./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw --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 e29f062842798044f4f77e299bc6043cf6e874a22c0b9b512a8e0e54ddd042d9 .............................................................................................................................................................................................................................................................................................................. 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_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw --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 e29f062842798044f4f77e299bc6043cf6e874a22c0b9b512a8e0e54ddd042d9 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-e943c26 [2021-10-20 05:41:27,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:41:27,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:41:27,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:41:27,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:41:27,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:41:27,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:41:27,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:41:27,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:41:27,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:41:27,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:41:27,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:41:27,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:41:27,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:41:27,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:41:27,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:41:27,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:41:27,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:41:27,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:41:27,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:41:27,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:41:27,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:41:27,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:41:27,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:41:27,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:41:27,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:41:27,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:41:27,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:41:27,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:41:27,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:41:27,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:41:27,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:41:27,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:41:27,628 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:41:27,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:41:27,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:41:27,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:41:27,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:41:27,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:41:27,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:41:27,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:41:27,637 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 05:41:27,703 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:41:27,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:41:27,706 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:41:27,706 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:41:27,706 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:41:27,707 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:41:27,707 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 05:41:27,707 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:41:27,708 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:41:27,708 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 05:41:27,709 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 05:41:27,710 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:41:27,710 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 05:41:27,711 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 05:41:27,711 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 05:41:27,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:41:27,713 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:41:27,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 05:41:27,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:41:27,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:41:27,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:41:27,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:41:27,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:41:27,715 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:41:27,715 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:41:27,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:41:27,716 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:41:27,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:41:27,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:41:27,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:41:27,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:41:27,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:41:27,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:41:27,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:41:27,720 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 05:41:27,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 05:41:27,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:41:27,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:41:27,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:41:27,722 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_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e29f062842798044f4f77e299bc6043cf6e874a22c0b9b512a8e0e54ddd042d9 [2021-10-20 05:41:28,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:41:28,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:41:28,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:41:28,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:41:28,131 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:41:28,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-20 05:41:28,237 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/data/7ae0fed73/75c6b88894c04912be603bd05befd852/FLAGec03043ad [2021-10-20 05:41:28,843 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:41:28,843 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-20 05:41:28,867 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/data/7ae0fed73/75c6b88894c04912be603bd05befd852/FLAGec03043ad [2021-10-20 05:41:29,157 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/data/7ae0fed73/75c6b88894c04912be603bd05befd852 [2021-10-20 05:41:29,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:41:29,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:41:29,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:41:29,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:41:29,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:41:29,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:41:29" (1/1) ... [2021-10-20 05:41:29,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5be1cade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:29, skipping insertion in model container [2021-10-20 05:41:29,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:41:29" (1/1) ... [2021-10-20 05:41:29,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:41:29,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:41:29,420 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_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-20 05:41:29,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:41:29,433 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:41:29,464 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_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-20 05:41:29,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:41:29,481 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:41:29,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:29 WrapperNode [2021-10-20 05:41:29,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:41:29,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:41:29,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:41:29,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:41:29,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:29" (1/1) ... [2021-10-20 05:41:29,500 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:29" (1/1) ... [2021-10-20 05:41:29,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:41:29,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:41:29,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:41:29,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:41:29,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:29" (1/1) ... [2021-10-20 05:41:29,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:29" (1/1) ... [2021-10-20 05:41:29,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:29" (1/1) ... [2021-10-20 05:41:29,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:29" (1/1) ... [2021-10-20 05:41:29,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:29" (1/1) ... [2021-10-20 05:41:29,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:29" (1/1) ... [2021-10-20 05:41:29,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:29" (1/1) ... [2021-10-20 05:41:29,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:41:29,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:41:29,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:41:29,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:41:29,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:29" (1/1) ... [2021-10-20 05:41:29,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:41:29,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:41:29,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:41:29,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:41:29,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 05:41:29,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:41:29,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-20 05:41:29,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:41:29,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:41:29,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-20 05:41:29,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-20 05:41:30,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:41:30,378 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-20 05:41:30,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:41:30 BoogieIcfgContainer [2021-10-20 05:41:30,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:41:30,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:41:30,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:41:30,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:41:30,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:41:29" (1/3) ... [2021-10-20 05:41:30,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a6dee75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:41:30, skipping insertion in model container [2021-10-20 05:41:30,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:29" (2/3) ... [2021-10-20 05:41:30,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a6dee75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:41:30, skipping insertion in model container [2021-10-20 05:41:30,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:41:30" (3/3) ... [2021-10-20 05:41:30,395 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2021-10-20 05:41:30,401 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:41:30,406 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 05:41:30,489 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:41:30,501 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, mAutomataTypeConcurrency=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 [2021-10-20 05:41:30,501 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-20 05:41:30,520 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) [2021-10-20 05:41:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-20 05:41:30,533 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:41:30,534 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:41:30,534 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:41:30,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:41:30,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1433219361, now seen corresponding path program 1 times [2021-10-20 05:41:30,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:41:30,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635642883] [2021-10-20 05:41:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:41:30,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:41:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:41:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:41:30,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:41:30,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635642883] [2021-10-20 05:41:30,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635642883] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:41:30,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:41:30,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:41:30,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152805791] [2021-10-20 05:41:30,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-20 05:41:30,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:41:30,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-20 05:41:30,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 05:41:30,735 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) [2021-10-20 05:41:30,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:41:30,752 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2021-10-20 05:41:30,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-20 05:41:30,753 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 [2021-10-20 05:41:30,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:41:30,762 INFO L225 Difference]: With dead ends: 35 [2021-10-20 05:41:30,762 INFO L226 Difference]: Without dead ends: 16 [2021-10-20 05:41:30,765 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 [2021-10-20 05:41:30,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-20 05:41:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-20 05:41:30,797 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) [2021-10-20 05:41:30,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-20 05:41:30,799 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-10-20 05:41:30,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:41:30,800 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-20 05:41:30,800 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) [2021-10-20 05:41:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-20 05:41:30,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 05:41:30,801 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:41:30,801 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:41:30,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 05:41:30,802 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:41:30,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:41:30,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2131701560, now seen corresponding path program 1 times [2021-10-20 05:41:30,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:41:30,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009806934] [2021-10-20 05:41:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:41:30,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:41:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:41:30,873 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-20 05:41:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:41:30,964 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-20 05:41:30,964 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-20 05:41:30,966 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:41:30,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 05:41:30,975 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:41:31,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:41:31 BoogieIcfgContainer [2021-10-20 05:41:31,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:41:31,004 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:41:31,005 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:41:31,005 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:41:31,005 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:41:30" (3/4) ... [2021-10-20 05:41:31,009 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-20 05:41:31,009 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:41:31,012 INFO L168 Benchmark]: Toolchain (without parser) took 1845.68 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 49.1 MB in the beginning and 65.8 MB in the end (delta: -16.7 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. [2021-10-20 05:41:31,012 INFO L168 Benchmark]: CDTParser took 1.05 ms. Allocated memory is still 90.2 MB. Free memory is still 65.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:41:31,013 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.13 ms. Allocated memory is still 90.2 MB. Free memory was 48.9 MB in the beginning and 64.7 MB in the end (delta: -15.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-20 05:41:31,014 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.74 ms. Allocated memory is still 90.2 MB. Free memory was 64.7 MB in the beginning and 62.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:41:31,015 INFO L168 Benchmark]: Boogie Preprocessor took 36.12 ms. Allocated memory is still 90.2 MB. Free memory was 62.7 MB in the beginning and 61.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:41:31,016 INFO L168 Benchmark]: RCFGBuilder took 812.43 ms. Allocated memory is still 90.2 MB. Free memory was 61.3 MB in the beginning and 37.1 MB in the end (delta: 24.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-20 05:41:31,016 INFO L168 Benchmark]: TraceAbstraction took 620.59 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 36.8 MB in the beginning and 65.8 MB in the end (delta: -29.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:41:31,017 INFO L168 Benchmark]: Witness Printer took 5.03 ms. Allocated memory is still 109.1 MB. Free memory is still 65.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:41:31,021 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.05 ms. Allocated memory is still 90.2 MB. Free memory is still 65.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.13 ms. Allocated memory is still 90.2 MB. Free memory was 48.9 MB in the beginning and 64.7 MB in the end (delta: -15.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.74 ms. Allocated memory is still 90.2 MB. Free memory was 64.7 MB in the beginning and 62.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.12 ms. Allocated memory is still 90.2 MB. Free memory was 62.7 MB in the beginning and 61.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 812.43 ms. Allocated memory is still 90.2 MB. Free memory was 61.3 MB in the beginning and 37.1 MB in the end (delta: 24.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 620.59 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 36.8 MB in the beginning and 65.8 MB in the end (delta: -29.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.03 ms. Allocated memory is still 109.1 MB. Free memory is still 65.8 MB. There was no memory consumed. 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: 82]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 81, overapproximation of someUnaryDOUBLEoperation at line 76. Possible FailurePath: [L76] double x = -0.0; [L77] double y = 0.0; [L21] __uint32_t msw, lsw; [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L33-L34] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L36-L37] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L40-L41] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L44] return 0; [L48] COND TRUE __fpclassify_double(x) == 0 [L49] return y; [L78] double res = fmin_double(x, y); [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L81] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L82] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 493.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 18.9ms, AutomataDifference: 46.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.8ms, 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: 17.1ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.0ms SsaConstructionTime, 89.7ms SatisfiabilityAnalysisTime, 53.5ms 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 [2021-10-20 05:41:31,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/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-e943c26 [2021-10-20 05:41:34,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:41:34,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:41:34,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:41:34,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:41:34,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:41:34,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:41:34,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:41:34,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:41:34,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:41:34,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:41:34,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:41:34,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:41:34,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:41:34,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:41:34,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:41:34,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:41:34,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:41:34,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:41:34,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:41:34,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:41:34,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:41:34,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:41:34,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:41:34,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:41:34,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:41:34,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:41:34,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:41:34,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:41:34,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:41:34,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:41:34,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:41:34,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:41:34,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:41:34,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:41:34,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:41:34,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:41:34,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:41:34,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:41:34,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:41:34,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:41:34,261 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-20 05:41:34,315 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:41:34,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:41:34,317 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:41:34,317 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:41:34,318 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:41:34,318 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:41:34,318 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:41:34,318 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:41:34,318 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:41:34,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:41:34,322 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:41:34,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:41:34,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:41:34,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:41:34,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:41:34,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:41:34,323 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:41:34,324 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-20 05:41:34,324 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-20 05:41:34,324 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:41:34,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:41:34,324 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:41:34,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:41:34,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:41:34,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-20 05:41:34,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:41:34,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:41:34,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:41:34,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:41:34,327 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:41:34,327 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-20 05:41:34,327 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-20 05:41:34,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:41:34,328 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:41:34,328 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:41:34,329 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_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e29f062842798044f4f77e299bc6043cf6e874a22c0b9b512a8e0e54ddd042d9 [2021-10-20 05:41:34,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:41:34,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:41:34,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:41:34,912 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:41:34,913 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:41:34,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-20 05:41:35,005 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/data/178432f3a/aae2d561ee9a438c8ee5996dc9e26d09/FLAG5885ef1b1 [2021-10-20 05:41:35,694 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:41:35,695 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-20 05:41:35,711 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/data/178432f3a/aae2d561ee9a438c8ee5996dc9e26d09/FLAG5885ef1b1 [2021-10-20 05:41:36,017 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/data/178432f3a/aae2d561ee9a438c8ee5996dc9e26d09 [2021-10-20 05:41:36,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:41:36,025 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:41:36,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:41:36,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:41:36,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:41:36,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:41:36" (1/1) ... [2021-10-20 05:41:36,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3003161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:36, skipping insertion in model container [2021-10-20 05:41:36,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:41:36" (1/1) ... [2021-10-20 05:41:36,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:41:36,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:41:36,357 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_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-20 05:41:36,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:41:36,411 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:41:36,479 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_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-20 05:41:36,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:41:36,521 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:41:36,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:36 WrapperNode [2021-10-20 05:41:36,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:41:36,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:41:36,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:41:36,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:41:36,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:36" (1/1) ... [2021-10-20 05:41:36,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:36" (1/1) ... [2021-10-20 05:41:36,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:41:36,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:41:36,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:41:36,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:41:36,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:36" (1/1) ... [2021-10-20 05:41:36,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:36" (1/1) ... [2021-10-20 05:41:36,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:36" (1/1) ... [2021-10-20 05:41:36,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:36" (1/1) ... [2021-10-20 05:41:36,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:36" (1/1) ... [2021-10-20 05:41:36,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:36" (1/1) ... [2021-10-20 05:41:36,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:36" (1/1) ... [2021-10-20 05:41:36,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:41:36,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:41:36,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:41:36,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:41:36,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:36" (1/1) ... [2021-10-20 05:41:36,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:41:36,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:41:36,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:41:36,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:41:36,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-10-20 05:41:36,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-20 05:41:36,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:41:36,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-20 05:41:36,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:41:36,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:41:36,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-20 05:41:37,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:41:37,365 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-20 05:41:37,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:41:37 BoogieIcfgContainer [2021-10-20 05:41:37,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:41:37,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:41:37,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:41:37,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:41:37,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:41:36" (1/3) ... [2021-10-20 05:41:37,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4542e094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:41:37, skipping insertion in model container [2021-10-20 05:41:37,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:41:36" (2/3) ... [2021-10-20 05:41:37,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4542e094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:41:37, skipping insertion in model container [2021-10-20 05:41:37,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:41:37" (3/3) ... [2021-10-20 05:41:37,396 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2021-10-20 05:41:37,403 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:41:37,403 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 05:41:37,454 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:41:37,462 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, mAutomataTypeConcurrency=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 [2021-10-20 05:41:37,463 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-20 05:41:37,479 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) [2021-10-20 05:41:37,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-20 05:41:37,493 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:41:37,494 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:41:37,495 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:41:37,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:41:37,501 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-20 05:41:37,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:41:37,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905405408] [2021-10-20 05:41:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:41:37,518 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:41:37,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:41:37,524 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:41:37,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-20 05:41:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:41:37,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-20 05:41:37,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:41:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:41:37,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:41:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:41:37,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 05:41:37,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905405408] [2021-10-20 05:41:37,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905405408] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:41:37,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:41:37,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-20 05:41:37,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656195138] [2021-10-20 05:41:37,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-20 05:41:37,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 05:41:37,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-20 05:41:37,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 05:41:37,869 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) [2021-10-20 05:41:37,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:41:37,916 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-20 05:41:37,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-20 05:41:37,918 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 [2021-10-20 05:41:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:41:37,928 INFO L225 Difference]: With dead ends: 62 [2021-10-20 05:41:37,928 INFO L226 Difference]: Without dead ends: 29 [2021-10-20 05:41:37,931 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 [2021-10-20 05:41:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-20 05:41:37,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-20 05:41:37,981 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) [2021-10-20 05:41:37,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-20 05:41:37,984 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-20 05:41:37,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:41:37,984 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-20 05:41:37,992 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) [2021-10-20 05:41:37,993 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-20 05:41:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-20 05:41:37,994 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:41:37,994 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:41:38,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-20 05:41:38,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:41:38,208 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:41:38,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:41:38,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-20 05:41:38,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:41:38,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282702184] [2021-10-20 05:41:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:41:38,210 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:41:38,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:41:38,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:41:38,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-20 05:41:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:41:38,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-20 05:41:38,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:41:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:41:38,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:41:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:41:38,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 05:41:38,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282702184] [2021-10-20 05:41:38,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282702184] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:41:38,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:41:38,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-20 05:41:38,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762881451] [2021-10-20 05:41:38,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-20 05:41:38,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 05:41:38,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-20 05:41:38,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:41:38,544 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) [2021-10-20 05:41:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:41:38,709 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-10-20 05:41:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-20 05:41:38,710 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 [2021-10-20 05:41:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:41:38,714 INFO L225 Difference]: With dead ends: 68 [2021-10-20 05:41:38,715 INFO L226 Difference]: Without dead ends: 59 [2021-10-20 05:41:38,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-20 05:41:38,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-20 05:41:38,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-10-20 05:41:38,736 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) [2021-10-20 05:41:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-20 05:41:38,737 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-20 05:41:38,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:41:38,738 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-20 05:41:38,738 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) [2021-10-20 05:41:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-20 05:41:38,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-20 05:41:38,740 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:41:38,740 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:41:38,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-20 05:41:38,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:41:38,954 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:41:38,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:41:38,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-20 05:41:38,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:41:38,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124839883] [2021-10-20 05:41:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:41:38,957 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:41:38,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:41:38,958 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:41:38,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-20 05:41:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:41:39,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-20 05:41:39,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:41:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:41:39,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:41:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:41:39,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 05:41:39,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124839883] [2021-10-20 05:41:39,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124839883] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:41:39,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:41:39,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-20 05:41:39,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747352871] [2021-10-20 05:41:39,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-20 05:41:39,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 05:41:39,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-20 05:41:39,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:41:39,586 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:41:39,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:41:39,731 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-10-20 05:41:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:41:39,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-20 05:41:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:41:39,736 INFO L225 Difference]: With dead ends: 52 [2021-10-20 05:41:39,736 INFO L226 Difference]: Without dead ends: 28 [2021-10-20 05:41:39,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-20 05:41:39,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-20 05:41:39,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-20 05:41:39,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 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) [2021-10-20 05:41:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-10-20 05:41:39,742 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2021-10-20 05:41:39,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:41:39,743 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-10-20 05:41:39,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:41:39,743 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-10-20 05:41:39,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-20 05:41:39,747 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:41:39,748 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:41:39,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-20 05:41:39,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:41:39,985 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:41:39,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:41:39,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-20 05:41:39,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:41:39,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331203791] [2021-10-20 05:41:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:41:39,988 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:41:39,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:41:39,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:41:40,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-20 05:41:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:41:40,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-20 05:41:40,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:41:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:41:40,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:41:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:41:40,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 05:41:40,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331203791] [2021-10-20 05:41:40,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331203791] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:41:40,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:41:40,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-20 05:41:40,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995652335] [2021-10-20 05:41:40,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-20 05:41:40,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 05:41:40,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-20 05:41:40,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:41:40,311 INFO L87 Difference]: Start difference. First operand 28 states and 35 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) [2021-10-20 05:41:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:41:40,439 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2021-10-20 05:41:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-20 05:41:40,441 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 [2021-10-20 05:41:40,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:41:40,443 INFO L225 Difference]: With dead ends: 65 [2021-10-20 05:41:40,446 INFO L226 Difference]: Without dead ends: 56 [2021-10-20 05:41:40,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-20 05:41:40,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-20 05:41:40,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2021-10-20 05:41:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 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) [2021-10-20 05:41:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-10-20 05:41:40,455 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2021-10-20 05:41:40,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:41:40,456 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-10-20 05:41:40,456 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) [2021-10-20 05:41:40,456 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-10-20 05:41:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-20 05:41:40,457 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:41:40,458 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:41:40,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-20 05:41:40,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:41:40,674 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:41:40,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:41:40,675 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-20 05:41:40,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:41:40,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447725877] [2021-10-20 05:41:40,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:41:40,677 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:41:40,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:41:40,679 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:41:40,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-20 05:41:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:41:40,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-20 05:41:40,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:41:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:41:40,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:41:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:41:41,282 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 05:41:41,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447725877] [2021-10-20 05:41:41,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447725877] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:41:41,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:41:41,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-20 05:41:41,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852145107] [2021-10-20 05:41:41,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:41:41,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 05:41:41,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:41:41,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:41:41,285 INFO L87 Difference]: Start difference. First operand 30 states and 37 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) [2021-10-20 05:41:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:41:41,302 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-10-20 05:41:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:41:41,303 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 [2021-10-20 05:41:41,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:41:41,304 INFO L225 Difference]: With dead ends: 40 [2021-10-20 05:41:41,304 INFO L226 Difference]: Without dead ends: 30 [2021-10-20 05:41:41,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:41:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-20 05:41:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-20 05:41:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:41:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-10-20 05:41:41,311 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2021-10-20 05:41:41,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:41:41,312 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-10-20 05:41:41,312 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) [2021-10-20 05:41:41,312 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-10-20 05:41:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-20 05:41:41,313 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:41:41,314 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:41:41,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-20 05:41:41,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:41:41,535 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:41:41,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:41:41,536 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-20 05:41:41,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:41:41,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939055810] [2021-10-20 05:41:41,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:41:41,537 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:41:41,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:41:41,538 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:41:41,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-20 05:41:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:41:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-20 05:41:41,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:41:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:41:41,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:41:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:41:41,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 05:41:41,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939055810] [2021-10-20 05:41:41,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939055810] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:41:41,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:41:41,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-20 05:41:41,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355054774] [2021-10-20 05:41:41,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 05:41:41,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 05:41:41,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 05:41:41,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-20 05:41:41,986 INFO L87 Difference]: Start difference. First operand 30 states and 36 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) [2021-10-20 05:41:42,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:41:42,121 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-10-20 05:41:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-20 05:41:42,122 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 [2021-10-20 05:41:42,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:41:42,123 INFO L225 Difference]: With dead ends: 42 [2021-10-20 05:41:42,123 INFO L226 Difference]: Without dead ends: 39 [2021-10-20 05:41:42,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-20 05:41:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-20 05:41:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-10-20 05:41:42,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 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) [2021-10-20 05:41:42,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-10-20 05:41:42,130 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 18 [2021-10-20 05:41:42,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:41:42,131 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-10-20 05:41:42,131 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) [2021-10-20 05:41:42,131 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-10-20 05:41:42,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-20 05:41:42,132 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:41:42,133 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:41:42,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-20 05:41:42,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:41:42,349 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:41:42,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:41:42,349 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2021-10-20 05:41:42,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:41:42,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045938335] [2021-10-20 05:41:42,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:41:42,351 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:41:42,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:41:42,352 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:41:42,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-20 05:41:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:41:42,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-20 05:41:42,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:41:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:41:42,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:41:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:41:42,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 05:41:42,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045938335] [2021-10-20 05:41:42,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045938335] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:41:42,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:41:42,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-20 05:41:42,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212095049] [2021-10-20 05:41:42,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-20 05:41:42,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 05:41:42,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-20 05:41:42,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-20 05:41:42,957 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-10-20 05:41:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:41:43,049 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-10-20 05:41:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 05:41:43,054 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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 19 [2021-10-20 05:41:43,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:41:43,054 INFO L225 Difference]: With dead ends: 45 [2021-10-20 05:41:43,054 INFO L226 Difference]: Without dead ends: 27 [2021-10-20 05:41:43,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:41:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-20 05:41:43,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-20 05:41:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 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) [2021-10-20 05:41:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-20 05:41:43,068 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2021-10-20 05:41:43,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:41:43,068 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-20 05:41:43,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-10-20 05:41:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-20 05:41:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-20 05:41:43,070 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:41:43,070 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] [2021-10-20 05:41:43,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-20 05:41:43,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:41:43,287 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:41:43,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:41:43,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-20 05:41:43,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:41:43,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130801685] [2021-10-20 05:41:43,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:41:43,290 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:41:43,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:41:43,293 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:41:43,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-20 05:41:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:41:43,521 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-20 05:41:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:41:43,715 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-20 05:41:43,715 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-20 05:41:43,716 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:41:43,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-20 05:41:43,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:41:43,934 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:41:44,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:41:44 BoogieIcfgContainer [2021-10-20 05:41:44,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:41:44,005 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:41:44,005 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:41:44,005 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:41:44,006 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:41:37" (3/4) ... [2021-10-20 05:41:44,009 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-20 05:41:44,102 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 05:41:44,102 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:41:44,104 INFO L168 Benchmark]: Toolchain (without parser) took 8078.77 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 38.2 MB in the beginning and 35.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. [2021-10-20 05:41:44,105 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 58.7 MB. Free memory is still 39.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:41:44,106 INFO L168 Benchmark]: CACSL2BoogieTranslator took 494.10 ms. Allocated memory is still 58.7 MB. Free memory was 38.1 MB in the beginning and 40.4 MB in the end (delta: -2.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-20 05:41:44,106 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.17 ms. Allocated memory is still 58.7 MB. Free memory was 40.1 MB in the beginning and 38.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:41:44,107 INFO L168 Benchmark]: Boogie Preprocessor took 81.70 ms. Allocated memory is still 58.7 MB. Free memory was 38.5 MB in the beginning and 36.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-20 05:41:44,108 INFO L168 Benchmark]: RCFGBuilder took 669.51 ms. Allocated memory is still 58.7 MB. Free memory was 36.6 MB in the beginning and 22.9 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-20 05:41:44,108 INFO L168 Benchmark]: TraceAbstraction took 6634.51 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 22.4 MB in the beginning and 38.5 MB in the end (delta: -16.0 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-20 05:41:44,109 INFO L168 Benchmark]: Witness Printer took 97.98 ms. Allocated memory is still 79.7 MB. Free memory was 38.5 MB in the beginning and 35.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:41:44,112 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 58.7 MB. Free memory is still 39.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 494.10 ms. Allocated memory is still 58.7 MB. Free memory was 38.1 MB in the beginning and 40.4 MB in the end (delta: -2.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 84.17 ms. Allocated memory is still 58.7 MB. Free memory was 40.1 MB in the beginning and 38.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 81.70 ms. Allocated memory is still 58.7 MB. Free memory was 38.5 MB in the beginning and 36.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 669.51 ms. Allocated memory is still 58.7 MB. Free memory was 36.6 MB in the beginning and 22.9 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6634.51 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 22.4 MB in the beginning and 38.5 MB in the end (delta: -16.0 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Witness Printer took 97.98 ms. Allocated memory is still 79.7 MB. Free memory was 38.5 MB in the beginning and 35.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 82]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L76] double x = -0.0; [L77] double y = 0.0; [L21] __uint32_t msw, lsw; [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L32] return 2; [L48] COND FALSE !(__fpclassify_double(x) == 0) [L21] __uint32_t msw, lsw; [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L32] return 2; [L50] COND FALSE !(__fpclassify_double(y) == 0) [L53] EXPR x < y ? x : y [L53] return x < y ? x : y; [L78] double res = fmin_double(x, y); [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L57] __uint32_t msw; [L60] ieee_double_shape_type gh_u; [L61] gh_u.value = (x) [L62] EXPR gh_u.parts.msw [L62] (msw) = gh_u.parts.msw [L65] return (msw & 0x80000000) != 0; [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L81] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L82] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6480.4ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 28.8ms, AutomataDifference: 812.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 234 SDtfs, 249 SDslu, 387 SDs, 0 SdLazy, 128 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 326.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 498.3ms 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: 92.5ms AutomataMinimizationTime, 7 MinimizatonAttempts, 61 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 125.0ms SsaConstructionTime, 533.8ms SatisfiabilityAnalysisTime, 2225.3ms InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 15 QuantifiedInterpolants, 666 SizeOfPredicates, 27 NumberOfNonLiveVariables, 423 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! [2021-10-20 05:41:44,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_067cfc9b-7cf0-44f8-bf12-eeb53a890d86/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...