./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 38561929b5142acce65cab4da64e7c4ae5f17524 ....................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 38561929b5142acce65cab4da64e7c4ae5f17524 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:31:59,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:31:59,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:31:59,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:31:59,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:31:59,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:31:59,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:31:59,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:31:59,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:31:59,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:31:59,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:31:59,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:31:59,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:31:59,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:31:59,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:31:59,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:31:59,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:31:59,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:31:59,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:31:59,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:31:59,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:31:59,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:31:59,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:31:59,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:31:59,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:31:59,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:31:59,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:31:59,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:31:59,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:31:59,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:31:59,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:31:59,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:31:59,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:31:59,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:31:59,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:31:59,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:31:59,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:31:59,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:31:59,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:31:59,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:31:59,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:31:59,975 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-03 12:32:00,010 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:32:00,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:32:00,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:32:00,012 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:32:00,012 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:32:00,012 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:32:00,013 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:32:00,013 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:32:00,013 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:32:00,013 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:32:00,014 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:32:00,014 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:32:00,014 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:32:00,014 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:32:00,015 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:32:00,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:32:00,016 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:32:00,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:32:00,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:32:00,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:32:00,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:32:00,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:32:00,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:32:00,017 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:32:00,018 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:32:00,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:32:00,018 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:32:00,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:32:00,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:32:00,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:32:00,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:32:00,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:32:00,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:32:00,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:32:00,020 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:32:00,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:32:00,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:32:00,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:32:00,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:32:00,021 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2020-12-03 12:32:00,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:32:00,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:32:00,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:32:00,289 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:32:00,289 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:32:00,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-12-03 12:32:00,354 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/data/12faa1ba6/4c202b889b124e2db6730e00a999491c/FLAG7ddafdff9 [2020-12-03 12:32:00,815 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:32:00,816 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-12-03 12:32:00,822 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/data/12faa1ba6/4c202b889b124e2db6730e00a999491c/FLAG7ddafdff9 [2020-12-03 12:32:01,207 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/data/12faa1ba6/4c202b889b124e2db6730e00a999491c [2020-12-03 12:32:01,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:32:01,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:32:01,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:32:01,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:32:01,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:32:01,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:32:01" (1/1) ... [2020-12-03 12:32:01,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@943c538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:01, skipping insertion in model container [2020-12-03 12:32:01,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:32:01" (1/1) ... [2020-12-03 12:32:01,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:32:01,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:32:01,449 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2020-12-03 12:32:01,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:32:01,460 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:32:01,483 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2020-12-03 12:32:01,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:32:01,499 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:32:01,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:01 WrapperNode [2020-12-03 12:32:01,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:32:01,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:32:01,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:32:01,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:32:01,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:01" (1/1) ... [2020-12-03 12:32:01,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:01" (1/1) ... [2020-12-03 12:32:01,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:32:01,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:32:01,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:32:01,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:32:01,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:01" (1/1) ... [2020-12-03 12:32:01,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:01" (1/1) ... [2020-12-03 12:32:01,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:01" (1/1) ... [2020-12-03 12:32:01,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:01" (1/1) ... [2020-12-03 12:32:01,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:01" (1/1) ... [2020-12-03 12:32:01,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:01" (1/1) ... [2020-12-03 12:32:01,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:01" (1/1) ... [2020-12-03 12:32:01,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:32:01,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:32:01,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:32:01,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:32:01,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:32:01,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 12:32:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:32:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-03 12:32:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:32:01,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:32:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-03 12:32:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-03 12:32:02,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:32:02,277 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-03 12:32:02,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:32:02 BoogieIcfgContainer [2020-12-03 12:32:02,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:32:02,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:32:02,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:32:02,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:32:02,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:32:01" (1/3) ... [2020-12-03 12:32:02,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66bf3659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:32:02, skipping insertion in model container [2020-12-03 12:32:02,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:01" (2/3) ... [2020-12-03 12:32:02,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66bf3659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:32:02, skipping insertion in model container [2020-12-03 12:32:02,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:32:02" (3/3) ... [2020-12-03 12:32:02,292 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-12-03 12:32:02,313 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:32:02,317 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-03 12:32:02,329 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-03 12:32:02,354 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:32:02,354 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:32:02,354 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:32:02,355 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:32:02,355 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:32:02,355 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:32:02,355 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:32:02,355 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:32:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-03 12:32:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 12:32:02,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:02,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:32:02,375 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:32:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1433219361, now seen corresponding path program 1 times [2020-12-03 12:32:02,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:02,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025229049] [2020-12-03 12:32:02,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:02,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025229049] [2020-12-03 12:32:02,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:02,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:32:02,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096059230] [2020-12-03 12:32:02,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 12:32:02,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:02,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 12:32:02,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 12:32:02,581 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-03 12:32:02,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:02,601 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2020-12-03 12:32:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 12:32:02,603 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-03 12:32:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:02,621 INFO L225 Difference]: With dead ends: 35 [2020-12-03 12:32:02,625 INFO L226 Difference]: Without dead ends: 16 [2020-12-03 12:32:02,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 12:32:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-03 12:32:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-03 12:32:02,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-03 12:32:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-03 12:32:02,668 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2020-12-03 12:32:02,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:02,668 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-03 12:32:02,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 12:32:02,669 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-03 12:32:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-03 12:32:02,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:02,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:32:02,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:32:02,670 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:32:02,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:02,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2131701560, now seen corresponding path program 1 times [2020-12-03 12:32:02,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:02,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604090046] [2020-12-03 12:32:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:32:02,761 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:32:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:32:02,827 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:32:02,855 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-03 12:32:02,855 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:32:02,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:32:02,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:32:02 BoogieIcfgContainer [2020-12-03 12:32:02,892 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:32:02,893 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:32:02,893 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:32:02,894 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:32:02,895 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:32:02" (3/4) ... [2020-12-03 12:32:02,897 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-03 12:32:02,897 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:32:02,899 INFO L168 Benchmark]: Toolchain (without parser) took 1687.19 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 74.6 MB in the beginning and 67.8 MB in the end (delta: 6.8 MB). Peak memory consumption was 28.0 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:02,900 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 100.7 MB. Free memory was 57.4 MB in the beginning and 57.3 MB in the end (delta: 44.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:32:02,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.07 ms. Allocated memory is still 100.7 MB. Free memory was 74.3 MB in the beginning and 77.8 MB in the end (delta: -3.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:02,902 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.95 ms. Allocated memory is still 100.7 MB. Free memory was 77.8 MB in the beginning and 75.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:02,902 INFO L168 Benchmark]: Boogie Preprocessor took 27.64 ms. Allocated memory is still 100.7 MB. Free memory was 75.9 MB in the beginning and 74.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:02,903 INFO L168 Benchmark]: RCFGBuilder took 710.61 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 74.5 MB in the beginning and 90.8 MB in the end (delta: -16.3 MB). Peak memory consumption was 31.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:02,903 INFO L168 Benchmark]: TraceAbstraction took 610.85 ms. Allocated memory is still 121.6 MB. Free memory was 90.3 MB in the beginning and 68.3 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:02,904 INFO L168 Benchmark]: Witness Printer took 3.93 ms. Allocated memory is still 121.6 MB. Free memory was 68.3 MB in the beginning and 67.8 MB in the end (delta: 512.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:32:02,907 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 100.7 MB. Free memory was 57.4 MB in the beginning and 57.3 MB in the end (delta: 44.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 284.07 ms. Allocated memory is still 100.7 MB. Free memory was 74.3 MB in the beginning and 77.8 MB in the end (delta: -3.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.95 ms. Allocated memory is still 100.7 MB. Free memory was 77.8 MB in the beginning and 75.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.64 ms. Allocated memory is still 100.7 MB. Free memory was 75.9 MB in the beginning and 74.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 710.61 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 74.5 MB in the beginning and 90.8 MB in the end (delta: -16.3 MB). Peak memory consumption was 31.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 610.85 ms. Allocated memory is still 121.6 MB. Free memory was 90.3 MB in the beginning and 68.3 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Witness Printer took 3.93 ms. Allocated memory is still 121.6 MB. Free memory was 68.3 MB in the beginning and 67.8 MB in the end (delta: 512.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 72]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 71, overapproximation of someUnaryFLOAToperation at line 66. Possible FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:32:05,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:32:05,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:32:05,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:32:05,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:32:05,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:32:05,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:32:05,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:32:05,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:32:05,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:32:05,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:32:05,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:32:05,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:32:05,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:32:05,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:32:05,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:32:05,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:32:05,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:32:05,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:32:05,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:32:05,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:32:05,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:32:05,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:32:05,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:32:05,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:32:05,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:32:05,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:32:05,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:32:05,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:32:05,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:32:05,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:32:05,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:32:05,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:32:05,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:32:05,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:32:05,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:32:05,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:32:05,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:32:05,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:32:05,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:32:05,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:32:05,515 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-03 12:32:05,542 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:32:05,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:32:05,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:32:05,544 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:32:05,545 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:32:05,545 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:32:05,546 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:32:05,546 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:32:05,546 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:32:05,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:32:05,548 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:32:05,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:32:05,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:32:05,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:32:05,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:32:05,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:32:05,550 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:32:05,551 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-03 12:32:05,551 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-03 12:32:05,551 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:32:05,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:32:05,551 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:32:05,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:32:05,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:32:05,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 12:32:05,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:32:05,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:32:05,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:32:05,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:32:05,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:32:05,554 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-03 12:32:05,554 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-03 12:32:05,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:32:05,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:32:05,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:32:05,555 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2020-12-03 12:32:05,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:32:05,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:32:05,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:32:05,978 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:32:05,979 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:32:05,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-12-03 12:32:06,059 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/data/fa83683a4/95c74299bbc34918976902dd8cd1fad8/FLAG3bb40fcb9 [2020-12-03 12:32:06,639 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:32:06,641 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-12-03 12:32:06,649 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/data/fa83683a4/95c74299bbc34918976902dd8cd1fad8/FLAG3bb40fcb9 [2020-12-03 12:32:06,997 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/data/fa83683a4/95c74299bbc34918976902dd8cd1fad8 [2020-12-03 12:32:07,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:32:07,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:32:07,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:32:07,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:32:07,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:32:07,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:32:06" (1/1) ... [2020-12-03 12:32:07,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416d1711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:07, skipping insertion in model container [2020-12-03 12:32:07,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:32:06" (1/1) ... [2020-12-03 12:32:07,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:32:07,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:32:07,251 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2020-12-03 12:32:07,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:32:07,267 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:32:07,302 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2020-12-03 12:32:07,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:32:07,337 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:32:07,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:07 WrapperNode [2020-12-03 12:32:07,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:32:07,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:32:07,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:32:07,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:32:07,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:07" (1/1) ... [2020-12-03 12:32:07,357 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:07" (1/1) ... [2020-12-03 12:32:07,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:32:07,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:32:07,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:32:07,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:32:07,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:07" (1/1) ... [2020-12-03 12:32:07,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:07" (1/1) ... [2020-12-03 12:32:07,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:07" (1/1) ... [2020-12-03 12:32:07,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:07" (1/1) ... [2020-12-03 12:32:07,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:07" (1/1) ... [2020-12-03 12:32:07,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:07" (1/1) ... [2020-12-03 12:32:07,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:07" (1/1) ... [2020-12-03 12:32:07,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:32:07,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:32:07,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:32:07,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:32:07,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:32:07,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-03 12:32:07,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:32:07,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-03 12:32:07,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:32:07,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:32:07,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-12-03 12:32:07,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-03 12:32:07,869 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:32:07,869 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-03 12:32:07,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:32:07 BoogieIcfgContainer [2020-12-03 12:32:07,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:32:07,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:32:07,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:32:07,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:32:07,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:32:06" (1/3) ... [2020-12-03 12:32:07,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2388e115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:32:07, skipping insertion in model container [2020-12-03 12:32:07,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:07" (2/3) ... [2020-12-03 12:32:07,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2388e115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:32:07, skipping insertion in model container [2020-12-03 12:32:07,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:32:07" (3/3) ... [2020-12-03 12:32:07,885 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-12-03 12:32:07,899 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:32:07,902 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-03 12:32:07,913 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-03 12:32:07,952 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:32:07,953 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:32:07,953 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:32:07,953 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:32:07,953 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:32:07,953 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:32:07,953 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:32:07,953 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:32:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-03 12:32:07,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:32:07,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:07,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:32:07,976 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:32:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:07,982 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-12-03 12:32:07,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:32:07,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646043018] [2020-12-03 12:32:07,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-03 12:32:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:08,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-03 12:32:08,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:08,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:32:08,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646043018] [2020-12-03 12:32:08,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:08,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:32:08,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562219311] [2020-12-03 12:32:08,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 12:32:08,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:32:08,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 12:32:08,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 12:32:08,212 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-03 12:32:08,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:08,239 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2020-12-03 12:32:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 12:32:08,241 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-03 12:32:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:08,250 INFO L225 Difference]: With dead ends: 62 [2020-12-03 12:32:08,250 INFO L226 Difference]: Without dead ends: 29 [2020-12-03 12:32:08,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 12:32:08,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-03 12:32:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-03 12:32:08,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-03 12:32:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-12-03 12:32:08,292 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-12-03 12:32:08,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:08,292 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-12-03 12:32:08,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 12:32:08,293 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-12-03 12:32:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-03 12:32:08,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:08,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:32:08,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-03 12:32:08,511 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:32:08,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:08,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-12-03 12:32:08,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:32:08,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24793134] [2020-12-03 12:32:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-03 12:32:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:08,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-03 12:32:08,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:08,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:32:08,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24793134] [2020-12-03 12:32:08,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:08,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:32:08,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901468583] [2020-12-03 12:32:08,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:32:08,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:32:08,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:32:08,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:32:08,627 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-12-03 12:32:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:08,688 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-03 12:32:08,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:32:08,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-03 12:32:08,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:08,690 INFO L225 Difference]: With dead ends: 53 [2020-12-03 12:32:08,690 INFO L226 Difference]: Without dead ends: 44 [2020-12-03 12:32:08,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:32:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-03 12:32:08,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-12-03 12:32:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-03 12:32:08,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-03 12:32:08,698 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-12-03 12:32:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:08,699 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-03 12:32:08,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:32:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-03 12:32:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-03 12:32:08,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:08,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:32:08,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-03 12:32:08,913 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:32:08,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:08,913 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-12-03 12:32:08,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:32:08,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557770747] [2020-12-03 12:32:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-03 12:32:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:08,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-03 12:32:08,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:09,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:32:09,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557770747] [2020-12-03 12:32:09,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:09,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:32:09,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668399802] [2020-12-03 12:32:09,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:32:09,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:32:09,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:32:09,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:32:09,060 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-03 12:32:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:09,110 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-12-03 12:32:09,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:32:09,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-03 12:32:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:09,111 INFO L225 Difference]: With dead ends: 50 [2020-12-03 12:32:09,112 INFO L226 Difference]: Without dead ends: 26 [2020-12-03 12:32:09,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:32:09,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-03 12:32:09,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-03 12:32:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-03 12:32:09,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-03 12:32:09,117 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 12 [2020-12-03 12:32:09,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:09,117 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-03 12:32:09,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:32:09,117 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-03 12:32:09,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-03 12:32:09,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:09,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:32:09,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-03 12:32:09,334 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:32:09,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:09,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-12-03 12:32:09,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:32:09,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173543950] [2020-12-03 12:32:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-03 12:32:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:09,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-03 12:32:09,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:09,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:32:09,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173543950] [2020-12-03 12:32:09,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:09,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:32:09,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798190595] [2020-12-03 12:32:09,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:32:09,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:32:09,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:32:09,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:32:09,454 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2020-12-03 12:32:09,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:09,514 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-12-03 12:32:09,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:32:09,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-03 12:32:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:09,516 INFO L225 Difference]: With dead ends: 48 [2020-12-03 12:32:09,516 INFO L226 Difference]: Without dead ends: 39 [2020-12-03 12:32:09,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:32:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-03 12:32:09,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2020-12-03 12:32:09,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-03 12:32:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-03 12:32:09,525 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-12-03 12:32:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:09,525 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-03 12:32:09,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:32:09,528 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-03 12:32:09,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-03 12:32:09,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:09,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:32:09,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-03 12:32:09,740 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:32:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:09,740 INFO L82 PathProgramCache]: Analyzing trace with hash 874935118, now seen corresponding path program 1 times [2020-12-03 12:32:09,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:32:09,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304111627] [2020-12-03 12:32:09,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-03 12:32:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:09,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-03 12:32:09,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:09,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:32:09,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304111627] [2020-12-03 12:32:09,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:09,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-03 12:32:09,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040652016] [2020-12-03 12:32:09,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:32:09,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:32:09,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:32:09,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:32:09,854 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2020-12-03 12:32:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:09,904 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-12-03 12:32:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:32:09,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-03 12:32:09,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:09,905 INFO L225 Difference]: With dead ends: 39 [2020-12-03 12:32:09,906 INFO L226 Difference]: Without dead ends: 23 [2020-12-03 12:32:09,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:32:09,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-03 12:32:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-03 12:32:09,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-03 12:32:09,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-03 12:32:09,910 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2020-12-03 12:32:09,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:09,910 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-03 12:32:09,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:32:09,911 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-03 12:32:09,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-03 12:32:09,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:09,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:32:10,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-03 12:32:10,125 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:32:10,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:10,125 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-12-03 12:32:10,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:32:10,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955735050] [2020-12-03 12:32:10,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-03 12:32:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:10,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 12:32:10,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:10,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:32:10,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955735050] [2020-12-03 12:32:10,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:10,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:32:10,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433166148] [2020-12-03 12:32:10,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:32:10,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:32:10,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:32:10,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:32:10,272 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 3 states. [2020-12-03 12:32:10,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:10,280 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-12-03 12:32:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:32:10,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-03 12:32:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:10,287 INFO L225 Difference]: With dead ends: 33 [2020-12-03 12:32:10,287 INFO L226 Difference]: Without dead ends: 23 [2020-12-03 12:32:10,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:32:10,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-03 12:32:10,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-03 12:32:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-03 12:32:10,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-03 12:32:10,291 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2020-12-03 12:32:10,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:10,291 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-03 12:32:10,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:32:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-03 12:32:10,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-03 12:32:10,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:10,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:32:10,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-03 12:32:10,506 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:32:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:10,506 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-12-03 12:32:10,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:32:10,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588826832] [2020-12-03 12:32:10,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-03 12:32:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:10,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-03 12:32:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:10,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:32:10,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588826832] [2020-12-03 12:32:10,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:10,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-03 12:32:10,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527265876] [2020-12-03 12:32:10,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:32:10,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:32:10,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:32:10,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:32:10,635 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2020-12-03 12:32:10,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:10,697 INFO L93 Difference]: Finished difference Result 26 states and 25 transitions. [2020-12-03 12:32:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:32:10,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-03 12:32:10,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:10,698 INFO L225 Difference]: With dead ends: 26 [2020-12-03 12:32:10,698 INFO L226 Difference]: Without dead ends: 23 [2020-12-03 12:32:10,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:32:10,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-03 12:32:10,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-03 12:32:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-03 12:32:10,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-12-03 12:32:10,703 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 18 [2020-12-03 12:32:10,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:10,703 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-12-03 12:32:10,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:32:10,703 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-12-03 12:32:10,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-03 12:32:10,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:10,704 INFO L422 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] [2020-12-03 12:32:10,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-03 12:32:10,932 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:32:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:10,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-12-03 12:32:10,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:32:10,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866373924] [2020-12-03 12:32:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-03 12:32:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:32:11,046 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:32:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:32:11,126 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:32:11,202 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-03 12:32:11,202 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:32:11,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-03 12:32:11,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:32:11 BoogieIcfgContainer [2020-12-03 12:32:11,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:32:11,445 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:32:11,445 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:32:11,445 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:32:11,446 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:32:07" (3/4) ... [2020-12-03 12:32:11,448 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 12:32:11,500 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4c141c6b-91cf-47d4-b470-25d300a08968/bin/utaipan/witness.graphml [2020-12-03 12:32:11,501 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:32:11,503 INFO L168 Benchmark]: Toolchain (without parser) took 4496.62 ms. Allocated memory was 58.7 MB in the beginning and 92.3 MB in the end (delta: 33.6 MB). Free memory was 38.1 MB in the beginning and 63.2 MB in the end (delta: -25.0 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:11,504 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 41.4 MB in the end (delta: 81.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:32:11,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.37 ms. Allocated memory is still 58.7 MB. Free memory was 37.9 MB in the beginning and 42.0 MB in the end (delta: -4.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:11,505 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.54 ms. Allocated memory is still 58.7 MB. Free memory was 41.8 MB in the beginning and 40.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:32:11,505 INFO L168 Benchmark]: Boogie Preprocessor took 35.29 ms. Allocated memory is still 58.7 MB. Free memory was 40.2 MB in the beginning and 38.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:11,506 INFO L168 Benchmark]: RCFGBuilder took 453.69 ms. Allocated memory was 58.7 MB in the beginning and 75.5 MB in the end (delta: 16.8 MB). Free memory was 38.5 MB in the beginning and 50.9 MB in the end (delta: -12.4 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:11,507 INFO L168 Benchmark]: TraceAbstraction took 3571.82 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 50.4 MB in the beginning and 65.3 MB in the end (delta: -14.9 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:11,507 INFO L168 Benchmark]: Witness Printer took 55.84 ms. Allocated memory is still 92.3 MB. Free memory was 65.3 MB in the beginning and 63.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:11,511 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 41.4 MB in the end (delta: 81.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 332.37 ms. Allocated memory is still 58.7 MB. Free memory was 37.9 MB in the beginning and 42.0 MB in the end (delta: -4.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.54 ms. Allocated memory is still 58.7 MB. Free memory was 41.8 MB in the beginning and 40.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.29 ms. Allocated memory is still 58.7 MB. Free memory was 40.2 MB in the beginning and 38.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 453.69 ms. Allocated memory was 58.7 MB in the beginning and 75.5 MB in the end (delta: 16.8 MB). Free memory was 38.5 MB in the beginning and 50.9 MB in the end (delta: -12.4 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3571.82 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 50.4 MB in the beginning and 65.3 MB in the end (delta: -14.9 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * Witness Printer took 55.84 ms. Allocated memory is still 92.3 MB. Free memory was 65.3 MB in the beginning and 63.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 72]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L38] COND FALSE !(__fpclassify_float(x) == 0) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L40] COND FALSE !(__fpclassify_float(y) == 0) [L43] EXPR x < y ? x : y [L43] return x < y ? x : y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L47] __uint32_t w; [L50] ieee_float_shape_type gf_u; [L51] gf_u.value = (x) [L52] EXPR gf_u.word [L52] (w) = gf_u.word [L55] return (w & 0x80000000) != 0; [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 214 SDtfs, 118 SDslu, 217 SDs, 0 SdLazy, 82 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 3941 SizeOfPredicates, 27 NumberOfNonLiveVariables, 403 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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! Received shutdown request...