./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 e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/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_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/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_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-e943c26 [2021-10-20 06:13:19,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 06:13:19,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 06:13:20,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 06:13:20,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 06:13:20,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 06:13:20,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 06:13:20,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 06:13:20,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 06:13:20,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 06:13:20,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 06:13:20,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 06:13:20,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 06:13:20,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 06:13:20,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 06:13:20,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 06:13:20,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 06:13:20,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 06:13:20,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 06:13:20,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 06:13:20,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 06:13:20,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 06:13:20,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 06:13:20,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 06:13:20,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 06:13:20,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 06:13:20,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 06:13:20,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 06:13:20,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 06:13:20,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 06:13:20,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 06:13:20,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 06:13:20,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 06:13:20,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 06:13:20,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 06:13:20,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 06:13:20,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 06:13:20,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 06:13:20,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 06:13:20,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 06:13:20,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 06:13:20,108 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 06:13:20,149 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 06:13:20,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 06:13:20,151 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 06:13:20,151 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 06:13:20,151 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 06:13:20,152 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 06:13:20,152 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 06:13:20,152 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 06:13:20,158 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 06:13:20,158 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 06:13:20,159 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 06:13:20,160 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 06:13:20,160 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 06:13:20,160 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 06:13:20,160 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 06:13:20,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 06:13:20,162 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 06:13:20,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 06:13:20,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 06:13:20,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 06:13:20,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 06:13:20,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 06:13:20,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 06:13:20,163 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 06:13:20,163 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 06:13:20,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 06:13:20,164 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 06:13:20,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 06:13:20,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 06:13:20,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 06:13:20,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:13:20,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 06:13:20,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 06:13:20,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 06:13:20,166 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 06:13:20,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 06:13:20,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 06:13:20,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 06:13:20,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 06:13:20,167 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_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 [2021-10-20 06:13:20,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 06:13:20,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 06:13:20,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 06:13:20,431 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 06:13:20,431 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 06:13:20,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-20 06:13:20,492 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/data/4724dfe03/bbc5f5fa1f4544e28a96a5d99ce55523/FLAG941f79317 [2021-10-20 06:13:21,046 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 06:13:21,048 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-20 06:13:21,059 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/data/4724dfe03/bbc5f5fa1f4544e28a96a5d99ce55523/FLAG941f79317 [2021-10-20 06:13:21,399 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/data/4724dfe03/bbc5f5fa1f4544e28a96a5d99ce55523 [2021-10-20 06:13:21,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 06:13:21,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 06:13:21,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 06:13:21,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 06:13:21,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 06:13:21,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:13:21" (1/1) ... [2021-10-20 06:13:21,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25c9dce9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:21, skipping insertion in model container [2021-10-20 06:13:21,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:13:21" (1/1) ... [2021-10-20 06:13:21,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 06:13:21,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 06:13:21,646 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_5598f013-6d17-47a5-92c5-7b36ce654591/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-20 06:13:21,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:13:21,658 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 06:13:21,682 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_5598f013-6d17-47a5-92c5-7b36ce654591/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-20 06:13:21,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:13:21,697 INFO L208 MainTranslator]: Completed translation [2021-10-20 06:13:21,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:21 WrapperNode [2021-10-20 06:13:21,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 06:13:21,699 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 06:13:21,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 06:13:21,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 06:13:21,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:21" (1/1) ... [2021-10-20 06:13:21,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:21" (1/1) ... [2021-10-20 06:13:21,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 06:13:21,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 06:13:21,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 06:13:21,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 06:13:21,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:21" (1/1) ... [2021-10-20 06:13:21,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:21" (1/1) ... [2021-10-20 06:13:21,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:21" (1/1) ... [2021-10-20 06:13:21,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:21" (1/1) ... [2021-10-20 06:13:21,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:21" (1/1) ... [2021-10-20 06:13:21,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:21" (1/1) ... [2021-10-20 06:13:21,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:21" (1/1) ... [2021-10-20 06:13:21,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 06:13:21,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 06:13:21,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 06:13:21,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 06:13:21,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:21" (1/1) ... [2021-10-20 06:13:21,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:13:21,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:13:21,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 06:13:21,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 06:13:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 06:13:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 06:13:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-20 06:13:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 06:13:21,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 06:13:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-20 06:13:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-20 06:13:22,491 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 06:13:22,504 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-20 06:13:22,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:13:22 BoogieIcfgContainer [2021-10-20 06:13:22,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 06:13:22,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 06:13:22,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 06:13:22,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 06:13:22,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:13:21" (1/3) ... [2021-10-20 06:13:22,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36129c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:13:22, skipping insertion in model container [2021-10-20 06:13:22,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:21" (2/3) ... [2021-10-20 06:13:22,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36129c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:13:22, skipping insertion in model container [2021-10-20 06:13:22,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:13:22" (3/3) ... [2021-10-20 06:13:22,516 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2021-10-20 06:13:22,521 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 06:13:22,522 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 06:13:22,571 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 06:13:22,578 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-20 06:13:22,579 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-20 06:13:22,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:13:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-20 06:13:22,599 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:13:22,599 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:13:22,600 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:13:22,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:13:22,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1433219361, now seen corresponding path program 1 times [2021-10-20 06:13:22,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:13:22,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347995785] [2021-10-20 06:13:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:13:22,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:13:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:13:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:22,852 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:13:22,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347995785] [2021-10-20 06:13:22,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347995785] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:13:22,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:13:22,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 06:13:22,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517032823] [2021-10-20 06:13:22,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-20 06:13:22,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:13:22,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-20 06:13:22,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 06:13:22,884 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:13:22,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:13:22,907 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2021-10-20 06:13:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-20 06:13:22,908 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-20 06:13:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:13:22,920 INFO L225 Difference]: With dead ends: 35 [2021-10-20 06:13:22,920 INFO L226 Difference]: Without dead ends: 16 [2021-10-20 06:13:22,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 06:13:22,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-20 06:13:22,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-20 06:13:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:13:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-20 06:13:22,960 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-10-20 06:13:22,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:13:22,960 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-20 06:13:22,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:13:22,961 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-20 06:13:22,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 06:13:22,961 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:13:22,962 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:13:22,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 06:13:22,962 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:13:22,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:13:22,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2131701560, now seen corresponding path program 1 times [2021-10-20 06:13:22,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:13:22,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801737778] [2021-10-20 06:13:22,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:13:22,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:13:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 06:13:23,013 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-20 06:13:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 06:13:23,071 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-20 06:13:23,072 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-20 06:13:23,073 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:13:23,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 06:13:23,082 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 06:13:23,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:13:23 BoogieIcfgContainer [2021-10-20 06:13:23,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 06:13:23,106 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 06:13:23,106 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 06:13:23,107 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 06:13:23,107 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:13:22" (3/4) ... [2021-10-20 06:13:23,110 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-20 06:13:23,111 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 06:13:23,113 INFO L168 Benchmark]: Toolchain (without parser) took 1709.18 ms. Allocated memory is still 119.5 MB. Free memory was 88.0 MB in the beginning and 80.6 MB in the end (delta: 7.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-20 06:13:23,113 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 88.1 MB. Free memory was 47.8 MB in the beginning and 47.7 MB in the end (delta: 44.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:13:23,114 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.54 ms. Allocated memory is still 119.5 MB. Free memory was 87.8 MB in the beginning and 94.2 MB in the end (delta: -6.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-20 06:13:23,115 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.21 ms. Allocated memory is still 119.5 MB. Free memory was 94.2 MB in the beginning and 92.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:13:23,115 INFO L168 Benchmark]: Boogie Preprocessor took 29.83 ms. Allocated memory is still 119.5 MB. Free memory was 92.6 MB in the beginning and 91.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:13:23,116 INFO L168 Benchmark]: RCFGBuilder took 717.40 ms. Allocated memory is still 119.5 MB. Free memory was 91.1 MB in the beginning and 68.1 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:13:23,117 INFO L168 Benchmark]: TraceAbstraction took 597.89 ms. Allocated memory is still 119.5 MB. Free memory was 67.6 MB in the beginning and 81.5 MB in the end (delta: -13.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:13:23,117 INFO L168 Benchmark]: Witness Printer took 4.44 ms. Allocated memory is still 119.5 MB. Free memory was 81.5 MB in the beginning and 80.6 MB in the end (delta: 885.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:13:23,121 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 88.1 MB. Free memory was 47.8 MB in the beginning and 47.7 MB in the end (delta: 44.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 287.54 ms. Allocated memory is still 119.5 MB. Free memory was 87.8 MB in the beginning and 94.2 MB in the end (delta: -6.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.21 ms. Allocated memory is still 119.5 MB. Free memory was 94.2 MB in the beginning and 92.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.83 ms. Allocated memory is still 119.5 MB. Free memory was 92.6 MB in the beginning and 91.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 717.40 ms. Allocated memory is still 119.5 MB. Free memory was 91.1 MB in the beginning and 68.1 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 597.89 ms. Allocated memory is still 119.5 MB. Free memory was 67.6 MB in the beginning and 81.5 MB in the end (delta: -13.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.44 ms. Allocated memory is still 119.5 MB. Free memory was 81.5 MB in the beginning and 80.6 MB in the end (delta: 885.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 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: 510.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 9.8ms, AutomataDifference: 60.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 21.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.2ms SsaConstructionTime, 69.7ms SatisfiabilityAnalysisTime, 135.8ms InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-20 06:13:23,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 06:13:25,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 06:13:25,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 06:13:25,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 06:13:25,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 06:13:25,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 06:13:25,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 06:13:25,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 06:13:25,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 06:13:25,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 06:13:25,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 06:13:25,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 06:13:25,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 06:13:25,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 06:13:25,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 06:13:25,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 06:13:25,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 06:13:25,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 06:13:25,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 06:13:25,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 06:13:25,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 06:13:25,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 06:13:25,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 06:13:25,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 06:13:25,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 06:13:25,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 06:13:25,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 06:13:25,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 06:13:25,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 06:13:25,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 06:13:25,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 06:13:25,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 06:13:25,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 06:13:25,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 06:13:25,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 06:13:25,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 06:13:25,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 06:13:25,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 06:13:25,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 06:13:25,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 06:13:25,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 06:13:25,850 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-20 06:13:25,897 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 06:13:25,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 06:13:25,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 06:13:25,899 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 06:13:25,899 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 06:13:25,900 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 06:13:25,900 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 06:13:25,900 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 06:13:25,901 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 06:13:25,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 06:13:25,904 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 06:13:25,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 06:13:25,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 06:13:25,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 06:13:25,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 06:13:25,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 06:13:25,905 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 06:13:25,905 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-20 06:13:25,905 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-20 06:13:25,906 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 06:13:25,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 06:13:25,906 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 06:13:25,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 06:13:25,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 06:13:25,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-20 06:13:25,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 06:13:25,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:13:25,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 06:13:25,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 06:13:25,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 06:13:25,908 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-20 06:13:25,909 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-20 06:13:25,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 06:13:25,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 06:13:25,910 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 06:13:25,910 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_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 [2021-10-20 06:13:26,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 06:13:26,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 06:13:26,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 06:13:26,277 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 06:13:26,278 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 06:13:26,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-20 06:13:26,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/data/98e89b87a/7eda0819404a4a3b950f9658d311a130/FLAG281b305b7 [2021-10-20 06:13:26,898 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 06:13:26,900 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-20 06:13:26,909 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/data/98e89b87a/7eda0819404a4a3b950f9658d311a130/FLAG281b305b7 [2021-10-20 06:13:27,255 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/data/98e89b87a/7eda0819404a4a3b950f9658d311a130 [2021-10-20 06:13:27,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 06:13:27,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 06:13:27,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 06:13:27,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 06:13:27,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 06:13:27,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:13:27" (1/1) ... [2021-10-20 06:13:27,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e457355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:27, skipping insertion in model container [2021-10-20 06:13:27,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:13:27" (1/1) ... [2021-10-20 06:13:27,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 06:13:27,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 06:13:27,476 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_5598f013-6d17-47a5-92c5-7b36ce654591/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-20 06:13:27,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:13:27,492 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 06:13:27,515 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_5598f013-6d17-47a5-92c5-7b36ce654591/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-20 06:13:27,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:13:27,532 INFO L208 MainTranslator]: Completed translation [2021-10-20 06:13:27,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:27 WrapperNode [2021-10-20 06:13:27,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 06:13:27,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 06:13:27,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 06:13:27,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 06:13:27,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:27" (1/1) ... [2021-10-20 06:13:27,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:27" (1/1) ... [2021-10-20 06:13:27,575 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 06:13:27,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 06:13:27,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 06:13:27,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 06:13:27,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:27" (1/1) ... [2021-10-20 06:13:27,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:27" (1/1) ... [2021-10-20 06:13:27,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:27" (1/1) ... [2021-10-20 06:13:27,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:27" (1/1) ... [2021-10-20 06:13:27,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:27" (1/1) ... [2021-10-20 06:13:27,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:27" (1/1) ... [2021-10-20 06:13:27,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:27" (1/1) ... [2021-10-20 06:13:27,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 06:13:27,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 06:13:27,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 06:13:27,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 06:13:27,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:27" (1/1) ... [2021-10-20 06:13:27,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:13:27,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:13:27,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 06:13:27,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 06:13:27,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-20 06:13:27,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 06:13:27,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-20 06:13:27,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 06:13:27,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 06:13:27,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-10-20 06:13:27,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-20 06:13:28,227 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 06:13:28,227 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-20 06:13:28,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:13:28 BoogieIcfgContainer [2021-10-20 06:13:28,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 06:13:28,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 06:13:28,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 06:13:28,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 06:13:28,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:13:27" (1/3) ... [2021-10-20 06:13:28,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ced55e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:13:28, skipping insertion in model container [2021-10-20 06:13:28,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:13:27" (2/3) ... [2021-10-20 06:13:28,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ced55e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:13:28, skipping insertion in model container [2021-10-20 06:13:28,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:13:28" (3/3) ... [2021-10-20 06:13:28,237 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2021-10-20 06:13:28,244 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 06:13:28,244 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 06:13:28,313 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 06:13:28,324 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-20 06:13:28,324 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-20 06:13:28,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:13:28,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-20 06:13:28,381 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:13:28,382 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:13:28,382 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:13:28,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:13:28,389 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-20 06:13:28,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:13:28,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341354338] [2021-10-20 06:13:28,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:13:28,402 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:13:28,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:13:28,408 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:13:28,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-20 06:13:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:13:28,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-20 06:13:28,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:13:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:28,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:13:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:28,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:13:28,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341354338] [2021-10-20 06:13:28,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341354338] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:13:28,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:13:28,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-20 06:13:28,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637176918] [2021-10-20 06:13:28,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-20 06:13:28,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:13:28,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-20 06:13:28,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 06:13:28,645 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:13:28,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:13:28,663 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-20 06:13:28,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-20 06:13:28,665 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-20 06:13:28,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:13:28,674 INFO L225 Difference]: With dead ends: 62 [2021-10-20 06:13:28,675 INFO L226 Difference]: Without dead ends: 29 [2021-10-20 06:13:28,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 06:13:28,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-20 06:13:28,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-20 06:13:28,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:13:28,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-20 06:13:28,710 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-20 06:13:28,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:13:28,711 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-20 06:13:28,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:13:28,711 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-20 06:13:28,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-20 06:13:28,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:13:28,713 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:13:28,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-20 06:13:28,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:13:28,926 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:13:28,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:13:28,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-20 06:13:28,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:13:28,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280813192] [2021-10-20 06:13:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:13:28,928 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:13:28,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:13:28,933 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:13:28,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-20 06:13:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:13:29,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-20 06:13:29,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:13:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:29,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:13:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:29,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:13:29,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280813192] [2021-10-20 06:13:29,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280813192] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:13:29,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:13:29,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-20 06:13:29,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032111917] [2021-10-20 06:13:29,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-20 06:13:29,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:13:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-20 06:13:29,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-20 06:13:29,128 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:13:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:13:29,238 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-10-20 06:13:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-20 06:13:29,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-20 06:13:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:13:29,240 INFO L225 Difference]: With dead ends: 68 [2021-10-20 06:13:29,240 INFO L226 Difference]: Without dead ends: 59 [2021-10-20 06:13:29,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-20 06:13:29,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-20 06:13:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-10-20 06:13:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:13:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-20 06:13:29,249 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-20 06:13:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:13:29,249 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-20 06:13:29,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:13:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-20 06:13:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-20 06:13:29,250 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:13:29,250 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:13:29,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-20 06:13:29,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:13:29,464 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:13:29,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:13:29,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-20 06:13:29,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:13:29,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908698984] [2021-10-20 06:13:29,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:13:29,466 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:13:29,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:13:29,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:13:29,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-20 06:13:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:13:29,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-20 06:13:29,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:13:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:29,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:13:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:29,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:13:29,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908698984] [2021-10-20 06:13:29,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908698984] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:13:29,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:13:29,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-20 06:13:29,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031730099] [2021-10-20 06:13:29,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:13:29,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:13:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:13:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:13:29,713 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) [2021-10-20 06:13:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:13:29,760 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-10-20 06:13:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 06:13:29,760 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 [2021-10-20 06:13:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:13:29,761 INFO L225 Difference]: With dead ends: 52 [2021-10-20 06:13:29,761 INFO L226 Difference]: Without dead ends: 26 [2021-10-20 06:13:29,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:13:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-20 06:13:29,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-20 06:13:29,766 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) [2021-10-20 06:13:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-20 06:13:29,767 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2021-10-20 06:13:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:13:29,767 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-20 06:13:29,767 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) [2021-10-20 06:13:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-20 06:13:29,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-20 06:13:29,768 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:13:29,769 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:13:29,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-20 06:13:29,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:13:29,981 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:13:29,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:13:29,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-20 06:13:29,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:13:29,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675242463] [2021-10-20 06:13:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:13:29,983 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:13:29,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:13:29,985 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:13:30,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-20 06:13:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:13:30,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-20 06:13:30,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:13:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:30,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:13:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:30,253 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:13:30,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675242463] [2021-10-20 06:13:30,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675242463] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:13:30,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:13:30,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-20 06:13:30,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662345959] [2021-10-20 06:13:30,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-20 06:13:30,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:13:30,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-20 06:13:30,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-20 06:13:30,256 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) [2021-10-20 06:13:30,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:13:30,340 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-10-20 06:13:30,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-20 06:13:30,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-20 06:13:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:13:30,347 INFO L225 Difference]: With dead ends: 61 [2021-10-20 06:13:30,347 INFO L226 Difference]: Without dead ends: 52 [2021-10-20 06:13:30,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-20 06:13:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-20 06:13:30,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2021-10-20 06:13:30,353 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) [2021-10-20 06:13:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-10-20 06:13:30,354 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2021-10-20 06:13:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:13:30,355 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-10-20 06:13:30,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:13:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-10-20 06:13:30,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-20 06:13:30,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:13:30,356 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:13:30,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-20 06:13:30,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:13:30,564 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:13:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:13:30,564 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-20 06:13:30,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:13:30,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990610863] [2021-10-20 06:13:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:13:30,565 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:13:30,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:13:30,568 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:13:30,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-20 06:13:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:13:30,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-20 06:13:30,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:13:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:30,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:13:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:30,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:13:30,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990610863] [2021-10-20 06:13:30,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990610863] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:13:30,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:13:30,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-20 06:13:30,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751411931] [2021-10-20 06:13:30,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:13:30,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:13:30,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:13:30,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:13:30,965 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) [2021-10-20 06:13:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:13:30,978 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-10-20 06:13:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:13:30,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-20 06:13:30,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:13:30,982 INFO L225 Difference]: With dead ends: 38 [2021-10-20 06:13:30,982 INFO L226 Difference]: Without dead ends: 28 [2021-10-20 06:13:30,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:13:30,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-20 06:13:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-20 06:13:30,987 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) [2021-10-20 06:13:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-20 06:13:30,987 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-20 06:13:30,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:13:30,988 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-20 06:13:30,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:13:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-20 06:13:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-20 06:13:30,989 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:13:30,989 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:13:31,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-20 06:13:31,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:13:31,201 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:13:31,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:13:31,201 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-20 06:13:31,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:13:31,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140987656] [2021-10-20 06:13:31,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:13:31,202 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:13:31,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:13:31,206 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:13:31,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-20 06:13:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:13:31,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-20 06:13:31,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:13:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:31,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:13:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:31,538 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:13:31,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140987656] [2021-10-20 06:13:31,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140987656] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:13:31,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:13:31,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-20 06:13:31,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917386976] [2021-10-20 06:13:31,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 06:13:31,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:13:31,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 06:13:31,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-20 06:13:31,547 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) [2021-10-20 06:13:31,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:13:31,651 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-10-20 06:13:31,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-20 06:13:31,651 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-20 06:13:31,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:13:31,652 INFO L225 Difference]: With dead ends: 40 [2021-10-20 06:13:31,653 INFO L226 Difference]: Without dead ends: 37 [2021-10-20 06:13:31,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-20 06:13:31,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-20 06:13:31,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-20 06:13:31,657 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) [2021-10-20 06:13:31,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-10-20 06:13:31,658 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2021-10-20 06:13:31,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:13:31,658 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-10-20 06:13:31,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:13:31,659 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-10-20 06:13:31,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-20 06:13:31,659 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:13:31,660 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:13:31,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-20 06:13:31,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:13:31,877 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:13:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:13:31,877 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2021-10-20 06:13:31,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:13:31,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552203173] [2021-10-20 06:13:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:13:31,878 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:13:31,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:13:31,879 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:13:31,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-20 06:13:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:13:32,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-20 06:13:32,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:13:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:32,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:13:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:13:32,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:13:32,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552203173] [2021-10-20 06:13:32,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552203173] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:13:32,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:13:32,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-20 06:13:32,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134975452] [2021-10-20 06:13:32,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-20 06:13:32,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:13:32,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-20 06:13:32,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:13:32,229 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) [2021-10-20 06:13:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:13:32,275 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-10-20 06:13:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 06:13:32,280 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 [2021-10-20 06:13:32,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:13:32,281 INFO L225 Difference]: With dead ends: 43 [2021-10-20 06:13:32,281 INFO L226 Difference]: Without dead ends: 23 [2021-10-20 06:13:32,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-20 06:13:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-20 06:13:32,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-20 06:13:32,284 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) [2021-10-20 06:13:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2021-10-20 06:13:32,285 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2021-10-20 06:13:32,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:13:32,285 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2021-10-20 06:13:32,286 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) [2021-10-20 06:13:32,286 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2021-10-20 06:13:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-20 06:13:32,286 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:13:32,287 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:13:32,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-20 06:13:32,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:13:32,487 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:13:32,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:13:32,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-20 06:13:32,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:13:32,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749788821] [2021-10-20 06:13:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:13:32,489 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:13:32,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:13:32,490 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:13:32,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-20 06:13:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 06:13:32,664 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-20 06:13:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 06:13:32,795 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-20 06:13:32,795 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-20 06:13:32,796 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:13:32,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-20 06:13:33,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:13:33,010 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 06:13:33,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:13:33 BoogieIcfgContainer [2021-10-20 06:13:33,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 06:13:33,046 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 06:13:33,046 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 06:13:33,046 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 06:13:33,047 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:13:28" (3/4) ... [2021-10-20 06:13:33,052 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-20 06:13:33,113 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 06:13:33,116 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 06:13:33,118 INFO L168 Benchmark]: Toolchain (without parser) took 5851.22 ms. Allocated memory was 50.3 MB in the beginning and 67.1 MB in the end (delta: 16.8 MB). Free memory was 26.7 MB in the beginning and 40.6 MB in the end (delta: -13.9 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-10-20 06:13:33,120 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 50.3 MB. Free memory was 30.4 MB in the beginning and 30.3 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:13:33,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.75 ms. Allocated memory is still 50.3 MB. Free memory was 26.4 MB in the beginning and 27.0 MB in the end (delta: -612.8 kB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2021-10-20 06:13:33,122 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.01 ms. Allocated memory is still 50.3 MB. Free memory was 27.0 MB in the beginning and 25.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:13:33,123 INFO L168 Benchmark]: Boogie Preprocessor took 31.98 ms. Allocated memory is still 50.3 MB. Free memory was 25.2 MB in the beginning and 23.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:13:33,124 INFO L168 Benchmark]: RCFGBuilder took 620.54 ms. Allocated memory was 50.3 MB in the beginning and 67.1 MB in the end (delta: 16.8 MB). Free memory was 23.7 MB in the beginning and 38.7 MB in the end (delta: -15.0 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2021-10-20 06:13:33,124 INFO L168 Benchmark]: TraceAbstraction took 4814.75 ms. Allocated memory is still 67.1 MB. Free memory was 38.2 MB in the beginning and 43.5 MB in the end (delta: -5.3 MB). Peak memory consumption was 15.4 MB. Max. memory is 16.1 GB. [2021-10-20 06:13:33,125 INFO L168 Benchmark]: Witness Printer took 71.02 ms. Allocated memory is still 67.1 MB. Free memory was 43.5 MB in the beginning and 40.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-20 06:13:33,127 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 50.3 MB. Free memory was 30.4 MB in the beginning and 30.3 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 262.75 ms. Allocated memory is still 50.3 MB. Free memory was 26.4 MB in the beginning and 27.0 MB in the end (delta: -612.8 kB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.01 ms. Allocated memory is still 50.3 MB. Free memory was 27.0 MB in the beginning and 25.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.98 ms. Allocated memory is still 50.3 MB. Free memory was 25.2 MB in the beginning and 23.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 620.54 ms. Allocated memory was 50.3 MB in the beginning and 67.1 MB in the end (delta: 16.8 MB). Free memory was 23.7 MB in the beginning and 38.7 MB in the end (delta: -15.0 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4814.75 ms. Allocated memory is still 67.1 MB. Free memory was 38.2 MB in the beginning and 43.5 MB in the end (delta: -5.3 MB). Peak memory consumption was 15.4 MB. Max. memory is 16.1 GB. * Witness Printer took 71.02 ms. Allocated memory is still 67.1 MB. Free memory was 43.5 MB in the beginning and 40.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 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: 4697.4ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 50.5ms, AutomataDifference: 491.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 222 SDtfs, 167 SDslu, 326 SDs, 0 SdLazy, 105 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 194.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 172 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 264.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 49.2ms AutomataMinimizationTime, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 105.6ms SsaConstructionTime, 350.0ms SatisfiabilityAnalysisTime, 1246.0ms 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! [2021-10-20 06:13:33,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5598f013-6d17-47a5-92c5-7b36ce654591/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...