./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/filter2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8 --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 e42e84729022b725ebcfce66d0ece68757a1a9b385230356b4d45a24fc6b4ef2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:09:19,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:09:19,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:09:19,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:09:19,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:09:19,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:09:19,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:09:19,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:09:19,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:09:19,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:09:19,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:09:19,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:09:19,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:09:19,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:09:19,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:09:19,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:09:19,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:09:19,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:09:19,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:09:19,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:09:19,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:09:19,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:09:19,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:09:19,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:09:19,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:09:19,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:09:19,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:09:19,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:09:19,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:09:19,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:09:19,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:09:19,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:09:19,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:09:19,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:09:19,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:09:19,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:09:19,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:09:19,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:09:19,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:09:19,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:09:19,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:09:19,971 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:09:20,002 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:09:20,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:09:20,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:09:20,004 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:09:20,005 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:09:20,005 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:09:20,005 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:09:20,006 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:09:20,006 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:09:20,006 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:09:20,007 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:09:20,007 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:09:20,008 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:09:20,008 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:09:20,008 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:09:20,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:09:20,010 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:09:20,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:09:20,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:09:20,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:09:20,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:09:20,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:09:20,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:09:20,012 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:09:20,013 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:09:20,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:09:20,013 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:09:20,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:09:20,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:09:20,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:09:20,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:20,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:09:20,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:09:20,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:09:20,017 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:09:20,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:09:20,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:09:20,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:09:20,018 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:09:20,018 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e42e84729022b725ebcfce66d0ece68757a1a9b385230356b4d45a24fc6b4ef2 [2021-11-07 02:09:20,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:09:20,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:09:20,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:09:20,381 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:09:20,382 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:09:20,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/float-benchs/filter2.c [2021-11-07 02:09:20,458 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/data/b9353bc9e/9ab8b9f167884f6fa825c144c225553d/FLAG86872d941 [2021-11-07 02:09:21,041 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:09:21,045 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/sv-benchmarks/c/float-benchs/filter2.c [2021-11-07 02:09:21,058 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/data/b9353bc9e/9ab8b9f167884f6fa825c144c225553d/FLAG86872d941 [2021-11-07 02:09:21,361 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/data/b9353bc9e/9ab8b9f167884f6fa825c144c225553d [2021-11-07 02:09:21,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:09:21,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:09:21,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:21,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:09:21,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:09:21,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:21,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@204cd111 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21, skipping insertion in model container [2021-11-07 02:09:21,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:21,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:09:21,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:09:21,652 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/sv-benchmarks/c/float-benchs/filter2.c[652,665] [2021-11-07 02:09:21,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:21,685 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:09:21,711 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/sv-benchmarks/c/float-benchs/filter2.c[652,665] [2021-11-07 02:09:21,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:21,753 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:09:21,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21 WrapperNode [2021-11-07 02:09:21,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:21,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:09:21,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:09:21,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:09:21,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:21,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:21,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:09:21,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:09:21,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:09:21,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:09:21,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:21,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:21,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:21,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:21,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:21,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:21,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:21,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:09:21,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:09:21,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:09:21,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:09:21,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:21,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:21,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:21,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:09:21,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:09:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:09:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:09:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:09:21,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:09:22,359 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:09:22,360 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-07 02:09:22,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:22 BoogieIcfgContainer [2021-11-07 02:09:22,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:09:22,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:09:22,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:09:22,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:09:22,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:09:21" (1/3) ... [2021-11-07 02:09:22,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481102e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:22, skipping insertion in model container [2021-11-07 02:09:22,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (2/3) ... [2021-11-07 02:09:22,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481102e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:22, skipping insertion in model container [2021-11-07 02:09:22,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:22" (3/3) ... [2021-11-07 02:09:22,387 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2.c [2021-11-07 02:09:22,408 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:09:22,408 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:09:22,520 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:09:22,545 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:09:22,546 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:09:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:22,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-07 02:09:22,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:22,598 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-07 02:09:22,598 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:22,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:22,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2885051, now seen corresponding path program 1 times [2021-11-07 02:09:22,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:09:22,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512588760] [2021-11-07 02:09:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:22,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:09:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 02:09:22,847 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 02:09:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 02:09:22,955 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-07 02:09:22,961 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 02:09:22,962 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 02:09:22,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:09:22,969 INFO L731 BasicCegarLoop]: Path program histogram: [1] [2021-11-07 02:09:22,973 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 02:09:23,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:09:23 BoogieIcfgContainer [2021-11-07 02:09:23,001 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 02:09:23,006 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 02:09:23,006 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 02:09:23,007 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 02:09:23,008 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:22" (3/4) ... [2021-11-07 02:09:23,012 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 02:09:23,013 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 02:09:23,018 INFO L168 Benchmark]: Toolchain (without parser) took 1648.41 ms. Allocated memory is still 92.3 MB. Free memory was 51.0 MB in the beginning and 35.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:23,019 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 92.3 MB. Free memory was 67.2 MB in the beginning and 67.1 MB in the end (delta: 42.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:09:23,021 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.80 ms. Allocated memory is still 92.3 MB. Free memory was 50.8 MB in the beginning and 67.2 MB in the end (delta: -16.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:23,023 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.28 ms. Allocated memory is still 92.3 MB. Free memory was 67.0 MB in the beginning and 65.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:23,024 INFO L168 Benchmark]: Boogie Preprocessor took 29.66 ms. Allocated memory is still 92.3 MB. Free memory was 65.6 MB in the beginning and 64.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:23,026 INFO L168 Benchmark]: RCFGBuilder took 537.39 ms. Allocated memory is still 92.3 MB. Free memory was 64.4 MB in the beginning and 49.5 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:23,034 INFO L168 Benchmark]: TraceAbstraction took 636.01 ms. Allocated memory is still 92.3 MB. Free memory was 49.0 MB in the beginning and 35.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:23,036 INFO L168 Benchmark]: Witness Printer took 7.42 ms. Allocated memory is still 92.3 MB. Free memory was 35.4 MB in the beginning and 35.2 MB in the end (delta: 210.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:09:23,044 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 92.3 MB. Free memory was 67.2 MB in the beginning and 67.1 MB in the end (delta: 42.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 383.80 ms. Allocated memory is still 92.3 MB. Free memory was 50.8 MB in the beginning and 67.2 MB in the end (delta: -16.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.28 ms. Allocated memory is still 92.3 MB. Free memory was 67.0 MB in the beginning and 65.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.66 ms. Allocated memory is still 92.3 MB. Free memory was 65.6 MB in the beginning and 64.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 537.39 ms. Allocated memory is still 92.3 MB. Free memory was 64.4 MB in the beginning and 49.5 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 636.01 ms. Allocated memory is still 92.3 MB. Free memory was 49.0 MB in the beginning and 35.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 7.42 ms. Allocated memory is still 92.3 MB. Free memory was 35.4 MB in the beginning and 35.2 MB in the end (delta: 210.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 38, overapproximation of to_real at line 30, overapproximation of someBinaryArithmeticDOUBLEoperation at line 42. Possible FailurePath: [L22] double E, E0, E1, S0, S1, S; [L23] int i; [L25] E = __VERIFIER_nondet_double() [L26] E0 = __VERIFIER_nondet_double() [L15] COND FALSE !(!cond) [L15] COND FALSE !(!cond) [L30] S0 = 0 [L31] S = 0 [L33] i = 0 [L33] COND TRUE i <= 1000000 [L34] E1 = E0 [L35] E0 = E [L37] E = __VERIFIER_nondet_double() [L15] COND FALSE !(!cond) [L40] S1 = S0 [L41] S0 = S [L42] S = 0.7*E - E0*1.3 + E1*1.1 + S0*1.4 - S1*0.7 [L17] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 02:09:23,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8 --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 e42e84729022b725ebcfce66d0ece68757a1a9b385230356b4d45a24fc6b4ef2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:09:26,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:09:26,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:09:26,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:09:26,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:09:26,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:09:26,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:09:26,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:09:26,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:09:26,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:09:26,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:09:26,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:09:26,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:09:26,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:09:26,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:09:26,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:09:26,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:09:26,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:09:26,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:09:26,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:09:26,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:09:26,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:09:26,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:09:26,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:09:26,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:09:26,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:09:26,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:09:26,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:09:26,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:09:26,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:09:26,268 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:09:26,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:09:26,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:09:26,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:09:26,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:09:26,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:09:26,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:09:26,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:09:26,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:09:26,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:09:26,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:09:26,278 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:09:26,333 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:09:26,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:09:26,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:09:26,336 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:09:26,336 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:09:26,336 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:09:26,337 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:09:26,337 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:09:26,337 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:09:26,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:09:26,341 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:09:26,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:09:26,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:09:26,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:09:26,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:09:26,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:09:26,342 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:09:26,343 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:09:26,343 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:09:26,343 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:09:26,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:09:26,344 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:09:26,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:09:26,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:09:26,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:09:26,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:09:26,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:26,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:09:26,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:09:26,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:09:26,346 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:09:26,347 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:26,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:09:26,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:09:26,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:09:26,348 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e42e84729022b725ebcfce66d0ece68757a1a9b385230356b4d45a24fc6b4ef2 [2021-11-07 02:09:26,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:09:26,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:09:26,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:09:26,936 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:09:26,936 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:09:26,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/float-benchs/filter2.c [2021-11-07 02:09:27,028 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/data/e6aa6b747/7baad85b29a64709905e111ddb3ec28b/FLAG3221b356a [2021-11-07 02:09:27,723 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:09:27,724 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/sv-benchmarks/c/float-benchs/filter2.c [2021-11-07 02:09:27,736 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/data/e6aa6b747/7baad85b29a64709905e111ddb3ec28b/FLAG3221b356a [2021-11-07 02:09:28,075 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/data/e6aa6b747/7baad85b29a64709905e111ddb3ec28b [2021-11-07 02:09:28,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:09:28,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:09:28,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:28,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:09:28,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:09:28,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:28" (1/1) ... [2021-11-07 02:09:28,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ff34c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:28, skipping insertion in model container [2021-11-07 02:09:28,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:28" (1/1) ... [2021-11-07 02:09:28,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:09:28,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:09:28,340 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/sv-benchmarks/c/float-benchs/filter2.c[652,665] [2021-11-07 02:09:28,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:28,391 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:09:28,413 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/sv-benchmarks/c/float-benchs/filter2.c[652,665] [2021-11-07 02:09:28,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:28,485 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:09:28,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:28 WrapperNode [2021-11-07 02:09:28,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:28,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:09:28,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:09:28,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:09:28,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:28" (1/1) ... [2021-11-07 02:09:28,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:28" (1/1) ... [2021-11-07 02:09:28,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:09:28,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:09:28,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:09:28,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:09:28,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:28" (1/1) ... [2021-11-07 02:09:28,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:28" (1/1) ... [2021-11-07 02:09:28,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:28" (1/1) ... [2021-11-07 02:09:28,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:28" (1/1) ... [2021-11-07 02:09:28,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:28" (1/1) ... [2021-11-07 02:09:28,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:28" (1/1) ... [2021-11-07 02:09:28,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:28" (1/1) ... [2021-11-07 02:09:28,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:09:28,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:09:28,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:09:28,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:09:28,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:28" (1/1) ... [2021-11-07 02:09:28,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:28,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:28,720 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:09:28,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:09:28,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:09:28,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:09:28,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:09:28,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:09:31,389 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:09:31,389 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-07 02:09:31,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:31 BoogieIcfgContainer [2021-11-07 02:09:31,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:09:31,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:09:31,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:09:31,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:09:31,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:09:28" (1/3) ... [2021-11-07 02:09:31,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573ec723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:31, skipping insertion in model container [2021-11-07 02:09:31,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:28" (2/3) ... [2021-11-07 02:09:31,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573ec723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:31, skipping insertion in model container [2021-11-07 02:09:31,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:31" (3/3) ... [2021-11-07 02:09:31,402 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2.c [2021-11-07 02:09:31,409 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:09:31,409 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:09:31,468 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:09:31,476 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:09:31,477 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:09:31,493 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 02:09:31,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:31,518 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:31,519 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:31,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:31,547 INFO L85 PathProgramCache]: Analyzing trace with hash 335317555, now seen corresponding path program 1 times [2021-11-07 02:09:31,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:31,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842376364] [2021-11-07 02:09:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:31,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:31,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:31,575 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:31,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:09:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:33,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:09:33,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:33,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:33,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:33,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842376364] [2021-11-07 02:09:33,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842376364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:33,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:33,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:09:33,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629323428] [2021-11-07 02:09:33,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:09:33,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:33,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:09:33,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:09:33,571 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:33,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:33,612 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-11-07 02:09:33,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:09:33,614 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 02:09:33,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:33,624 INFO L225 Difference]: With dead ends: 31 [2021-11-07 02:09:33,637 INFO L226 Difference]: Without dead ends: 13 [2021-11-07 02:09:33,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:09:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-07 02:09:33,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-07 02:09:33,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:33,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-07 02:09:33,711 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-11-07 02:09:33,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:33,712 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-07 02:09:33,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-07 02:09:33,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 02:09:33,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:33,713 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:33,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:33,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:33,930 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:33,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:33,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1504524427, now seen corresponding path program 1 times [2021-11-07 02:09:33,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:33,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326015485] [2021-11-07 02:09:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:33,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:33,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:33,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:33,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc770c3-0ea6-47ae-bc32-526851bece31/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:09:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:43,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 02:09:43,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:45,408 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~E1~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~E~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~E0~0 (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (and (let ((.cse2 (let ((.cse5 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (.cse4 ((_ to_fp 11 53) roundNearestTiesToEven (/ 7.0 10.0)))) (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 ULTIMATE.start_main_~E~0) (fp.mul roundNearestTiesToEven ULTIMATE.start_main_~E0~0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 13.0 10.0)))) (fp.mul roundNearestTiesToEven ULTIMATE.start_main_~E1~0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 11.0 10.0)))) (fp.mul roundNearestTiesToEven .cse5 ((_ to_fp 11 53) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.mul roundNearestTiesToEven .cse5 .cse4)))) (.cse3 ((_ to_fp 11 53) roundNearestTiesToEven 4.0))) (let ((.cse0 (fp.geq .cse2 (fp.neg .cse3))) (.cse1 (fp.leq .cse2 .cse3))) (or (and .cse0 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) .cse1) (and (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (or (not .cse0) (not .cse1)))))) (fp.geq ULTIMATE.start_main_~E0~0 (_ +zero 11 53)) (fp.geq ULTIMATE.start_main_~E1~0 (_ +zero 11 53)) (fp.leq ULTIMATE.start_main_~E~0 .cse6) (fp.geq ULTIMATE.start_main_~E~0 (_ +zero 11 53)) (fp.leq ULTIMATE.start_main_~E1~0 .cse6) (fp.leq ULTIMATE.start_main_~E0~0 .cse6)))) is different from false [2021-11-07 02:21:47,461 WARN L860 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~E1~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~E~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~E0~0 (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (and (let ((.cse2 (let ((.cse5 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (.cse4 ((_ to_fp 11 53) roundNearestTiesToEven (/ 7.0 10.0)))) (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 ULTIMATE.start_main_~E~0) (fp.mul roundNearestTiesToEven ULTIMATE.start_main_~E0~0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 13.0 10.0)))) (fp.mul roundNearestTiesToEven ULTIMATE.start_main_~E1~0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 11.0 10.0)))) (fp.mul roundNearestTiesToEven .cse5 ((_ to_fp 11 53) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.mul roundNearestTiesToEven .cse5 .cse4)))) (.cse3 ((_ to_fp 11 53) roundNearestTiesToEven 4.0))) (let ((.cse0 (fp.geq .cse2 (fp.neg .cse3))) (.cse1 (fp.leq .cse2 .cse3))) (or (and .cse0 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) .cse1) (and (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (or (not .cse0) (not .cse1)))))) (fp.geq ULTIMATE.start_main_~E0~0 (_ +zero 11 53)) (fp.geq ULTIMATE.start_main_~E1~0 (_ +zero 11 53)) (fp.leq ULTIMATE.start_main_~E~0 .cse6) (fp.geq ULTIMATE.start_main_~E~0 (_ +zero 11 53)) (fp.leq ULTIMATE.start_main_~E1~0 .cse6) (fp.leq ULTIMATE.start_main_~E0~0 .cse6)))) is different from true