./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF --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 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:51:00,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:51:00,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:51:00,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:51:00,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:51:00,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:51:00,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:51:00,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:51:00,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:51:00,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:51:00,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:51:00,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:51:00,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:51:00,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:51:00,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:51:00,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:51:00,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:51:00,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:51:00,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:51:00,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:51:00,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:51:00,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:51:00,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:51:00,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:51:00,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:51:00,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:51:00,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:51:00,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:51:00,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:51:00,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:51:00,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:51:00,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:51:00,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:51:00,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:51:00,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:51:00,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:51:00,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:51:00,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:51:00,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:51:00,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:51:00,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:51:00,928 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:51:00,955 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:51:00,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:51:00,956 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:51:00,956 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:51:00,956 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:51:00,956 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:51:00,957 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:51:00,957 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:51:00,957 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:51:00,957 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:51:00,957 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:51:00,958 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:51:00,958 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:51:00,958 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:51:00,958 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:51:00,958 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:51:00,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:51:00,959 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:51:00,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:51:00,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:51:00,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:51:00,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:51:00,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:51:00,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:51:00,961 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:51:00,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:51:00,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:51:00,961 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:51:00,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:51:00,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:51:00,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:51:00,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:51:00,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:51:00,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:51:00,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:51:00,963 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:51:00,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:51:00,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:51:00,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:51:00,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:51:00,964 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_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a [2021-11-12 23:51:01,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:51:01,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:51:01,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:51:01,238 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:51:01,239 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:51:01,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-11-12 23:51:01,328 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/data/f186e0f86/b24abdfbd3d3439eb5892ff37a99c81c/FLAG34344a180 [2021-11-12 23:51:01,758 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:51:01,759 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-11-12 23:51:01,769 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/data/f186e0f86/b24abdfbd3d3439eb5892ff37a99c81c/FLAG34344a180 [2021-11-12 23:51:02,144 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/data/f186e0f86/b24abdfbd3d3439eb5892ff37a99c81c [2021-11-12 23:51:02,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:51:02,151 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:51:02,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:02,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:51:02,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:51:02,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:02" (1/1) ... [2021-11-12 23:51:02,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d35993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:02, skipping insertion in model container [2021-11-12 23:51:02,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:02" (1/1) ... [2021-11-12 23:51:02,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:51:02,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:51:02,393 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_b34f5c75-886f-4510-a9e2-74f9ba319df5/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-11-12 23:51:02,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:02,406 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:51:02,420 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-11-12 23:51:02,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:02,436 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:51:02,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:02 WrapperNode [2021-11-12 23:51:02,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:02,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:51:02,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:51:02,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:51:02,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:02" (1/1) ... [2021-11-12 23:51:02,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:02" (1/1) ... [2021-11-12 23:51:02,475 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:51:02,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:51:02,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:51:02,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:51:02,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:02" (1/1) ... [2021-11-12 23:51:02,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:02" (1/1) ... [2021-11-12 23:51:02,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:02" (1/1) ... [2021-11-12 23:51:02,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:02" (1/1) ... [2021-11-12 23:51:02,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:02" (1/1) ... [2021-11-12 23:51:02,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:02" (1/1) ... [2021-11-12 23:51:02,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:02" (1/1) ... [2021-11-12 23:51:02,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:51:02,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:51:02,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:51:02,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:51:02,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:02" (1/1) ... [2021-11-12 23:51:02,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:51:02,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:51:02,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:51:02,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:51:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:51:02,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:51:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:51:02,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:51:02,824 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:51:02,824 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:51:02,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:51:02 BoogieIcfgContainer [2021-11-12 23:51:02,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:51:02,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:51:02,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:51:02,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:51:02,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:51:02" (1/3) ... [2021-11-12 23:51:02,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38778957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:51:02, skipping insertion in model container [2021-11-12 23:51:02,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:02" (2/3) ... [2021-11-12 23:51:02,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38778957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:51:02, skipping insertion in model container [2021-11-12 23:51:02,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:51:02" (3/3) ... [2021-11-12 23:51:02,835 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i.p+cfa-reducer.c [2021-11-12 23:51:02,840 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:51:02,840 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:51:02,887 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:51:02,894 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 [2021-11-12 23:51:02,894 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:51:02,907 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) [2021-11-12 23:51:02,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 23:51:02,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:02,912 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 23:51:02,913 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:02,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:02,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1497591, now seen corresponding path program 1 times [2021-11-12 23:51:02,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:51:02,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497977143] [2021-11-12 23:51:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:02,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:51:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:51:03,028 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 23:51:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:51:03,065 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 23:51:03,067 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 23:51:03,068 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:51:03,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:51:03,074 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-12 23:51:03,077 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:51:03,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:51:03 BoogieIcfgContainer [2021-11-12 23:51:03,096 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:51:03,097 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:51:03,097 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:51:03,098 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:51:03,098 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:51:02" (3/4) ... [2021-11-12 23:51:03,101 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 23:51:03,101 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:51:03,102 INFO L158 Benchmark]: Toolchain (without parser) took 950.99ms. Allocated memory is still 134.2MB. Free memory was 101.3MB in the beginning and 85.3MB in the end (delta: 16.0MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. [2021-11-12 23:51:03,103 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 88.1MB. Free memory was 44.1MB in the beginning and 44.0MB in the end (delta: 40.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:51:03,104 INFO L158 Benchmark]: CACSL2BoogieTranslator took 282.05ms. Allocated memory is still 134.2MB. Free memory was 101.1MB in the beginning and 110.4MB in the end (delta: -9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:51:03,104 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.75ms. Allocated memory is still 134.2MB. Free memory was 110.4MB in the beginning and 108.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:51:03,105 INFO L158 Benchmark]: Boogie Preprocessor took 33.17ms. Allocated memory is still 134.2MB. Free memory was 108.9MB in the beginning and 108.0MB in the end (delta: 938.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:51:03,106 INFO L158 Benchmark]: RCFGBuilder took 316.60ms. Allocated memory is still 134.2MB. Free memory was 108.0MB in the beginning and 98.9MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:51:03,106 INFO L158 Benchmark]: TraceAbstraction took 268.20ms. Allocated memory is still 134.2MB. Free memory was 98.4MB in the beginning and 85.7MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:51:03,107 INFO L158 Benchmark]: Witness Printer took 4.13ms. Allocated memory is still 134.2MB. Free memory was 85.7MB in the beginning and 85.3MB in the end (delta: 452.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:51:03,110 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 88.1MB. Free memory was 44.1MB in the beginning and 44.0MB in the end (delta: 40.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 282.05ms. Allocated memory is still 134.2MB. Free memory was 101.1MB in the beginning and 110.4MB in the end (delta: -9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.75ms. Allocated memory is still 134.2MB. Free memory was 110.4MB in the beginning and 108.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.17ms. Allocated memory is still 134.2MB. Free memory was 108.9MB in the beginning and 108.0MB in the end (delta: 938.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 316.60ms. Allocated memory is still 134.2MB. Free memory was 108.0MB in the beginning and 98.9MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 268.20ms. Allocated memory is still 134.2MB. Free memory was 98.4MB in the beginning and 85.7MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 4.13ms. Allocated memory is still 134.2MB. Free memory was 85.7MB in the beginning and 85.3MB in the end (delta: 452.4kB). There was no memory consumed. Max. memory is 16.1GB. * 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: 27]: 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 12, overapproximation of someBinaryArithmeticDOUBLEoperation at line 10. Possible FailurePath: [L1] int __return_main; [L9] double main__x = 1.0; [L10] double main__x1 = main__x / 1.6; VAL [__return_main=0, main__x=1] [L12] COND FALSE !(main__x1 != main__x) [L21] int __tmp_1; [L22] __tmp_1 = main__x == 0 [L23] int __VERIFIER_assert__cond; [L24] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L25] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L27] reach_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, 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: , 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 [2021-11-12 23:51:03,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/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_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF --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 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:51:05,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:51:05,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:51:05,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:51:05,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:51:05,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:51:05,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:51:05,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:51:05,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:51:05,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:51:05,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:51:05,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:51:05,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:51:05,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:51:05,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:51:05,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:51:05,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:51:05,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:51:05,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:51:05,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:51:05,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:51:05,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:51:05,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:51:05,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:51:05,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:51:05,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:51:05,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:51:05,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:51:05,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:51:05,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:51:05,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:51:05,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:51:05,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:51:05,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:51:05,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:51:05,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:51:05,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:51:05,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:51:05,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:51:05,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:51:05,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:51:05,652 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:51:05,708 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:51:05,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:51:05,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:51:05,710 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:51:05,710 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:51:05,711 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:51:05,711 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:51:05,711 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:51:05,712 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:51:05,712 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:51:05,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:51:05,715 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:51:05,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:51:05,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:51:05,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:51:05,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:51:05,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:51:05,716 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:51:05,716 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:51:05,716 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:51:05,717 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:51:05,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:51:05,717 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:51:05,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:51:05,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:51:05,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:51:05,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:51:05,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:51:05,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:51:05,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:51:05,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:51:05,719 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:51:05,719 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:51:05,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:51:05,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:51:05,720 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:51:05,720 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_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a [2021-11-12 23:51:06,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:51:06,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:51:06,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:51:06,114 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:51:06,114 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:51:06,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-11-12 23:51:06,188 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/data/90b9b4392/5f449fb2f36a46e89a99af48fa41286a/FLAG1ce80d9f6 [2021-11-12 23:51:06,727 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:51:06,727 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-11-12 23:51:06,734 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/data/90b9b4392/5f449fb2f36a46e89a99af48fa41286a/FLAG1ce80d9f6 [2021-11-12 23:51:07,116 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/data/90b9b4392/5f449fb2f36a46e89a99af48fa41286a [2021-11-12 23:51:07,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:51:07,120 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:51:07,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:07,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:51:07,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:51:07,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:07" (1/1) ... [2021-11-12 23:51:07,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@160ad249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:07, skipping insertion in model container [2021-11-12 23:51:07,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:07" (1/1) ... [2021-11-12 23:51:07,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:51:07,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:51:07,347 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_b34f5c75-886f-4510-a9e2-74f9ba319df5/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-11-12 23:51:07,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:07,370 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:51:07,389 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_b34f5c75-886f-4510-a9e2-74f9ba319df5/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-11-12 23:51:07,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:07,407 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:51:07,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:07 WrapperNode [2021-11-12 23:51:07,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:07,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:51:07,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:51:07,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:51:07,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:07" (1/1) ... [2021-11-12 23:51:07,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:07" (1/1) ... [2021-11-12 23:51:07,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:51:07,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:51:07,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:51:07,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:51:07,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:07" (1/1) ... [2021-11-12 23:51:07,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:07" (1/1) ... [2021-11-12 23:51:07,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:07" (1/1) ... [2021-11-12 23:51:07,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:07" (1/1) ... [2021-11-12 23:51:07,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:07" (1/1) ... [2021-11-12 23:51:07,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:07" (1/1) ... [2021-11-12 23:51:07,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:07" (1/1) ... [2021-11-12 23:51:07,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:51:07,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:51:07,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:51:07,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:51:07,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:07" (1/1) ... [2021-11-12 23:51:07,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:51:07,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:51:07,561 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:51:07,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:51:07,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:51:07,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:51:07,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:51:07,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:51:10,117 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:51:10,117 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:51:10,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:51:10 BoogieIcfgContainer [2021-11-12 23:51:10,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:51:10,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:51:10,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:51:10,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:51:10,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:51:07" (1/3) ... [2021-11-12 23:51:10,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@899284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:51:10, skipping insertion in model container [2021-11-12 23:51:10,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:07" (2/3) ... [2021-11-12 23:51:10,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@899284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:51:10, skipping insertion in model container [2021-11-12 23:51:10,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:51:10" (3/3) ... [2021-11-12 23:51:10,127 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i.p+cfa-reducer.c [2021-11-12 23:51:10,132 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:51:10,132 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:51:10,175 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:51:10,181 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 [2021-11-12 23:51:10,182 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:51:10,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:10,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 23:51:10,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:10,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 23:51:10,200 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:10,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:10,206 INFO L85 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2021-11-12 23:51:10,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:10,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73901237] [2021-11-12 23:51:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:10,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:10,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:10,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:10,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:51:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:11,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:51:11,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:14,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:19,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:19,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73901237] [2021-11-12 23:51:19,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73901237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:19,460 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:19,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 23:51:19,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592855486] [2021-11-12 23:51:19,463 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:19,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:51:19,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:51:19,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-11-12 23:51:19,497 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-11-12 23:51:26,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:26,892 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-11-12 23:51:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:51:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-12 23:51:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:26,903 INFO L225 Difference]: With dead ends: 17 [2021-11-12 23:51:26,903 INFO L226 Difference]: Without dead ends: 8 [2021-11-12 23:51:26,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:51:26,910 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2303.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.80ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2434.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:26,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 9 Unknown, 0 Unchecked, 0.80ms Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 2434.48ms Time] [2021-11-12 23:51:26,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-12 23:51:26,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-12 23:51:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-11-12 23:51:26,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-12 23:51:26,939 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2021-11-12 23:51:26,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:26,939 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-12 23:51:26,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-11-12 23:51:26,940 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-12 23:51:26,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:51:26,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:26,941 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-11-12 23:51:26,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:27,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:27,156 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:27,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:27,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1805796550, now seen corresponding path program 1 times [2021-11-12 23:51:27,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:27,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746665583] [2021-11-12 23:51:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:27,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:27,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:27,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:27,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:51:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:29,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:51:29,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:39,028 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:51:41,422 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~main__x1~0#1| (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-12 23:51:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-12 23:51:49,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:58,263 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) is different from true [2021-11-12 23:52:05,026 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from false [2021-11-12 23:52:07,286 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2021-11-12 23:52:14,378 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from false [2021-11-12 23:52:16,754 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2021-11-12 23:52:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-12 23:52:16,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:16,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746665583] [2021-11-12 23:52:16,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746665583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:16,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1774914497] [2021-11-12 23:52:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:16,756 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:16,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:16,758 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:16,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-12 23:52:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:20,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:52:20,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:28,459 WARN L227 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:52:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-12 23:52:33,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-12 23:52:45,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1774914497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:45,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355890359] [2021-11-12 23:52:45,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:45,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:52:45,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:52:45,168 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:52:45,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:52:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:58,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:52:58,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:09,746 WARN L227 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:53:26,045 WARN L227 SmtUtils]: Spent 9.69s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:53:34,464 WARN L227 SmtUtils]: Spent 5.59s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:53:55,073 WARN L227 SmtUtils]: Spent 11.24s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:53:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:55,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:10,912 WARN L838 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| |c_ULTIMATE.start_main_~main__x~0#1|) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from false [2021-11-12 23:54:13,050 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| |c_ULTIMATE.start_main_~main__x~0#1|) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-11-12 23:54:18,132 WARN L227 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 6 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:54:23,245 WARN L227 SmtUtils]: Spent 5.11s on a formula simplification that was a NOOP. DAG size: 8 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:54:30,293 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1))) (or (fp.eq .cse0 |c_ULTIMATE.start_main_~main__x1~0#1|) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2021-11-12 23:54:32,560 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1))) (or (fp.eq .cse0 |c_ULTIMATE.start_main_~main__x1~0#1|) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2021-11-12 23:54:37,930 WARN L227 SmtUtils]: Spent 5.36s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:54:43,553 WARN L227 SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 8 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:54:49,181 WARN L227 SmtUtils]: Spent 5.63s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:54:51,567 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from false [2021-11-12 23:54:53,964 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from true [2021-11-12 23:54:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-12 23:54:53,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355890359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:54:53,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:54:53,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 16 [2021-11-12 23:54:53,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766375616] [2021-11-12 23:54:53,967 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:54:53,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 23:54:53,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:53,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 23:54:53,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=57, Unknown=19, NotChecked=154, Total=272 [2021-11-12 23:54:53,969 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 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) [2021-11-12 23:54:56,420 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse3))) (let ((.cse1 (fp.div c_currentRoundingMode .cse2 .cse3))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode .cse1 .cse3) .cse1)))) (and .cse0 (or .cse0 (fp.eq .cse1 .cse2) (fp.eq .cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from true [2021-11-12 23:54:58,706 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse2))) (let ((.cse1 (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)))) (and (or (fp.eq .cse0 |c_ULTIMATE.start_main_~main__x1~0#1|) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) .cse1) (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse2)) .cse1 (= c_currentRoundingMode roundNearestTiesToEven))))) is different from true [2021-11-12 23:55:00,873 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1) |c_ULTIMATE.start_main_~main__x1~0#1|))) (.cse2 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (and .cse0 (or .cse0 (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| |c_ULTIMATE.start_main_~main__x~0#1|) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x~0#1| .cse1)) (= |c_ULTIMATE.start_main_~main__x~0#1| .cse2) (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode .cse2 .cse1)) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2021-11-12 23:55:08,740 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:10,756 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:10,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:55:10,954 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-11-12 23:55:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:55:10,955 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 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 7 [2021-11-12 23:55:10,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:55:10,955 INFO L225 Difference]: With dead ends: 13 [2021-11-12 23:55:10,955 INFO L226 Difference]: Without dead ends: 10 [2021-11-12 23:55:10,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 90.6s TimeCoverageRelationStatistics Valid=55, Invalid=72, Unknown=23, NotChecked=270, Total=420 [2021-11-12 23:55:10,958 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6502.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.10ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 6679.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:55:10,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 62 Unknown, 0 Unchecked, 1.10ms Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 2 Unknown, 43 Unchecked, 6679.06ms Time] [2021-11-12 23:55:10,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-12 23:55:10,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-12 23:55:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:55:10,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-12 23:55:10,963 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-11-12 23:55:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:55:10,964 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-12 23:55:10,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 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) [2021-11-12 23:55:10,964 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-12 23:55:10,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:55:10,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:55:10,965 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-11-12 23:55:10,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:55:11,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:55:11,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-12 23:55:11,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:55:11,574 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:55:11,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:55:11,575 INFO L85 PathProgramCache]: Analyzing trace with hash 201697478, now seen corresponding path program 2 times [2021-11-12 23:55:11,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:55:11,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875807316] [2021-11-12 23:55:11,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:55:11,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:55:11,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:55:11,581 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:55:11,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:55:15,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:55:15,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:55:15,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:55:15,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:55:25,161 WARN L227 SmtUtils]: Spent 5.10s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:55:27,468 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~main__x1~0#1| (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-12 23:55:33,150 WARN L227 SmtUtils]: Spent 5.65s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:55:36,706 WARN L860 $PredicateComparison]: unable to prove that (and (= (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0)) |c_ULTIMATE.start_main_~main__x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-12 23:55:42,982 WARN L227 SmtUtils]: Spent 6.25s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:55:45,506 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~main__x1~0#1| (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-12 23:55:55,047 WARN L227 SmtUtils]: Spent 6.81s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:56:16,209 WARN L227 SmtUtils]: Spent 12.98s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:56:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-12 23:56:16,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:56:25,935 WARN L838 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from false [2021-11-12 23:56:28,076 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-11-12 23:56:33,282 WARN L227 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 8 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:56:40,434 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2021-11-12 23:56:42,686 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2021-11-12 23:56:48,104 WARN L227 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:56:53,727 WARN L227 SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:56:56,157 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-11-12 23:56:58,600 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-11-12 23:57:04,607 WARN L227 SmtUtils]: Spent 6.00s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:57:10,842 WARN L227 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:57:13,379 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-11-12 23:57:14,993 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-12 23:57:14,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:57:14,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875807316] [2021-11-12 23:57:14,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-12 23:57:14,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-12 23:57:14,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1055022487] [2021-11-12 23:57:14,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:57:14,995 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:57:14,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:57:14,997 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:57:15,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 23:57:21,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:57:21,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:57:21,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:57:21,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:57:21,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-12 23:57:21,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737080752] [2021-11-12 23:57:21,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:57:21,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:57:21,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:57:21,124 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:57:21,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 00:02:37,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 00:02:37,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 00:02:37,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 00:02:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:02:37,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-13 00:02:37,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-13 00:02:37,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-13 00:02:37,849 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-13 00:02:37,849 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-13 00:02:37,857 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 00:02:37,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 00:02:38,264 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forcibly destroying the process [2021-11-13 00:02:38,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 00:02:38,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-13 00:02:38,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34f5c75-886f-4510-a9e2-74f9ba319df5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 00:02:38,504 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1] [2021-11-13 00:02:38,506 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 00:02:38,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 12:02:38 BoogieIcfgContainer [2021-11-13 00:02:38,520 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 00:02:38,520 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 00:02:38,521 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 00:02:38,521 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 00:02:38,521 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:51:10" (3/4) ... [2021-11-13 00:02:38,525 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-13 00:02:38,525 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 00:02:38,526 INFO L158 Benchmark]: Toolchain (without parser) took 691406.00ms. Allocated memory is still 88.1MB. Free memory was 52.9MB in the beginning and 43.4MB in the end (delta: 9.4MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. [2021-11-13 00:02:38,526 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 88.1MB. Free memory was 69.2MB in the beginning and 69.1MB in the end (delta: 78.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 00:02:38,527 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.52ms. Allocated memory is still 88.1MB. Free memory was 52.7MB in the beginning and 68.6MB in the end (delta: -15.9MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2021-11-13 00:02:38,528 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.63ms. Allocated memory is still 88.1MB. Free memory was 68.6MB in the beginning and 73.2MB in the end (delta: -4.6MB). Peak memory consumption was 2.2MB. Max. memory is 16.1GB. [2021-11-13 00:02:38,528 INFO L158 Benchmark]: Boogie Preprocessor took 55.36ms. Allocated memory is still 88.1MB. Free memory was 73.2MB in the beginning and 72.2MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 00:02:38,529 INFO L158 Benchmark]: RCFGBuilder took 2593.82ms. Allocated memory is still 88.1MB. Free memory was 71.9MB in the beginning and 62.7MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 00:02:38,529 INFO L158 Benchmark]: TraceAbstraction took 688399.22ms. Allocated memory is still 88.1MB. Free memory was 62.2MB in the beginning and 43.9MB in the end (delta: 18.3MB). Peak memory consumption was 19.3MB. Max. memory is 16.1GB. [2021-11-13 00:02:38,530 INFO L158 Benchmark]: Witness Printer took 4.92ms. Allocated memory is still 88.1MB. Free memory was 43.9MB in the beginning and 43.4MB in the end (delta: 488.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 00:02:38,533 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 88.1MB. Free memory was 69.2MB in the beginning and 69.1MB in the end (delta: 78.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 287.52ms. Allocated memory is still 88.1MB. Free memory was 52.7MB in the beginning and 68.6MB in the end (delta: -15.9MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.63ms. Allocated memory is still 88.1MB. Free memory was 68.6MB in the beginning and 73.2MB in the end (delta: -4.6MB). Peak memory consumption was 2.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.36ms. Allocated memory is still 88.1MB. Free memory was 73.2MB in the beginning and 72.2MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2593.82ms. Allocated memory is still 88.1MB. Free memory was 71.9MB in the beginning and 62.7MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 688399.22ms. Allocated memory is still 88.1MB. Free memory was 62.2MB in the beginning and 43.9MB in the end (delta: 18.3MB). Peak memory consumption was 19.3MB. Max. memory is 16.1GB. * Witness Printer took 4.92ms. Allocated memory is still 88.1MB. Free memory was 43.9MB in the beginning and 43.4MB in the end (delta: 488.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L1] int __return_main; [L9] double main__x = 1.0; [L10] double main__x1 = main__x / 1.6; [L12] COND TRUE main__x1 != main__x [L14] main__x = main__x1 [L15] main__x1 = main__x / 1.6 [L12] COND TRUE main__x1 != main__x [L14] main__x = main__x1 [L15] main__x1 = main__x / 1.6 [L12] COND TRUE main__x1 != main__x [L14] main__x = main__x1 [L15] main__x1 = main__x / 1.6 [L12] COND TRUE main__x1 != main__x [L14] main__x = main__x1 [L15] main__x1 = main__x / 1.6 [L12] COND FALSE !(main__x1 != main__x) [L21] int __tmp_1; [L22] __tmp_1 = main__x == 0 [L23] int __VERIFIER_assert__cond; [L24] __VERIFIER_assert__cond = __tmp_1 [L25] COND TRUE __VERIFIER_assert__cond == 0 [L27] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 688.3s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 24.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 12 SdHoareTripleChecker+Valid, 9113.54ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12 mSDsluCounter, 24 SdHoareTripleChecker+Invalid, 8806.06ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 43 IncrementalHoareTripleChecker+Unchecked, 15 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20 IncrementalHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 9 mSDtfsCounter, 20 mSolverCounterSat, 1.90ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 99.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=2, InterpolantAutomatonStates: 13, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 23.9s SatisfiabilityAnalysisTime, 315.4s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 624 SizeOfPredicates, 27 NumberOfNonLiveVariables, 180 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 0/28 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN