./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG --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 c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 ........................................................................................................................................................................................................................................................................................................... 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_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG --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 c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-b2eff8b [2021-10-29 05:52:20,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:52:20,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:52:20,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:52:20,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:52:20,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:52:20,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:52:20,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:52:20,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:52:20,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:52:20,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:52:20,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:52:20,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:52:20,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:52:20,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:52:20,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:52:20,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:52:20,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:52:20,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:52:20,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:52:20,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:52:20,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:52:20,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:52:20,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:52:20,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:52:20,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:52:20,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:52:20,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:52:20,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:52:20,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:52:20,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:52:20,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:52:20,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:52:20,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:52:20,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:52:20,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:52:20,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:52:20,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:52:20,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:52:20,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:52:20,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:52:20,340 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:52:20,366 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:52:20,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:52:20,367 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:52:20,368 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:52:20,368 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:52:20,368 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:52:20,368 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:52:20,368 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:52:20,369 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:52:20,369 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:52:20,369 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:52:20,369 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:52:20,369 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:52:20,370 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:52:20,370 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:52:20,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:52:20,371 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:52:20,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:52:20,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:52:20,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:52:20,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:52:20,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:52:20,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:52:20,371 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:52:20,372 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:52:20,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:52:20,372 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:52:20,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:52:20,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:52:20,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:52:20,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:52:20,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:52:20,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:52:20,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:52:20,373 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:52:20,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:52:20,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:52:20,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:52:20,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:52:20,383 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_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 [2021-10-29 05:52:20,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:52:20,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:52:20,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:52:20,662 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:52:20,662 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:52:20,663 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-29 05:52:20,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/data/29d53c078/6f9ada31d2924ba18651911f3d97fb2f/FLAGba1aaf68b [2021-10-29 05:52:21,143 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:52:21,144 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-29 05:52:21,149 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/data/29d53c078/6f9ada31d2924ba18651911f3d97fb2f/FLAGba1aaf68b [2021-10-29 05:52:21,559 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/data/29d53c078/6f9ada31d2924ba18651911f3d97fb2f [2021-10-29 05:52:21,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:52:21,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:52:21,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:52:21,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:52:21,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:52:21,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:52:21" (1/1) ... [2021-10-29 05:52:21,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2500429a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:21, skipping insertion in model container [2021-10-29 05:52:21,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:52:21" (1/1) ... [2021-10-29 05:52:21,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:52:21,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:52:21,789 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_e5862f82-88b0-4e1b-8101-34efeb8c0337/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-29 05:52:21,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:52:21,800 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:52:21,822 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_e5862f82-88b0-4e1b-8101-34efeb8c0337/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-29 05:52:21,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:52:21,836 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:52:21,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:21 WrapperNode [2021-10-29 05:52:21,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:52:21,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:52:21,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:52:21,838 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:52:21,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:21" (1/1) ... [2021-10-29 05:52:21,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:21" (1/1) ... [2021-10-29 05:52:21,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:52:21,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:52:21,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:52:21,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:52:21,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:21" (1/1) ... [2021-10-29 05:52:21,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:21" (1/1) ... [2021-10-29 05:52:21,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:21" (1/1) ... [2021-10-29 05:52:21,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:21" (1/1) ... [2021-10-29 05:52:21,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:21" (1/1) ... [2021-10-29 05:52:21,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:21" (1/1) ... [2021-10-29 05:52:21,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:21" (1/1) ... [2021-10-29 05:52:21,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:52:21,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:52:21,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:52:21,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:52:21,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:21" (1/1) ... [2021-10-29 05:52:21,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:52:21,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:52:21,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:52:21,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:52:21,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:52:21,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:52:21,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-29 05:52:21,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:52:21,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:52:21,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-29 05:52:21,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 05:52:22,632 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:52:22,632 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-29 05:52:22,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:52:22 BoogieIcfgContainer [2021-10-29 05:52:22,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:52:22,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:52:22,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:52:22,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:52:22,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:52:21" (1/3) ... [2021-10-29 05:52:22,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bcf2c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:52:22, skipping insertion in model container [2021-10-29 05:52:22,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:21" (2/3) ... [2021-10-29 05:52:22,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bcf2c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:52:22, skipping insertion in model container [2021-10-29 05:52:22,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:52:22" (3/3) ... [2021-10-29 05:52:22,653 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2021-10-29 05:52:22,658 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:52:22,658 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 05:52:22,714 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:52:22,720 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 [2021-10-29 05:52:22,720 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 05:52:22,733 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) [2021-10-29 05:52:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 05:52:22,738 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:22,739 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:22,739 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:22,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:22,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1433219361, now seen corresponding path program 1 times [2021-10-29 05:52:22,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:22,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925733509] [2021-10-29 05:52:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:22,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:22,920 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:22,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925733509] [2021-10-29 05:52:22,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925733509] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:22,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:22,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:52:22,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349902035] [2021-10-29 05:52:22,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:52:22,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:22,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:52:22,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:52:22,943 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) [2021-10-29 05:52:22,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:22,957 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2021-10-29 05:52:22,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:52:22,959 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 [2021-10-29 05:52:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:22,966 INFO L225 Difference]: With dead ends: 35 [2021-10-29 05:52:22,966 INFO L226 Difference]: Without dead ends: 16 [2021-10-29 05:52:22,969 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:52:22,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-29 05:52:22,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-29 05:52:22,997 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) [2021-10-29 05:52:22,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-29 05:52:22,999 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-10-29 05:52:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:22,999 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-29 05:52:23,000 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) [2021-10-29 05:52:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-29 05:52:23,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-29 05:52:23,001 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:23,001 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:23,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:52:23,002 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:23,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:23,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2131701560, now seen corresponding path program 1 times [2021-10-29 05:52:23,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:23,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887380482] [2021-10-29 05:52:23,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:23,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:52:23,049 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:52:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:52:23,102 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:52:23,103 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:52:23,104 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:52:23,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 05:52:23,109 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-10-29 05:52:23,112 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:52:23,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:52:23 BoogieIcfgContainer [2021-10-29 05:52:23,134 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:52:23,134 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:52:23,134 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:52:23,135 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:52:23,135 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:52:22" (3/4) ... [2021-10-29 05:52:23,138 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 05:52:23,138 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:52:23,140 INFO L168 Benchmark]: Toolchain (without parser) took 1577.04 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 96.4 MB in the beginning and 110.4 MB in the end (delta: -14.1 MB). Peak memory consumption was 11.6 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:23,141 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 123.7 MB. Free memory is still 78.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:52:23,142 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.84 ms. Allocated memory is still 123.7 MB. Free memory was 96.0 MB in the beginning and 97.8 MB in the end (delta: -1.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:23,142 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.67 ms. Allocated memory is still 123.7 MB. Free memory was 97.8 MB in the beginning and 96.0 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:52:23,143 INFO L168 Benchmark]: Boogie Preprocessor took 26.23 ms. Allocated memory is still 123.7 MB. Free memory was 96.0 MB in the beginning and 94.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:23,144 INFO L168 Benchmark]: RCFGBuilder took 731.58 ms. Allocated memory is still 123.7 MB. Free memory was 94.6 MB in the beginning and 71.8 MB in the end (delta: 22.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:23,144 INFO L168 Benchmark]: TraceAbstraction took 497.69 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 71.5 MB in the beginning and 111.2 MB in the end (delta: -39.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:52:23,145 INFO L168 Benchmark]: Witness Printer took 4.20 ms. Allocated memory is still 148.9 MB. Free memory is still 110.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:52:23,148 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 123.7 MB. Free memory is still 78.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 258.84 ms. Allocated memory is still 123.7 MB. Free memory was 96.0 MB in the beginning and 97.8 MB in the end (delta: -1.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.67 ms. Allocated memory is still 123.7 MB. Free memory was 97.8 MB in the beginning and 96.0 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.23 ms. Allocated memory is still 123.7 MB. Free memory was 96.0 MB in the beginning and 94.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 731.58 ms. Allocated memory is still 123.7 MB. Free memory was 94.6 MB in the beginning and 71.8 MB in the end (delta: 22.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 497.69 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 71.5 MB in the beginning and 111.2 MB in the end (delta: -39.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.20 ms. Allocated memory is still 148.9 MB. Free memory is still 110.4 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 81]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 80, overapproximation of someUnaryFLOAToperation at line 76. Possible FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s 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 [2021-10-29 05:52:23,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/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-b2eff8b [2021-10-29 05:52:25,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:52:25,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:52:25,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:52:25,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:52:25,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:52:25,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:52:25,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:52:25,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:52:25,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:52:25,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:52:25,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:52:25,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:52:25,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:52:25,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:52:25,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:52:25,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:52:25,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:52:25,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:52:25,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:52:25,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:52:25,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:52:25,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:52:25,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:52:25,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:52:25,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:52:25,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:52:25,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:52:25,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:52:25,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:52:25,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:52:25,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:52:25,675 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:52:25,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:52:25,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:52:25,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:52:25,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:52:25,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:52:25,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:52:25,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:52:25,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:52:25,692 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-29 05:52:25,731 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:52:25,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:52:25,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:52:25,733 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:52:25,733 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:52:25,733 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:52:25,733 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:52:25,733 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:52:25,734 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:52:25,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:52:25,736 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:52:25,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:52:25,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:52:25,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:52:25,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:52:25,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:52:25,737 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:52:25,737 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-29 05:52:25,738 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-29 05:52:25,738 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:52:25,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:52:25,738 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:52:25,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:52:25,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:52:25,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 05:52:25,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:52:25,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:52:25,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:52:25,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:52:25,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:52:25,740 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-29 05:52:25,740 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-29 05:52:25,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:52:25,741 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:52:25,741 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:52:25,742 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_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 [2021-10-29 05:52:26,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:52:26,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:52:26,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:52:26,137 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:52:26,137 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:52:26,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-29 05:52:26,212 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/data/edf65936b/bd47b42f164d48d3830cf0abc6bfc2f7/FLAG13dacd057 [2021-10-29 05:52:26,773 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:52:26,774 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-29 05:52:26,781 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/data/edf65936b/bd47b42f164d48d3830cf0abc6bfc2f7/FLAG13dacd057 [2021-10-29 05:52:27,109 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/data/edf65936b/bd47b42f164d48d3830cf0abc6bfc2f7 [2021-10-29 05:52:27,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:52:27,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:52:27,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:52:27,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:52:27,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:52:27,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:52:27" (1/1) ... [2021-10-29 05:52:27,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12899827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:27, skipping insertion in model container [2021-10-29 05:52:27,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:52:27" (1/1) ... [2021-10-29 05:52:27,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:52:27,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:52:27,344 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_e5862f82-88b0-4e1b-8101-34efeb8c0337/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-29 05:52:27,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:52:27,366 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:52:27,411 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_e5862f82-88b0-4e1b-8101-34efeb8c0337/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-29 05:52:27,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:52:27,434 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:52:27,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:27 WrapperNode [2021-10-29 05:52:27,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:52:27,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:52:27,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:52:27,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:52:27,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:27" (1/1) ... [2021-10-29 05:52:27,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:27" (1/1) ... [2021-10-29 05:52:27,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:52:27,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:52:27,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:52:27,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:52:27,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:27" (1/1) ... [2021-10-29 05:52:27,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:27" (1/1) ... [2021-10-29 05:52:27,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:27" (1/1) ... [2021-10-29 05:52:27,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:27" (1/1) ... [2021-10-29 05:52:27,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:27" (1/1) ... [2021-10-29 05:52:27,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:27" (1/1) ... [2021-10-29 05:52:27,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:27" (1/1) ... [2021-10-29 05:52:27,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:52:27,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:52:27,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:52:27,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:52:27,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:27" (1/1) ... [2021-10-29 05:52:27,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:52:27,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:52:27,579 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:52:27,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:52:27,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-29 05:52:27,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:52:27,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-29 05:52:27,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:52:27,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:52:27,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-10-29 05:52:27,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 05:52:28,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:52:28,151 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-29 05:52:28,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:52:28 BoogieIcfgContainer [2021-10-29 05:52:28,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:52:28,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:52:28,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:52:28,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:52:28,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:52:27" (1/3) ... [2021-10-29 05:52:28,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382ae62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:52:28, skipping insertion in model container [2021-10-29 05:52:28,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:27" (2/3) ... [2021-10-29 05:52:28,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382ae62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:52:28, skipping insertion in model container [2021-10-29 05:52:28,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:52:28" (3/3) ... [2021-10-29 05:52:28,161 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2021-10-29 05:52:28,167 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:52:28,167 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 05:52:28,215 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:52:28,222 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 [2021-10-29 05:52:28,222 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 05:52:28,237 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) [2021-10-29 05:52:28,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 05:52:28,242 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:28,243 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:28,243 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:28,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:28,249 INFO L85 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-29 05:52:28,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:52:28,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134636893] [2021-10-29 05:52:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:28,262 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:52:28,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:52:28,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:52:28,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-29 05:52:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:28,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-29 05:52:28,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:52:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:28,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:52:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:28,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:52:28,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134636893] [2021-10-29 05:52:28,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134636893] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:28,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:28,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 05:52:28,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917764484] [2021-10-29 05:52:28,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:52:28,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:52:28,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:52:28,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:52:28,549 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) [2021-10-29 05:52:28,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:28,572 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-29 05:52:28,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:52:28,573 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 [2021-10-29 05:52:28,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:28,600 INFO L225 Difference]: With dead ends: 62 [2021-10-29 05:52:28,601 INFO L226 Difference]: Without dead ends: 29 [2021-10-29 05:52:28,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:52:28,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-29 05:52:28,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-29 05:52:28,642 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) [2021-10-29 05:52:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-29 05:52:28,646 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-29 05:52:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:28,647 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-29 05:52:28,647 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) [2021-10-29 05:52:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-29 05:52:28,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 05:52:28,648 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:28,649 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:28,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:52:28,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:52:28,871 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:28,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:28,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-29 05:52:28,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:52:28,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721379828] [2021-10-29 05:52:28,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:28,878 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:52:28,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:52:28,879 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:52:28,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-29 05:52:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:28,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:52:28,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:52:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:29,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:52:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:29,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:52:29,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721379828] [2021-10-29 05:52:29,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721379828] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:29,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:29,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-29 05:52:29,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520797903] [2021-10-29 05:52:29,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:52:29,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:52:29,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:52:29,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:52:29,114 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) [2021-10-29 05:52:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:29,231 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-10-29 05:52:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:52:29,232 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 [2021-10-29 05:52:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:29,235 INFO L225 Difference]: With dead ends: 68 [2021-10-29 05:52:29,236 INFO L226 Difference]: Without dead ends: 59 [2021-10-29 05:52:29,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:52:29,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-29 05:52:29,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-10-29 05:52:29,250 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) [2021-10-29 05:52:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-29 05:52:29,255 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-29 05:52:29,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:29,256 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-29 05:52:29,256 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) [2021-10-29 05:52:29,257 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-29 05:52:29,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-29 05:52:29,259 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:29,259 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:29,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:52:29,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:52:29,477 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:29,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:29,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-29 05:52:29,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:52:29,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897020084] [2021-10-29 05:52:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:29,479 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:52:29,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:52:29,480 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:52:29,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-29 05:52:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:29,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-29 05:52:29,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:52:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:29,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:52:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:29,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:52:29,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897020084] [2021-10-29 05:52:29,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897020084] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:29,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:29,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-29 05:52:29,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768953770] [2021-10-29 05:52:29,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:52:29,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:52:29,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:52:29,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:52:29,763 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:29,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:29,816 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-10-29 05:52:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:52:29,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-29 05:52:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:29,817 INFO L225 Difference]: With dead ends: 52 [2021-10-29 05:52:29,817 INFO L226 Difference]: Without dead ends: 26 [2021-10-29 05:52:29,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:52:29,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-29 05:52:29,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-29 05:52:29,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:29,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-29 05:52:29,829 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2021-10-29 05:52:29,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:29,830 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-29 05:52:29,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:29,830 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-29 05:52:29,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-29 05:52:29,833 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:29,833 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:29,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-29 05:52:30,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:52:30,047 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:30,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:30,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-29 05:52:30,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:52:30,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273985677] [2021-10-29 05:52:30,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:30,048 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:52:30,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:52:30,051 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:52:30,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-29 05:52:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:30,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:52:30,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:52:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:30,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:52:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:30,277 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:52:30,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273985677] [2021-10-29 05:52:30,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273985677] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:30,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:30,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-29 05:52:30,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944930691] [2021-10-29 05:52:30,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:52:30,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:52:30,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:52:30,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:52:30,281 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:30,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:30,351 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-10-29 05:52:30,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:52:30,352 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 [2021-10-29 05:52:30,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:30,355 INFO L225 Difference]: With dead ends: 61 [2021-10-29 05:52:30,355 INFO L226 Difference]: Without dead ends: 52 [2021-10-29 05:52:30,355 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:52:30,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-29 05:52:30,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2021-10-29 05:52:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-10-29 05:52:30,366 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2021-10-29 05:52:30,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:30,367 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-10-29 05:52:30,367 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) [2021-10-29 05:52:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-10-29 05:52:30,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-29 05:52:30,368 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:30,368 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:30,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-29 05:52:30,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:52:30,581 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:30,581 INFO L85 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-29 05:52:30,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:52:30,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461710925] [2021-10-29 05:52:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:30,582 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:52:30,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:52:30,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:52:30,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-29 05:52:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:30,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-29 05:52:30,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:52:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:30,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:52:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:30,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:52:30,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461710925] [2021-10-29 05:52:30,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461710925] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:30,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:30,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-29 05:52:30,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891671967] [2021-10-29 05:52:30,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:52:30,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:52:30,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:52:30,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:52:30,960 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:30,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:30,977 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-10-29 05:52:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:52:30,979 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 [2021-10-29 05:52:30,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:30,980 INFO L225 Difference]: With dead ends: 38 [2021-10-29 05:52:30,980 INFO L226 Difference]: Without dead ends: 28 [2021-10-29 05:52:30,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:52:30,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-29 05:52:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-29 05:52:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-29 05:52:30,984 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-29 05:52:30,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:30,984 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-29 05:52:30,985 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) [2021-10-29 05:52:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-29 05:52:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-29 05:52:30,985 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:30,986 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:31,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-29 05:52:31,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:52:31,186 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:31,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:31,187 INFO L85 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-29 05:52:31,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:52:31,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403605402] [2021-10-29 05:52:31,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:31,188 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:52:31,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:52:31,189 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:52:31,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-29 05:52:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:31,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-29 05:52:31,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:52:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:31,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:52:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:31,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:52:31,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403605402] [2021-10-29 05:52:31,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403605402] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:31,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:31,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-29 05:52:31,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331687800] [2021-10-29 05:52:31,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:52:31,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:52:31,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:52:31,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:52:31,503 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:31,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:31,594 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-10-29 05:52:31,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 05:52:31,595 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 [2021-10-29 05:52:31,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:31,595 INFO L225 Difference]: With dead ends: 40 [2021-10-29 05:52:31,595 INFO L226 Difference]: Without dead ends: 37 [2021-10-29 05:52:31,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-29 05:52:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-29 05:52:31,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-29 05:52:31,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:31,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-10-29 05:52:31,600 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2021-10-29 05:52:31,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:31,600 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-10-29 05:52:31,600 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) [2021-10-29 05:52:31,600 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-10-29 05:52:31,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-29 05:52:31,601 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:31,601 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:31,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-29 05:52:31,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:52:31,810 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:31,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:31,811 INFO L85 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2021-10-29 05:52:31,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:52:31,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469704521] [2021-10-29 05:52:31,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:31,812 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:52:31,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:52:31,813 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:52:31,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-29 05:52:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:31,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-29 05:52:31,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:52:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:32,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:52:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:32,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:52:32,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469704521] [2021-10-29 05:52:32,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469704521] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:32,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:32,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-29 05:52:32,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029684897] [2021-10-29 05:52:32,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:52:32,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:52:32,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:52:32,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:52:32,117 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:32,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:32,159 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-10-29 05:52:32,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:52:32,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-29 05:52:32,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:32,162 INFO L225 Difference]: With dead ends: 43 [2021-10-29 05:52:32,162 INFO L226 Difference]: Without dead ends: 23 [2021-10-29 05:52:32,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:52:32,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-29 05:52:32,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-29 05:52:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0) internal successors, (22), 22 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:32,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2021-10-29 05:52:32,172 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2021-10-29 05:52:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:32,172 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2021-10-29 05:52:32,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:32,173 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2021-10-29 05:52:32,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-29 05:52:32,174 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:32,174 INFO L513 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] [2021-10-29 05:52:32,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-29 05:52:32,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:52:32,386 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:32,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:32,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-29 05:52:32,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:52:32,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057612956] [2021-10-29 05:52:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:32,388 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:52:32,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:52:32,389 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:52:32,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-29 05:52:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:52:32,560 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:52:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:52:32,712 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-29 05:52:32,712 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:52:32,713 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:52:32,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-29 05:52:32,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:52:32,918 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:32,921 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:52:32,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:52:32 BoogieIcfgContainer [2021-10-29 05:52:32,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:52:32,970 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:52:32,970 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:52:32,970 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:52:32,970 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:52:28" (3/4) ... [2021-10-29 05:52:32,978 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 05:52:33,022 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:52:33,023 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:52:33,024 INFO L168 Benchmark]: Toolchain (without parser) took 5908.63 ms. Allocated memory was 67.1 MB in the beginning and 92.3 MB in the end (delta: 25.2 MB). Free memory was 47.3 MB in the beginning and 71.9 MB in the end (delta: -24.6 MB). Peak memory consumption was 41.6 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:33,025 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 67.1 MB. Free memory is still 47.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:52:33,025 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.96 ms. Allocated memory is still 67.1 MB. Free memory was 47.2 MB in the beginning and 36.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:33,025 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.66 ms. Allocated memory is still 67.1 MB. Free memory was 36.4 MB in the beginning and 34.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:52:33,026 INFO L168 Benchmark]: Boogie Preprocessor took 39.08 ms. Allocated memory is still 67.1 MB. Free memory was 34.7 MB in the beginning and 33.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:33,026 INFO L168 Benchmark]: RCFGBuilder took 608.87 ms. Allocated memory is still 67.1 MB. Free memory was 33.0 MB in the beginning and 41.9 MB in the end (delta: -8.9 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:33,027 INFO L168 Benchmark]: TraceAbstraction took 4814.22 ms. Allocated memory was 67.1 MB in the beginning and 92.3 MB in the end (delta: 25.2 MB). Free memory was 41.6 MB in the beginning and 34.7 MB in the end (delta: 7.0 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:33,027 INFO L168 Benchmark]: Witness Printer took 53.22 ms. Allocated memory is still 92.3 MB. Free memory was 34.7 MB in the beginning and 71.9 MB in the end (delta: -37.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:33,030 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 67.1 MB. Free memory is still 47.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 316.96 ms. Allocated memory is still 67.1 MB. Free memory was 47.2 MB in the beginning and 36.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.66 ms. Allocated memory is still 67.1 MB. Free memory was 36.4 MB in the beginning and 34.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.08 ms. Allocated memory is still 67.1 MB. Free memory was 34.7 MB in the beginning and 33.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 608.87 ms. Allocated memory is still 67.1 MB. Free memory was 33.0 MB in the beginning and 41.9 MB in the end (delta: -8.9 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4814.22 ms. Allocated memory was 67.1 MB in the beginning and 92.3 MB in the end (delta: 25.2 MB). Free memory was 41.6 MB in the beginning and 34.7 MB in the end (delta: 7.0 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.1 GB. * Witness Printer took 53.22 ms. Allocated memory is still 92.3 MB. Free memory was 34.7 MB in the beginning and 71.9 MB in the end (delta: -37.2 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 81]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; [L46] COND FALSE !(__fpclassify_float(x) == 0) [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; [L50] COND FALSE !(__fpclassify_float(y) == 0) [L53] EXPR x > y ? x : y [L53] return x > y ? x : y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L57] __uint32_t w; [L60] ieee_float_shape_type gf_u; [L61] gf_u.value = (x) [L62] EXPR gf_u.word [L62] (w) = gf_u.word [L65] return (w & 0x80000000) != 0; [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.7s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 167 SDslu, 326 SDs, 0 SdLazy, 105 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 172 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s Time, 0.0s 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 501 SizeOfPredicates, 27 NumberOfNonLiveVariables, 413 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-29 05:52:33,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5862f82-88b0-4e1b-8101-34efeb8c0337/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...