./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs --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 38561929b5142acce65cab4da64e7c4ae5f17524 .......................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs --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 38561929b5142acce65cab4da64e7c4ae5f17524 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.1-dev-5709675 [2021-10-16 02:51:25,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:51:25,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:51:25,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:51:25,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:51:25,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:51:25,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:51:25,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:51:25,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:51:25,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:51:25,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:51:25,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:51:25,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:51:25,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:51:25,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:51:25,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:51:25,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:51:25,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:51:25,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:51:25,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:51:25,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:51:25,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:51:25,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:51:25,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:51:25,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:51:25,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:51:25,808 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:51:25,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:51:25,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:51:25,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:51:25,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:51:25,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:51:25,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:51:25,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:51:25,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:51:25,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:51:25,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:51:25,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:51:25,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:51:25,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:51:25,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:51:25,828 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:51:25,878 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:51:25,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:51:25,880 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:51:25,880 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:51:25,881 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:51:25,881 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:51:25,881 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:51:25,881 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:51:25,882 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:51:25,882 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:51:25,882 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:51:25,883 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:51:25,883 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:51:25,883 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:51:25,884 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:51:25,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:51:25,885 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:51:25,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:51:25,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:51:25,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:51:25,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:51:25,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:51:25,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:51:25,887 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:51:25,887 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:51:25,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:51:25,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:51:25,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:51:25,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:51:25,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:51:25,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:51:25,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:51:25,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:51:25,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:51:25,890 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:51:25,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:51:25,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:51:25,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:51:25,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:51:25,891 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2021-10-16 02:51:26,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:51:26,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:51:26,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:51:26,245 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:51:26,246 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:51:26,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-16 02:51:26,333 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/data/88fbd5ba6/02b07f5d61cf413ab90aec102e252bb2/FLAG97f4abf0d [2021-10-16 02:51:27,007 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:51:27,008 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-16 02:51:27,024 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/data/88fbd5ba6/02b07f5d61cf413ab90aec102e252bb2/FLAG97f4abf0d [2021-10-16 02:51:27,329 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/data/88fbd5ba6/02b07f5d61cf413ab90aec102e252bb2 [2021-10-16 02:51:27,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:51:27,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:51:27,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:51:27,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:51:27,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:51:27,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:51:27" (1/1) ... [2021-10-16 02:51:27,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b59ff50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:27, skipping insertion in model container [2021-10-16 02:51:27,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:51:27" (1/1) ... [2021-10-16 02:51:27,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:51:27,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:51:27,661 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-16 02:51:27,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:51:27,674 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:51:27,702 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-16 02:51:27,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:51:27,722 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:51:27,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:27 WrapperNode [2021-10-16 02:51:27,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:51:27,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:51:27,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:51:27,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:51:27,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:27" (1/1) ... [2021-10-16 02:51:27,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:27" (1/1) ... [2021-10-16 02:51:27,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:51:27,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:51:27,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:51:27,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:51:27,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:27" (1/1) ... [2021-10-16 02:51:27,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:27" (1/1) ... [2021-10-16 02:51:27,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:27" (1/1) ... [2021-10-16 02:51:27,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:27" (1/1) ... [2021-10-16 02:51:27,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:27" (1/1) ... [2021-10-16 02:51:27,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:27" (1/1) ... [2021-10-16 02:51:27,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:27" (1/1) ... [2021-10-16 02:51:27,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:51:27,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:51:27,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:51:27,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:51:27,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:27" (1/1) ... [2021-10-16 02:51:27,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:51:27,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:51:27,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:51:27,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:51:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:51:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:51:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-16 02:51:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:51:27,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:51:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:51:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:51:28,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:51:28,752 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-16 02:51:28,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:51:28 BoogieIcfgContainer [2021-10-16 02:51:28,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:51:28,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:51:28,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:51:28,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:51:28,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:51:27" (1/3) ... [2021-10-16 02:51:28,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec4c795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:51:28, skipping insertion in model container [2021-10-16 02:51:28,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:27" (2/3) ... [2021-10-16 02:51:28,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec4c795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:51:28, skipping insertion in model container [2021-10-16 02:51:28,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:51:28" (3/3) ... [2021-10-16 02:51:28,767 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2021-10-16 02:51:28,774 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:51:28,775 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:51:28,840 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:51:28,849 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:51:28,852 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:51:28,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:28,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:51:28,875 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:51:28,875 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:51:28,876 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:51:28,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:51:28,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1375961059, now seen corresponding path program 1 times [2021-10-16 02:51:28,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:51:28,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84235796] [2021-10-16 02:51:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:51:28,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:51:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:51:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:29,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:51:29,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84235796] [2021-10-16 02:51:29,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84235796] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:51:29,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:51:29,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:51:29,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588293186] [2021-10-16 02:51:29,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:51:29,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:51:29,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:51:29,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:51:29,100 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:29,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:51:29,149 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2021-10-16 02:51:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:51:29,151 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:51:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:51:29,161 INFO L225 Difference]: With dead ends: 35 [2021-10-16 02:51:29,162 INFO L226 Difference]: Without dead ends: 16 [2021-10-16 02:51:29,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:51:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-16 02:51:29,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-16 02:51:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-16 02:51:29,219 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-10-16 02:51:29,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:51:29,220 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-16 02:51:29,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:29,221 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-16 02:51:29,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:51:29,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:51:29,222 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:51:29,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:51:29,223 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:51:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:51:29,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2106007434, now seen corresponding path program 1 times [2021-10-16 02:51:29,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:51:29,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116769302] [2021-10-16 02:51:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:51:29,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:51:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:51:29,298 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:51:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:51:29,373 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-16 02:51:29,373 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:51:29,376 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:51:29,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:51:29,386 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:51:29,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:51:29 BoogieIcfgContainer [2021-10-16 02:51:29,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:51:29,416 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:51:29,417 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:51:29,417 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:51:29,418 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:51:28" (3/4) ... [2021-10-16 02:51:29,421 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 02:51:29,422 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:51:29,424 INFO L168 Benchmark]: Toolchain (without parser) took 2088.06 ms. Allocated memory was 107.0 MB in the beginning and 138.4 MB in the end (delta: 31.5 MB). Free memory was 68.9 MB in the beginning and 105.6 MB in the end (delta: -36.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:51:29,425 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 107.0 MB. Free memory is still 85.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:51:29,426 INFO L168 Benchmark]: CACSL2BoogieTranslator took 386.54 ms. Allocated memory is still 107.0 MB. Free memory was 68.7 MB in the beginning and 81.7 MB in the end (delta: -13.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:51:29,427 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.42 ms. Allocated memory is still 107.0 MB. Free memory was 81.7 MB in the beginning and 79.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:51:29,428 INFO L168 Benchmark]: Boogie Preprocessor took 76.17 ms. Allocated memory is still 107.0 MB. Free memory was 79.8 MB in the beginning and 78.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:51:29,429 INFO L168 Benchmark]: RCFGBuilder took 890.20 ms. Allocated memory is still 107.0 MB. Free memory was 78.3 MB in the beginning and 55.6 MB in the end (delta: 22.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:51:29,430 INFO L168 Benchmark]: TraceAbstraction took 657.76 ms. Allocated memory was 107.0 MB in the beginning and 138.4 MB in the end (delta: 31.5 MB). Free memory was 55.2 MB in the beginning and 106.4 MB in the end (delta: -51.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:51:29,431 INFO L168 Benchmark]: Witness Printer took 5.75 ms. Allocated memory is still 138.4 MB. Free memory was 106.4 MB in the beginning and 105.6 MB in the end (delta: 779.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:51:29,435 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 107.0 MB. Free memory is still 85.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 386.54 ms. Allocated memory is still 107.0 MB. Free memory was 68.7 MB in the beginning and 81.7 MB in the end (delta: -13.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.42 ms. Allocated memory is still 107.0 MB. Free memory was 81.7 MB in the beginning and 79.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 76.17 ms. Allocated memory is still 107.0 MB. Free memory was 79.8 MB in the beginning and 78.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 890.20 ms. Allocated memory is still 107.0 MB. Free memory was 78.3 MB in the beginning and 55.6 MB in the end (delta: 22.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 657.76 ms. Allocated memory was 107.0 MB in the beginning and 138.4 MB in the end (delta: 31.5 MB). Free memory was 55.2 MB in the beginning and 106.4 MB in the end (delta: -51.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.75 ms. Allocated memory is still 138.4 MB. Free memory was 106.4 MB in the beginning and 105.6 MB in the end (delta: 779.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 72]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 71, overapproximation of someUnaryFLOAToperation at line 66. Possible FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 549.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 12.3ms, AutomataDifference: 85.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 21.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.8ms SsaConstructionTime, 92.5ms SatisfiabilityAnalysisTime, 58.4ms InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 [2021-10-16 02:51:29,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:51:32,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:51:32,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:51:32,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:51:32,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:51:32,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:51:32,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:51:32,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:51:32,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:51:32,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:51:32,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:51:32,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:51:32,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:51:32,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:51:32,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:51:32,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:51:32,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:51:32,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:51:32,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:51:32,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:51:32,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:51:32,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:51:32,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:51:32,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:51:32,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:51:32,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:51:32,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:51:32,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:51:32,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:51:32,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:51:32,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:51:32,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:51:32,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:51:32,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:51:32,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:51:32,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:51:32,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:51:32,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:51:32,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:51:32,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:51:32,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:51:32,577 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:51:32,631 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:51:32,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:51:32,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:51:32,633 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:51:32,634 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:51:32,634 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:51:32,634 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:51:32,635 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:51:32,635 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:51:32,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:51:32,638 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:51:32,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:51:32,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:51:32,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:51:32,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:51:32,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:51:32,640 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:51:32,640 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:51:32,640 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:51:32,641 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:51:32,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:51:32,641 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:51:32,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:51:32,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:51:32,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:51:32,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:51:32,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:51:32,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:51:32,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:51:32,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:51:32,644 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:51:32,644 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:51:32,644 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:51:32,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:51:32,645 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:51:32,646 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2021-10-16 02:51:33,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:51:33,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:51:33,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:51:33,214 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:51:33,215 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:51:33,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-16 02:51:33,306 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/data/01ed59b7e/f76ed9393341469abd368c489eda7c33/FLAG483ead522 [2021-10-16 02:51:33,969 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:51:33,970 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-16 02:51:33,979 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/data/01ed59b7e/f76ed9393341469abd368c489eda7c33/FLAG483ead522 [2021-10-16 02:51:34,345 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/data/01ed59b7e/f76ed9393341469abd368c489eda7c33 [2021-10-16 02:51:34,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:51:34,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:51:34,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:51:34,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:51:34,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:51:34,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:51:34" (1/1) ... [2021-10-16 02:51:34,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@640ff979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:34, skipping insertion in model container [2021-10-16 02:51:34,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:51:34" (1/1) ... [2021-10-16 02:51:34,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:51:34,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:51:34,571 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-16 02:51:34,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:51:34,594 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:51:34,694 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-16 02:51:34,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:51:34,723 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:51:34,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:34 WrapperNode [2021-10-16 02:51:34,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:51:34,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:51:34,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:51:34,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:51:34,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:34" (1/1) ... [2021-10-16 02:51:34,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:34" (1/1) ... [2021-10-16 02:51:34,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:51:34,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:51:34,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:51:34,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:51:34,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:34" (1/1) ... [2021-10-16 02:51:34,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:34" (1/1) ... [2021-10-16 02:51:34,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:34" (1/1) ... [2021-10-16 02:51:34,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:34" (1/1) ... [2021-10-16 02:51:34,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:34" (1/1) ... [2021-10-16 02:51:34,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:34" (1/1) ... [2021-10-16 02:51:34,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:34" (1/1) ... [2021-10-16 02:51:34,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:51:34,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:51:34,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:51:34,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:51:34,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:34" (1/1) ... [2021-10-16 02:51:34,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:51:34,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:51:34,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:51:34,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:51:35,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:51:35,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:51:35,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:51:35,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:51:35,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:51:35,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-10-16 02:51:35,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:51:35,543 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:51:35,543 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-16 02:51:35,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:51:35 BoogieIcfgContainer [2021-10-16 02:51:35,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:51:35,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:51:35,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:51:35,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:51:35,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:51:34" (1/3) ... [2021-10-16 02:51:35,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7eece0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:51:35, skipping insertion in model container [2021-10-16 02:51:35,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:51:34" (2/3) ... [2021-10-16 02:51:35,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7eece0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:51:35, skipping insertion in model container [2021-10-16 02:51:35,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:51:35" (3/3) ... [2021-10-16 02:51:35,582 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2021-10-16 02:51:35,589 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:51:35,608 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:51:35,719 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:51:35,732 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:51:35,732 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:51:35,755 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:35,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:51:35,779 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:51:35,780 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:51:35,781 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:51:35,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:51:35,794 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-16 02:51:35,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:51:35,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098290002] [2021-10-16 02:51:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:51:35,812 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:51:35,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:51:35,817 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:51:35,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:51:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:51:35,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:51:35,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:51:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:36,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:51:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:36,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:51:36,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098290002] [2021-10-16 02:51:36,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098290002] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:51:36,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:51:36,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:51:36,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374081906] [2021-10-16 02:51:36,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:51:36,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:51:36,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:51:36,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:51:36,188 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:36,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:51:36,220 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-16 02:51:36,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:51:36,223 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:51:36,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:51:36,235 INFO L225 Difference]: With dead ends: 62 [2021-10-16 02:51:36,236 INFO L226 Difference]: Without dead ends: 29 [2021-10-16 02:51:36,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:51:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-16 02:51:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-16 02:51:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-16 02:51:36,283 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-16 02:51:36,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:51:36,284 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-16 02:51:36,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:36,285 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-16 02:51:36,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:51:36,286 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:51:36,286 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:51:36,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:51:36,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:51:36,503 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:51:36,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:51:36,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-16 02:51:36,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:51:36,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112285987] [2021-10-16 02:51:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:51:36,507 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:51:36,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:51:36,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:51:36,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:51:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:51:36,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:51:36,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:51:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:36,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:51:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:36,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:51:36,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112285987] [2021-10-16 02:51:36,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112285987] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:51:36,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:51:36,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:51:36,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792666316] [2021-10-16 02:51:36,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:51:36,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:51:36,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:51:36,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:51:36,801 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:51:36,922 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-10-16 02:51:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:51:36,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-16 02:51:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:51:36,925 INFO L225 Difference]: With dead ends: 68 [2021-10-16 02:51:36,925 INFO L226 Difference]: Without dead ends: 59 [2021-10-16 02:51:36,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:51:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-16 02:51:36,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-10-16 02:51:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-16 02:51:36,938 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-16 02:51:36,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:51:36,938 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-16 02:51:36,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-16 02:51:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 02:51:36,940 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:51:36,940 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:51:36,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:51:37,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:51:37,157 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:51:37,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:51:37,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-16 02:51:37,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:51:37,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006555009] [2021-10-16 02:51:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:51:37,161 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:51:37,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:51:37,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:51:37,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:51:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:51:37,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:51:37,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:51:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:37,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:51:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:37,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:51:37,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006555009] [2021-10-16 02:51:37,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006555009] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:51:37,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:51:37,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 02:51:37,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119176316] [2021-10-16 02:51:37,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:51:37,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:51:37,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:51:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:51:37,528 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:37,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:51:37,598 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-10-16 02:51:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:51:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-16 02:51:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:51:37,600 INFO L225 Difference]: With dead ends: 52 [2021-10-16 02:51:37,601 INFO L226 Difference]: Without dead ends: 26 [2021-10-16 02:51:37,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:51:37,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-16 02:51:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-16 02:51:37,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-16 02:51:37,608 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2021-10-16 02:51:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:51:37,608 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-16 02:51:37,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-16 02:51:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:51:37,610 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:51:37,610 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:51:37,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:51:37,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:51:37,840 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:51:37,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:51:37,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-16 02:51:37,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:51:37,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023550552] [2021-10-16 02:51:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:51:37,843 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:51:37,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:51:37,844 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:51:37,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:51:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:51:37,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:51:37,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:51:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:38,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:51:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:38,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:51:38,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023550552] [2021-10-16 02:51:38,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023550552] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:51:38,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:51:38,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:51:38,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595766659] [2021-10-16 02:51:38,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:51:38,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:51:38,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:51:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:51:38,131 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:38,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:51:38,253 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-10-16 02:51:38,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:51:38,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 02:51:38,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:51:38,260 INFO L225 Difference]: With dead ends: 61 [2021-10-16 02:51:38,260 INFO L226 Difference]: Without dead ends: 52 [2021-10-16 02:51:38,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:51:38,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-16 02:51:38,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2021-10-16 02:51:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-10-16 02:51:38,272 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2021-10-16 02:51:38,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:51:38,272 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-10-16 02:51:38,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-10-16 02:51:38,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:51:38,274 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:51:38,274 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:51:38,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:51:38,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:51:38,475 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:51:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:51:38,476 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-16 02:51:38,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:51:38,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767785477] [2021-10-16 02:51:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:51:38,477 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:51:38,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:51:38,479 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:51:38,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:51:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:51:38,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:51:38,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:51:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:38,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:51:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:39,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:51:39,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767785477] [2021-10-16 02:51:39,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767785477] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:51:39,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:51:39,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:51:39,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700093344] [2021-10-16 02:51:39,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:51:39,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:51:39,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:51:39,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:51:39,008 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:51:39,025 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-10-16 02:51:39,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:51:39,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-16 02:51:39,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:51:39,030 INFO L225 Difference]: With dead ends: 38 [2021-10-16 02:51:39,030 INFO L226 Difference]: Without dead ends: 28 [2021-10-16 02:51:39,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:51:39,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-16 02:51:39,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-16 02:51:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:39,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-16 02:51:39,037 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-16 02:51:39,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:51:39,037 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-16 02:51:39,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-16 02:51:39,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:51:39,039 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:51:39,039 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:51:39,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:51:39,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:51:39,254 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:51:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:51:39,255 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-16 02:51:39,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:51:39,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731279803] [2021-10-16 02:51:39,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:51:39,256 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:51:39,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:51:39,258 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:51:39,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:51:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:51:39,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:51:39,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:51:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:39,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:51:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:39,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:51:39,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731279803] [2021-10-16 02:51:39,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731279803] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:51:39,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:51:39,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-16 02:51:39,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507154132] [2021-10-16 02:51:39,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:51:39,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:51:39,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:51:39,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:51:39,661 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:51:39,774 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-10-16 02:51:39,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:51:39,775 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-16 02:51:39,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:51:39,776 INFO L225 Difference]: With dead ends: 40 [2021-10-16 02:51:39,776 INFO L226 Difference]: Without dead ends: 37 [2021-10-16 02:51:39,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:51:39,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-16 02:51:39,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-16 02:51:39,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-10-16 02:51:39,783 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2021-10-16 02:51:39,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:51:39,784 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-10-16 02:51:39,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-10-16 02:51:39,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 02:51:39,785 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:51:39,786 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:51:39,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:51:40,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:51:40,002 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:51:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:51:40,003 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2021-10-16 02:51:40,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:51:40,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005042973] [2021-10-16 02:51:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:51:40,004 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:51:40,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:51:40,006 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:51:40,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:51:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:51:40,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:51:40,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:51:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:40,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:51:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:40,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:51:40,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005042973] [2021-10-16 02:51:40,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005042973] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:51:40,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:51:40,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-16 02:51:40,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200821289] [2021-10-16 02:51:40,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:51:40,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:51:40,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:51:40,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:51:40,402 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:40,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:51:40,467 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-10-16 02:51:40,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:51:40,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-16 02:51:40,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:51:40,474 INFO L225 Difference]: With dead ends: 43 [2021-10-16 02:51:40,474 INFO L226 Difference]: Without dead ends: 23 [2021-10-16 02:51:40,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:51:40,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-16 02:51:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-16 02:51:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0) internal successors, (22), 22 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2021-10-16 02:51:40,479 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2021-10-16 02:51:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:51:40,480 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2021-10-16 02:51:40,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2021-10-16 02:51:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:51:40,481 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:51:40,481 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:51:40,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:51:40,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:51:40,685 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:51:40,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:51:40,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-16 02:51:40,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:51:40,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876081462] [2021-10-16 02:51:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:51:40,687 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:51:40,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:51:40,688 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:51:40,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:51:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:51:40,926 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:51:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:51:41,094 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:51:41,108 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:51:41,110 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:51:41,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:51:41,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:51:41,339 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:51:41,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:51:41 BoogieIcfgContainer [2021-10-16 02:51:41,397 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:51:41,398 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:51:41,398 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:51:41,398 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:51:41,399 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:51:35" (3/4) ... [2021-10-16 02:51:41,401 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:51:41,468 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:51:41,469 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:51:41,471 INFO L168 Benchmark]: Toolchain (without parser) took 7115.57 ms. Allocated memory was 65.0 MB in the beginning and 98.6 MB in the end (delta: 33.6 MB). Free memory was 44.5 MB in the beginning and 66.3 MB in the end (delta: -21.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:51:41,472 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 65.0 MB. Free memory is still 45.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:51:41,472 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.75 ms. Allocated memory is still 65.0 MB. Free memory was 44.3 MB in the beginning and 47.5 MB in the end (delta: -3.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:51:41,473 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.46 ms. Allocated memory is still 65.0 MB. Free memory was 47.5 MB in the beginning and 45.7 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:51:41,474 INFO L168 Benchmark]: Boogie Preprocessor took 83.15 ms. Allocated memory is still 65.0 MB. Free memory was 45.7 MB in the beginning and 44.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:51:41,475 INFO L168 Benchmark]: RCFGBuilder took 653.44 ms. Allocated memory is still 65.0 MB. Free memory was 44.3 MB in the beginning and 31.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:51:41,475 INFO L168 Benchmark]: TraceAbstraction took 5848.62 ms. Allocated memory was 65.0 MB in the beginning and 98.6 MB in the end (delta: 33.6 MB). Free memory was 30.7 MB in the beginning and 69.2 MB in the end (delta: -38.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:51:41,476 INFO L168 Benchmark]: Witness Printer took 71.24 ms. Allocated memory is still 98.6 MB. Free memory was 69.2 MB in the beginning and 66.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:51:41,480 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 65.0 MB. Free memory is still 45.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 364.75 ms. Allocated memory is still 65.0 MB. Free memory was 44.3 MB in the beginning and 47.5 MB in the end (delta: -3.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 82.46 ms. Allocated memory is still 65.0 MB. Free memory was 47.5 MB in the beginning and 45.7 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 83.15 ms. Allocated memory is still 65.0 MB. Free memory was 45.7 MB in the beginning and 44.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 653.44 ms. Allocated memory is still 65.0 MB. Free memory was 44.3 MB in the beginning and 31.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5848.62 ms. Allocated memory was 65.0 MB in the beginning and 98.6 MB in the end (delta: 33.6 MB). Free memory was 30.7 MB in the beginning and 69.2 MB in the end (delta: -38.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 71.24 ms. Allocated memory is still 98.6 MB. Free memory was 69.2 MB in the beginning and 66.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 72]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L38] COND FALSE !(__fpclassify_float(x) == 0) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L40] COND FALSE !(__fpclassify_float(y) == 0) [L43] EXPR x < y ? x : y [L43] return x < y ? x : y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L47] __uint32_t w; [L50] ieee_float_shape_type gf_u; [L51] gf_u.value = (x) [L52] EXPR gf_u.word [L52] (w) = gf_u.word [L55] return (w & 0x80000000) != 0; [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5629.2ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 37.9ms, AutomataDifference: 628.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 222 SDtfs, 167 SDslu, 326 SDs, 0 SdLazy, 105 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 211.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 172 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 347.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 68.1ms AutomataMinimizationTime, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 118.3ms SsaConstructionTime, 414.4ms SatisfiabilityAnalysisTime, 1688.4ms InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 491 SizeOfPredicates, 27 NumberOfNonLiveVariables, 413 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 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! [2021-10-16 02:51:41,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1893213-2c9d-47d7-a987-a52e9c71114c/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...