./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI --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 aa004690edfde808b1aefac96308d2a9e2df62056aeddc89c51bd2015ab29125 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:43:57,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:43:57,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:43:57,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:43:57,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:43:57,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:43:57,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:43:57,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:43:57,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:43:57,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:43:57,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:43:57,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:43:57,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:43:57,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:43:57,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:43:57,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:43:57,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:43:57,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:43:57,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:43:57,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:43:57,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:43:57,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:43:57,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:43:57,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:43:57,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:43:57,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:43:57,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:43:57,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:43:57,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:43:57,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:43:57,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:43:57,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:43:57,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:43:57,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:43:57,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:43:57,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:43:57,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:43:57,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:43:57,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:43:57,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:43:57,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:43:57,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:43:57,441 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:43:57,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:43:57,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:43:57,446 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:43:57,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:43:57,448 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:43:57,448 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:43:57,448 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:43:57,448 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:43:57,448 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:43:57,449 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:43:57,450 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:43:57,450 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:43:57,450 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:43:57,450 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:43:57,451 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:43:57,451 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:43:57,451 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:43:57,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:43:57,452 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:43:57,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:43:57,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:43:57,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:43:57,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:43:57,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:43:57,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:43:57,455 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:43:57,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:43:57,455 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:43:57,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:43:57,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:43:57,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:43:57,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:43:57,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:43:57,457 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:43:57,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:43:57,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:43:57,457 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:43:57,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:43:57,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:43:57,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:43:57,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa004690edfde808b1aefac96308d2a9e2df62056aeddc89c51bd2015ab29125 [2022-11-03 02:43:57,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:43:57,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:43:57,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:43:57,788 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:43:57,789 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:43:57,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2022-11-03 02:43:57,880 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/data/c6cc0ab90/114ffa445d1e4fa4a13128f199937890/FLAGe1efd1692 [2022-11-03 02:43:58,330 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:43:58,331 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2022-11-03 02:43:58,342 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/data/c6cc0ab90/114ffa445d1e4fa4a13128f199937890/FLAGe1efd1692 [2022-11-03 02:43:58,725 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/data/c6cc0ab90/114ffa445d1e4fa4a13128f199937890 [2022-11-03 02:43:58,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:43:58,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:43:58,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:43:58,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:43:58,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:43:58,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:43:58" (1/1) ... [2022-11-03 02:43:58,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f351cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:58, skipping insertion in model container [2022-11-03 02:43:58,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:43:58" (1/1) ... [2022-11-03 02:43:58,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:43:58,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:43:58,929 WARN L230 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_0858c182-7d40-4d9d-b45b-864ba3cbae66/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i[808,821] [2022-11-03 02:43:58,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:43:58,952 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:43:58,975 WARN L230 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_0858c182-7d40-4d9d-b45b-864ba3cbae66/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i[808,821] [2022-11-03 02:43:58,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:43:58,992 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:43:58,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:58 WrapperNode [2022-11-03 02:43:58,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:43:58,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:43:58,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:43:58,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:43:59,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:58" (1/1) ... [2022-11-03 02:43:59,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:58" (1/1) ... [2022-11-03 02:43:59,030 INFO L138 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2022-11-03 02:43:59,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:43:59,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:43:59,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:43:59,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:43:59,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:58" (1/1) ... [2022-11-03 02:43:59,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:58" (1/1) ... [2022-11-03 02:43:59,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:58" (1/1) ... [2022-11-03 02:43:59,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:58" (1/1) ... [2022-11-03 02:43:59,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:58" (1/1) ... [2022-11-03 02:43:59,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:58" (1/1) ... [2022-11-03 02:43:59,061 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:58" (1/1) ... [2022-11-03 02:43:59,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:58" (1/1) ... [2022-11-03 02:43:59,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:43:59,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:43:59,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:43:59,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:43:59,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:58" (1/1) ... [2022-11-03 02:43:59,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:43:59,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:59,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:43:59,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:43:59,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:43:59,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:43:59,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:43:59,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:43:59,227 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:43:59,232 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:43:59,314 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:43:59,336 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:43:59,337 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:43:59,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:43:59 BoogieIcfgContainer [2022-11-03 02:43:59,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:43:59,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:43:59,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:43:59,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:43:59,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:43:58" (1/3) ... [2022-11-03 02:43:59,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa3ecbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:43:59, skipping insertion in model container [2022-11-03 02:43:59,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:58" (2/3) ... [2022-11-03 02:43:59,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa3ecbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:43:59, skipping insertion in model container [2022-11-03 02:43:59,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:43:59" (3/3) ... [2022-11-03 02:43:59,348 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i [2022-11-03 02:43:59,368 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:43:59,368 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:43:59,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:43:59,423 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@49528ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:43:59,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:43:59,427 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) [2022-11-03 02:43:59,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:43:59,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:59,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:43:59,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:59,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:59,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1880294, now seen corresponding path program 1 times [2022-11-03 02:43:59,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:59,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672157726] [2022-11-03 02:43:59,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:59,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:43:59,571 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:43:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:43:59,619 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:43:59,620 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:43:59,622 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:43:59,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:43:59,629 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:43:59,633 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:43:59,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:43:59 BoogieIcfgContainer [2022-11-03 02:43:59,655 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:43:59,657 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:43:59,658 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:43:59,658 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:43:59,659 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:43:59" (3/4) ... [2022-11-03 02:43:59,662 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:43:59,663 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:43:59,665 INFO L158 Benchmark]: Toolchain (without parser) took 934.58ms. Allocated memory is still 132.1MB. Free memory was 92.6MB in the beginning and 80.1MB in the end (delta: 12.6MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2022-11-03 02:43:59,666 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 132.1MB. Free memory was 109.7MB in the beginning and 109.6MB in the end (delta: 73.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:43:59,667 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.19ms. Allocated memory is still 132.1MB. Free memory was 92.5MB in the beginning and 106.2MB in the end (delta: -13.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:43:59,668 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.71ms. Allocated memory is still 132.1MB. Free memory was 106.2MB in the beginning and 104.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:43:59,673 INFO L158 Benchmark]: Boogie Preprocessor took 31.82ms. Allocated memory is still 132.1MB. Free memory was 104.8MB in the beginning and 103.9MB in the end (delta: 992.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:43:59,674 INFO L158 Benchmark]: RCFGBuilder took 275.03ms. Allocated memory is still 132.1MB. Free memory was 103.5MB in the beginning and 93.9MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:43:59,675 INFO L158 Benchmark]: TraceAbstraction took 313.40ms. Allocated memory is still 132.1MB. Free memory was 93.6MB in the beginning and 80.4MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:43:59,676 INFO L158 Benchmark]: Witness Printer took 5.96ms. Allocated memory is still 132.1MB. Free memory was 80.4MB in the beginning and 80.1MB in the end (delta: 365.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:43:59,679 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 132.1MB. Free memory was 109.7MB in the beginning and 109.6MB in the end (delta: 73.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.19ms. Allocated memory is still 132.1MB. Free memory was 92.5MB in the beginning and 106.2MB in the end (delta: -13.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.71ms. Allocated memory is still 132.1MB. Free memory was 106.2MB in the beginning and 104.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.82ms. Allocated memory is still 132.1MB. Free memory was 104.8MB in the beginning and 103.9MB in the end (delta: 992.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 275.03ms. Allocated memory is still 132.1MB. Free memory was 103.5MB in the beginning and 93.9MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 313.40ms. Allocated memory is still 132.1MB. Free memory was 93.6MB in the beginning and 80.4MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 5.96ms. Allocated memory is still 132.1MB. Free memory was 80.4MB in the beginning and 80.1MB in the end (delta: 365.2kB). 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: 13]: 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 23, overapproximation of someBinaryArithmeticDOUBLEoperation at line 21. Possible FailurePath: [L20] double x = 1.0; [L21] double x1 = x/1.6; VAL [x=1] [L23] COND FALSE !(x1 != x) [L29] CALL __VERIFIER_assert(x == 0) [L13] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L13] reach_error() VAL [\old(cond)=0, cond=0] - 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, 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 [2022-11-03 02:43:59,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI --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 aa004690edfde808b1aefac96308d2a9e2df62056aeddc89c51bd2015ab29125 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:44:02,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:44:02,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:44:02,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:44:02,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:44:02,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:44:02,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:44:02,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:44:02,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:44:02,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:44:02,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:44:02,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:44:02,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:44:02,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:44:02,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:44:02,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:44:02,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:44:02,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:44:02,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:44:02,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:44:02,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:44:02,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:44:02,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:44:02,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:44:02,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:44:02,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:44:02,194 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:44:02,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:44:02,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:44:02,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:44:02,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:44:02,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:44:02,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:44:02,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:44:02,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:44:02,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:44:02,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:44:02,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:44:02,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:44:02,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:44:02,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:44:02,205 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:44:02,248 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:44:02,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:44:02,249 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:44:02,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:44:02,250 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:44:02,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:44:02,251 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:44:02,251 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:44:02,251 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:44:02,251 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:44:02,252 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:44:02,253 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:44:02,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:44:02,255 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:44:02,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:44:02,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:44:02,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:44:02,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:44:02,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:44:02,256 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:44:02,256 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:44:02,256 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:44:02,256 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:44:02,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:44:02,256 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:44:02,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:44:02,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:44:02,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:44:02,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:44:02,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:44:02,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:44:02,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:44:02,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:44:02,258 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:44:02,259 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:02,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:44:02,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:44:02,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:44:02,259 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_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa004690edfde808b1aefac96308d2a9e2df62056aeddc89c51bd2015ab29125 [2022-11-03 02:44:02,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:44:02,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:44:02,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:44:02,723 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:44:02,724 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:44:02,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2022-11-03 02:44:02,796 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/data/77b9a14bc/760d244dc348408d87bd575ad33a14b0/FLAGff3a1ca72 [2022-11-03 02:44:03,380 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:44:03,381 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2022-11-03 02:44:03,388 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/data/77b9a14bc/760d244dc348408d87bd575ad33a14b0/FLAGff3a1ca72 [2022-11-03 02:44:03,724 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/data/77b9a14bc/760d244dc348408d87bd575ad33a14b0 [2022-11-03 02:44:03,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:44:03,732 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:44:03,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:44:03,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:44:03,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:44:03,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:44:03" (1/1) ... [2022-11-03 02:44:03,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bf90eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:03, skipping insertion in model container [2022-11-03 02:44:03,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:44:03" (1/1) ... [2022-11-03 02:44:03,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:44:03,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:44:03,958 WARN L230 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_0858c182-7d40-4d9d-b45b-864ba3cbae66/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i[808,821] [2022-11-03 02:44:03,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:44:03,983 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:44:04,044 WARN L230 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_0858c182-7d40-4d9d-b45b-864ba3cbae66/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i[808,821] [2022-11-03 02:44:04,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:44:04,073 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:44:04,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:04 WrapperNode [2022-11-03 02:44:04,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:44:04,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:44:04,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:44:04,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:44:04,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:04" (1/1) ... [2022-11-03 02:44:04,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:04" (1/1) ... [2022-11-03 02:44:04,106 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2022-11-03 02:44:04,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:44:04,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:44:04,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:44:04,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:44:04,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:04" (1/1) ... [2022-11-03 02:44:04,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:04" (1/1) ... [2022-11-03 02:44:04,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:04" (1/1) ... [2022-11-03 02:44:04,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:04" (1/1) ... [2022-11-03 02:44:04,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:04" (1/1) ... [2022-11-03 02:44:04,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:04" (1/1) ... [2022-11-03 02:44:04,128 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:04" (1/1) ... [2022-11-03 02:44:04,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:04" (1/1) ... [2022-11-03 02:44:04,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:44:04,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:44:04,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:44:04,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:44:04,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:04" (1/1) ... [2022-11-03 02:44:04,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:44:04,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:04,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:44:04,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:44:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:44:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:44:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:44:04,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:44:04,287 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:44:04,289 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:44:08,679 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:44:08,685 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:44:08,685 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:44:08,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:44:08 BoogieIcfgContainer [2022-11-03 02:44:08,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:44:08,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:44:08,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:44:08,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:44:08,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:44:03" (1/3) ... [2022-11-03 02:44:08,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@506b53d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:44:08, skipping insertion in model container [2022-11-03 02:44:08,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:04" (2/3) ... [2022-11-03 02:44:08,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@506b53d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:44:08, skipping insertion in model container [2022-11-03 02:44:08,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:44:08" (3/3) ... [2022-11-03 02:44:08,696 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i [2022-11-03 02:44:08,715 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:44:08,716 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:44:08,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:44:08,798 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@271a740c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:44:08,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:44:08,823 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:08,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 02:44:08,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:08,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 02:44:08,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:08,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:08,846 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2022-11-03 02:44:08,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:08,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813888223] [2022-11-03 02:44:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:08,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:08,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:08,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:08,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:44:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:09,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:44:09,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:15,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:15,080 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:15,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813888223] [2022-11-03 02:44:15,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813888223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:15,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:15,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:15,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736168240] [2022-11-03 02:44:15,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:15,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:44:15,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:15,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:44:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:44:15,119 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-03 02:44:22,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:22,124 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-11-03 02:44:22,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:44:22,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-11-03 02:44:22,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:22,135 INFO L225 Difference]: With dead ends: 20 [2022-11-03 02:44:22,135 INFO L226 Difference]: Without dead ends: 8 [2022-11-03 02:44:22,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:22,151 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:22,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:44:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-03 02:44:22,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-03 02:44:22,189 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) [2022-11-03 02:44:22,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-11-03 02:44:22,192 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2022-11-03 02:44:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:22,193 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-11-03 02:44:22,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-03 02:44:22,193 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-11-03 02:44:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:44:22,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:22,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:22,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:22,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:22,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:22,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2022-11-03 02:44:22,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:22,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641011131] [2022-11-03 02:44:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:22,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:22,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:22,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:22,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:44:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:24,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:44:24,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:34,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:42,791 WARN L833 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|)) is different from false [2022-11-03 02:44:50,298 WARN L833 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from false [2022-11-03 02:44:52,593 WARN L855 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2022-11-03 02:44:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-03 02:44:52,594 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:52,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641011131] [2022-11-03 02:44:52,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641011131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:52,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2130811778] [2022-11-03 02:44:52,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:52,595 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:52,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:44:52,600 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:44:52,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-03 02:44:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:55,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:44:55,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:58,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-03 02:45:07,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2130811778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:07,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224513960] [2022-11-03 02:45:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:07,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:07,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:07,482 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:07,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:45:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:18,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:45:18,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:45,672 WARN L234 SmtUtils]: Spent 11.81s 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) [2022-11-03 02:45:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:45,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:58,999 WARN L833 $PredicateComparison]: unable to prove that (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|))) is different from false [2022-11-03 02:46:01,140 WARN L855 $PredicateComparison]: unable to prove that (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|))) is different from true [2022-11-03 02:46:08,020 WARN L234 SmtUtils]: Spent 6.88s on a formula simplification. DAG size of input: 9 DAG size of output: 1 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:46:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-03 02:46:12,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224513960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:12,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:46:12,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 6] total 12 [2022-11-03 02:46:12,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171623100] [2022-11-03 02:46:12,575 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:46:12,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:46:12,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:46:12,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:46:12,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=63, Unknown=7, NotChecked=54, Total=156 [2022-11-03 02:46:12,577 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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) [2022-11-03 02:46:14,889 WARN L855 $PredicateComparison]: unable to prove that (and (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2022-11-03 02:46:17,032 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0) |c_ULTIMATE.start_main_~x1~0#1|)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)) (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) .cse1) .cse1 (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2022-11-03 02:46:19,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:46:21,662 WARN L539 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 [] [2022-11-03 02:46:22,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:22,489 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2022-11-03 02:46:22,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:46:22,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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 [2022-11-03 02:46:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:22,490 INFO L225 Difference]: With dead ends: 13 [2022-11-03 02:46:22,490 INFO L226 Difference]: Without dead ends: 9 [2022-11-03 02:46:22,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=36, Invalid=65, Unknown=9, NotChecked=100, Total=210 [2022-11-03 02:46:22,492 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:22,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 2 Unknown, 14 Unchecked, 5.5s Time] [2022-11-03 02:46:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-03 02:46:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-03 02:46:22,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2022-11-03 02:46:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-03 02:46:22,496 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2022-11-03 02:46:22,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:22,496 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-03 02:46:22,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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) [2022-11-03 02:46:22,496 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-03 02:46:22,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:46:22,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:22,497 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:22,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 02:46:22,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:22,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2022-11-03 02:46:23,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:46:23,108 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:23,108 INFO L85 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2022-11-03 02:46:23,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:46:23,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876271913] [2022-11-03 02:46:23,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:46:23,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:46:23,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:46:23,111 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:46:23,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:46:25,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:46:25,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:46:25,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:46:25,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:36,390 WARN L234 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:46:47,532 WARN L234 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:46:57,507 WARN L234 SmtUtils]: Spent 5.78s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:46:59,908 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~x~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0)) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2022-11-03 02:46:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 02:46:59,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:08,296 WARN L833 $PredicateComparison]: unable to prove that (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|))) is different from false [2022-11-03 02:47:10,420 WARN L855 $PredicateComparison]: unable to prove that (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|))) is different from true [2022-11-03 02:47:20,326 WARN L234 SmtUtils]: Spent 5.09s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:47:22,591 WARN L833 $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_~x1~0#1| .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 [2022-11-03 02:47:24,849 WARN L855 $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_~x1~0#1| .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 [2022-11-03 02:47:30,185 WARN L234 SmtUtils]: Spent 5.33s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:47:35,835 WARN L234 SmtUtils]: Spent 5.65s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:47:38,215 WARN L833 $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 ((_ to_fp 11 53) c_currentRoundingMode 1.0) .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 [2022-11-03 02:47:40,608 WARN L855 $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 ((_ to_fp 11 53) c_currentRoundingMode 1.0) .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 [2022-11-03 02:47:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-03 02:47:40,609 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:40,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876271913] [2022-11-03 02:47:40,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876271913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:40,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2077467178] [2022-11-03 02:47:40,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:47:40,610 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:40,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:47:40,611 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:47:40,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 02:47:44,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:47:44,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:44,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:47:44,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:52,042 WARN L234 SmtUtils]: Spent 5.10s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:48:01,907 WARN L234 SmtUtils]: Spent 5.68s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:48:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 02:48:01,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:19,023 WARN L234 SmtUtils]: Spent 5.11s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:48:24,443 WARN L234 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:48:30,130 WARN L234 SmtUtils]: Spent 5.69s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:48:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-03 02:48:30,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2077467178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:30,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102461804] [2022-11-03 02:48:30,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:30,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:30,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:30,134 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:30,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:48:39,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:39,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:39,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:48:39,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:45,923 WARN L234 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:48:54,245 WARN L234 SmtUtils]: Spent 5.75s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:48:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 02:48:54,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:11,663 WARN L234 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:49:17,069 WARN L234 SmtUtils]: Spent 5.40s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:49:22,834 WARN L234 SmtUtils]: Spent 5.76s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:49:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-03 02:49:22,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102461804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:22,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:49:22,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5, 7, 5, 7] total 11 [2022-11-03 02:49:22,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81671263] [2022-11-03 02:49:22,836 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:49:22,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:49:22,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:22,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:49:22,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=39, Unknown=9, NotChecked=60, Total=132 [2022-11-03 02:49:22,838 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 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) [2022-11-03 02:49:25,310 WARN L855 $PredicateComparison]: unable to prove that (and (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))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2022-11-03 02:49:27,721 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)) (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse1 .cse0) .cse1)) (fp.eq .cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from false [2022-11-03 02:49:30,004 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)) (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse1 .cse0) .cse1)) (fp.eq .cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from true [2022-11-03 02:49:32,844 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0) |c_ULTIMATE.start_main_~x1~0#1|))) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2022-11-03 02:50:01,918 WARN L234 SmtUtils]: Spent 21.72s on a formula simplification. DAG size of input: 21 DAG size of output: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:50:04,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:09,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:12,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:13,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:13,055 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-11-03 02:50:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:50:13,056 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 02:50:13,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:13,057 INFO L225 Difference]: With dead ends: 17 [2022-11-03 02:50:13,057 INFO L226 Difference]: Without dead ends: 11 [2022-11-03 02:50:13,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 71.9s TimeCoverageRelationStatistics Valid=53, Invalid=92, Unknown=15, NotChecked=182, Total=342 [2022-11-03 02:50:13,059 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:13,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 11 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 2 Unknown, 30 Unchecked, 9.0s Time] [2022-11-03 02:50:13,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-03 02:50:13,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-03 02:50:13,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2022-11-03 02:50:13,063 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2022-11-03 02:50:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:13,063 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2022-11-03 02:50:13,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 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) [2022-11-03 02:50:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2022-11-03 02:50:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:50:13,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:13,064 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:13,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:13,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:13,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:13,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:50:13,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:13,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 3 times [2022-11-03 02:50:13,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:13,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693473189] [2022-11-03 02:50:13,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:50:13,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:13,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:13,678 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:13,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:50:17,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:50:17,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:50:17,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:50:17,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:27,571 WARN L234 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:50:39,597 WARN L234 SmtUtils]: Spent 7.45s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:50:45,486 WARN L234 SmtUtils]: Spent 5.85s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:51:03,590 WARN L234 SmtUtils]: Spent 8.24s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:51:10,107 WARN L234 SmtUtils]: Spent 6.47s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:51:12,640 WARN L855 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_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 [2022-11-03 02:51:21,956 WARN L234 SmtUtils]: Spent 6.88s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:51:24,426 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~x~0#1| (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_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2022-11-03 02:51:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 3 times theorem prover too weak. 0 trivial. 7 not checked. [2022-11-03 02:51:24,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:34,827 WARN L833 $PredicateComparison]: unable to prove that (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|))) is different from false [2022-11-03 02:51:36,973 WARN L855 $PredicateComparison]: unable to prove that (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|))) is different from true [2022-11-03 02:51:46,927 WARN L234 SmtUtils]: Spent 5.11s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:51:49,215 WARN L833 $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_~x1~0#1| .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 [2022-11-03 02:51:51,497 WARN L855 $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_~x1~0#1| .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 [2022-11-03 02:51:56,956 WARN L234 SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:52:02,744 WARN L234 SmtUtils]: Spent 5.79s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:52:05,159 WARN L833 $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_~x1~0#1| .cse1) .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 [2022-11-03 02:52:07,600 WARN L855 $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_~x1~0#1| .cse1) .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 [2022-11-03 02:52:13,646 WARN L234 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:52:20,135 WARN L234 SmtUtils]: Spent 6.49s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:52:22,701 WARN L833 $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_~x1~0#1| .cse1) .cse1) .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 [2022-11-03 02:52:25,278 WARN L855 $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_~x1~0#1| .cse1) .cse1) .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 [2022-11-03 02:52:27,429 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-11-03 02:52:27,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-11-03 02:52:27,431 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:27,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693473189] [2022-11-03 02:52:27,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/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") [2022-11-03 02:52:27,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1457238754] [2022-11-03 02:52:27,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:52:27,432 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:27,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:52:27,433 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:52:27,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 02:52:34,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:52:34,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:52:34,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:52:34,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:34,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2022-11-03 02:52:34,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740987654] [2022-11-03 02:52:34,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:52:34,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:34,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:34,896 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:34,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:53:57,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:53:57,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:57,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:53:57,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:57,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2022-11-03 02:53:57,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:57,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2022-11-03 02:53:57,904 ERROR L170 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2022-11-03 02:53:57,904 INFO L359 BasicCegarLoop]: Counterexample might be feasible [2022-11-03 02:53:57,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:53:57,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:58,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:58,515 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forcibly destroying the process [2022-11-03 02:53:58,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:58,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0858c182-7d40-4d9d-b45b-864ba3cbae66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:58,556 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1] [2022-11-03 02:53:58,558 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:53:58,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:53:58 BoogieIcfgContainer [2022-11-03 02:53:58,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:53:58,569 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:53:58,569 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:53:58,569 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:53:58,570 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:44:08" (3/4) ... [2022-11-03 02:53:58,573 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:53:58,573 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:53:58,574 INFO L158 Benchmark]: Toolchain (without parser) took 594841.50ms. Allocated memory is still 67.1MB. Free memory was 48.4MB in the beginning and 42.3MB in the end (delta: 6.1MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. [2022-11-03 02:53:58,574 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 67.1MB. Free memory was 47.6MB in the beginning and 47.6MB in the end (delta: 49.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:53:58,574 INFO L158 Benchmark]: CACSL2BoogieTranslator took 341.67ms. Allocated memory is still 67.1MB. Free memory was 48.1MB in the beginning and 49.5MB in the end (delta: -1.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:53:58,575 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.83ms. Allocated memory is still 67.1MB. Free memory was 49.3MB in the beginning and 48.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:53:58,575 INFO L158 Benchmark]: Boogie Preprocessor took 23.88ms. Allocated memory is still 67.1MB. Free memory was 48.0MB in the beginning and 46.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:53:58,575 INFO L158 Benchmark]: RCFGBuilder took 4555.36ms. Allocated memory is still 67.1MB. Free memory was 46.8MB in the beginning and 37.7MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:53:58,576 INFO L158 Benchmark]: TraceAbstraction took 589879.53ms. Allocated memory is still 67.1MB. Free memory was 37.1MB in the beginning and 42.8MB in the end (delta: -5.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:53:58,576 INFO L158 Benchmark]: Witness Printer took 4.21ms. Allocated memory is still 67.1MB. Free memory was 42.8MB in the beginning and 42.3MB in the end (delta: 456.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:53:58,578 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 67.1MB. Free memory was 47.6MB in the beginning and 47.6MB in the end (delta: 49.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 341.67ms. Allocated memory is still 67.1MB. Free memory was 48.1MB in the beginning and 49.5MB in the end (delta: -1.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.83ms. Allocated memory is still 67.1MB. Free memory was 49.3MB in the beginning and 48.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 23.88ms. Allocated memory is still 67.1MB. Free memory was 48.0MB in the beginning and 46.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 4555.36ms. Allocated memory is still 67.1MB. Free memory was 46.8MB in the beginning and 37.7MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 589879.53ms. Allocated memory is still 67.1MB. Free memory was 37.1MB in the beginning and 42.8MB in the end (delta: -5.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.21ms. Allocated memory is still 67.1MB. Free memory was 42.8MB in the beginning and 42.3MB in the end (delta: 456.0kB). 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: 13]: 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: [L20] double x = 1.0; [L21] double x1 = x/1.6; [L23] COND TRUE x1 != x [L25] x = x1 [L26] x1 = x/1.6 [L23] COND TRUE x1 != x [L25] x = x1 [L26] x1 = x/1.6 [L23] COND TRUE x1 != x [L25] x = x1 [L26] x1 = x/1.6 [L23] COND TRUE x1 != x [L25] x = x1 [L26] x1 = x/1.6 [L23] COND FALSE !(x1 != x) [L29] CALL __VERIFIER_assert(x == 0) [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 589.8s, OverallIterations: 4, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 67.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 20 SdHoareTripleChecker+Valid, 16.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20 mSDsluCounter, 48 SdHoareTripleChecker+Invalid, 15.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 44 IncrementalHoareTripleChecker+Unchecked, 32 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 38 IncrementalHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 16 mSDtfsCounter, 38 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 123.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 19, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 34.5s SatisfiabilityAnalysisTime, 395.1s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 951 SizeOfPredicates, 27 NumberOfNonLiveVariables, 199 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 14 InterpolantComputations, 1 PerfectInterpolantSequences, 0/34 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