:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:51,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:02:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:51,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967021042] [2020-12-09 06:02:51,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1483829741] [2020-12-09 06:02:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt [2020-12-09 06:02:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:02:52,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 06:02:52,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:02:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:52,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:02:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:52,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503514349] [2020-12-09 06:02:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:02:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:02:52,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 06:02:52,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:02:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:53,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:02:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:53,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 06:02:53,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2020-12-09 06:02:53,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838915243] [2020-12-09 06:02:53,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 06:02:53,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 06:02:53,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 06:02:53,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-12-09 06:02:53,071 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 14 states. [2020-12-09 06:02:59,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:02:59,544 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2020-12-09 06:02:59,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 06:02:59,555 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-12-09 06:02:59,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:02:59,557 INFO L225 Difference]: With dead ends: 137 [2020-12-09 06:02:59,557 INFO L226 Difference]: Without dead ends: 98 [2020-12-09 06:02:59,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-12-09 06:02:59,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-09 06:02:59,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-12-09 06:02:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-09 06:02:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2020-12-09 06:02:59,572 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 23 [2020-12-09 06:02:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:02:59,573 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2020-12-09 06:02:59,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 06:02:59,573 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2020-12-09 06:02:59,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-09 06:02:59,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:02:59,574 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:03:00,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:03:00,178 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:03:00,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:03:00,180 INFO L82 PathProgramCache]: Analyzing trace with hash -642360546, now seen corresponding path program 2 times [2020-12-09 06:03:00,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 06:03:00,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906332774] [2020-12-09 06:03:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-09 06:03:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:03:00,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 06:03:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:03:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 06:03:01,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:03:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 06:03:01,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906332774] [2020-12-09 06:03:01,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1809551036] [2020-12-09 06:03:01,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt [2020-12-09 06:03:02,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 06:03:02,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:03:02,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 06:03:02,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:03:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 06:03:02,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:03:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 06:03:02,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712694006] [2020-12-09 06:03:02,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:03:02,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 06:03:02,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:03:02,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 06:03:02,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:03:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 06:03:03,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:03:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:03:05,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 06:03:05,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 11] total 29 [2020-12-09 06:03:05,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906100282] [2020-12-09 06:03:05,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-09 06:03:05,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 06:03:05,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-09 06:03:05,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2020-12-09 06:03:05,051 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 29 states. [2020-12-09 06:03:09,718 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-09 06:03:11,738 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-09 06:03:30,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:03:30,124 INFO L93 Difference]: Finished difference Result 389 states and 459 transitions. [2020-12-09 06:03:30,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-09 06:03:30,125 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2020-12-09 06:03:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:03:30,128 INFO L225 Difference]: With dead ends: 389 [2020-12-09 06:03:30,128 INFO L226 Difference]: Without dead ends: 315 [2020-12-09 06:03:30,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1236, Invalid=4020, Unknown=0, NotChecked=0, Total=5256 [2020-12-09 06:03:30,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-12-09 06:03:30,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 164. [2020-12-09 06:03:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-09 06:03:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 186 transitions. [2020-12-09 06:03:30,156 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 186 transitions. Word has length 31 [2020-12-09 06:03:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:03:30,156 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 186 transitions. [2020-12-09 06:03:30,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-09 06:03:30,157 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 186 transitions. [2020-12-09 06:03:30,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-09 06:03:30,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:03:30,158 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:03:30,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 cvc4 --incremental --print-success --lang smt,12 mathsat -unsat_core_generation=3 [2020-12-09 06:03:30,762 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:03:30,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:03:30,763 INFO L82 PathProgramCache]: Analyzing trace with hash 58704032, now seen corresponding path program 3 times [2020-12-09 06:03:30,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 06:03:30,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704193014] [2020-12-09 06:03:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-12-09 06:03:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 06:03:31,709 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 06:03:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 06:03:32,622 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 06:03:32,706 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 06:03:32,706 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 06:03:32,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2020-12-09 06:03:32,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:03:32 BoogieIcfgContainer [2020-12-09 06:03:32,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 06:03:32,977 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 06:03:32,977 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 06:03:32,977 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 06:03:32,977 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:02:36" (3/4) ... [2020-12-09 06:03:32,979 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 06:03:33,017 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1d0c88af-55c6-4d65-a3d9-8d645b7fe993/bin/utaipan/witness.graphml [2020-12-09 06:03:33,017 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 06:03:33,018 INFO L168 Benchmark]: Toolchain (without parser) took 73638.46 ms. Allocated memory was 54.5 MB in the beginning and 109.1 MB in the end (delta: 54.5 MB). Free memory was 32.7 MB in the beginning and 53.2 MB in the end (delta: -20.5 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. [2020-12-09 06:03:33,018 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 54.5 MB. Free memory was 37.2 MB in the beginning and 37.1 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:03:33,019 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.91 ms. Allocated memory was 54.5 MB in the beginning and 109.1 MB in the end (delta: 54.5 MB). Free memory was 32.5 MB in the beginning and 93.1 MB in the end (delta: -60.5 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2020-12-09 06:03:33,019 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.41 ms. Allocated memory is still 109.1 MB. Free memory was 93.1 MB in the beginning and 91.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:03:33,020 INFO L168 Benchmark]: Boogie Preprocessor took 30.70 ms. Allocated memory is still 109.1 MB. Free memory was 91.0 MB in the beginning and 88.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:03:33,020 INFO L168 Benchmark]: RCFGBuilder took 16351.02 ms. Allocated memory is still 109.1 MB. Free memory was 88.5 MB in the beginning and 84.0 MB in the end (delta: 4.5 MB). Peak memory consumption was 29.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:03:33,020 INFO L168 Benchmark]: TraceAbstraction took 56949.44 ms. Allocated memory is still 109.1 MB. Free memory was 83.6 MB in the beginning and 57.4 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.1 GB. [2020-12-09 06:03:33,021 INFO L168 Benchmark]: Witness Printer took 40.49 ms. Allocated memory is still 109.1 MB. Free memory was 57.4 MB in the beginning and 53.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 06:03:33,023 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 54.5 MB. Free memory was 37.2 MB in the beginning and 37.1 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 219.91 ms. Allocated memory was 54.5 MB in the beginning and 109.1 MB in the end (delta: 54.5 MB). Free memory was 32.5 MB in the beginning and 93.1 MB in the end (delta: -60.5 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.41 ms. Allocated memory is still 109.1 MB. Free memory was 93.1 MB in the beginning and 91.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.70 ms. Allocated memory is still 109.1 MB. Free memory was 91.0 MB in the beginning and 88.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 16351.02 ms. Allocated memory is still 109.1 MB. Free memory was 88.5 MB in the beginning and 84.0 MB in the end (delta: 4.5 MB). Peak memory consumption was 29.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 56949.44 ms. Allocated memory is still 109.1 MB. Free memory was 83.6 MB in the beginning and 57.4 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.1 GB. * Witness Printer took 40.49 ms. Allocated memory is still 109.1 MB. Free memory was 57.4 MB in the beginning and 53.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L71] double a[50][50], b[50], x[50]; VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L99] COND FALSE !(i == j) VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L99] COND FALSE !(i == j) VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L99] COND FALSE !(i == j) VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L99] COND FALSE !(i == j) VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L99] COND FALSE !(i == j) VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L96] COND FALSE !(j <= n) VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L6] COND TRUE !(cond) VAL [a={6:0}, b={2:0}, x={-2147483645:0}] [L7] reach_error() VAL [a={6:0}, b={2:0}, x={-2147483645:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 56.8s, OverallIterations: 6, TraceHistogramMax: 6, AutomataDifference: 41.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 86 SDtfs, 813 SDslu, 224 SDs, 0 SdLazy, 688 SolverSat, 226 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 559 GetRequests, 447 SyntacticMatches, 10 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 11.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 185 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 302 NumberOfCodeBlocks, 302 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 510 ConstructedInterpolants, 0 QuantifiedInterpolants, 56172 SizeOfPredicates, 25 NumberOfNonLiveVariables, 929 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 326/738 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...