./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P --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 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:51:56,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:51:56,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:51:56,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:51:56,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:51:56,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:51:56,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:51:56,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:51:56,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:51:56,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:51:56,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:51:56,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:51:56,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:51:56,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:51:56,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:51:56,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:51:56,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:51:56,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:51:56,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:51:56,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:51:56,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:51:56,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:51:56,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:51:56,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:51:56,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:51:56,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:51:56,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:51:56,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:51:56,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:51:56,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:51:56,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:51:56,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:51:56,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:51:56,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:51:56,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:51:56,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:51:56,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:51:56,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:51:56,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:51:56,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:51:56,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:51:56,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:51:56,288 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:51:56,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:51:56,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:51:56,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:51:56,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:51:56,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:51:56,297 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:51:56,297 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:51:56,298 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:51:56,298 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:51:56,299 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:51:56,299 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:51:56,299 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:51:56,299 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:51:56,300 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:51:56,300 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:51:56,300 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:51:56,300 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:51:56,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:51:56,301 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:51:56,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:51:56,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:51:56,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:51:56,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:51:56,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:51:56,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:51:56,304 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:51:56,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:51:56,305 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:51:56,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:51:56,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:51:56,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:51:56,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:51:56,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:51:56,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:51:56,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:51:56,307 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:51:56,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:51:56,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:51:56,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:51:56,308 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:51:56,308 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d [2021-11-21 00:51:56,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:51:56,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:51:56,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:51:56,584 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:51:56,585 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:51:56,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-11-21 00:51:56,671 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/data/6b75ea216/bb3150b44eed44cd8b3e422de97113a8/FLAG77ceea287 [2021-11-21 00:51:57,073 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:51:57,073 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-11-21 00:51:57,079 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/data/6b75ea216/bb3150b44eed44cd8b3e422de97113a8/FLAG77ceea287 [2021-11-21 00:51:57,488 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/data/6b75ea216/bb3150b44eed44cd8b3e422de97113a8 [2021-11-21 00:51:57,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:51:57,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:51:57,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:51:57,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:51:57,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:51:57,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:51:57" (1/1) ... [2021-11-21 00:51:57,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31f9af91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:51:57, skipping insertion in model container [2021-11-21 00:51:57,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:51:57" (1/1) ... [2021-11-21 00:51:57,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:51:57,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:51:57,699 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_a5f54601-71a7-4439-9a73-af43f09659d5/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-11-21 00:51:57,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:51:57,724 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:51:57,735 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_a5f54601-71a7-4439-9a73-af43f09659d5/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-11-21 00:51:57,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:51:57,749 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:51:57,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:51:57 WrapperNode [2021-11-21 00:51:57,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:51:57,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:51:57,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:51:57,751 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:51:57,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:51:57" (1/1) ... [2021-11-21 00:51:57,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:51:57" (1/1) ... [2021-11-21 00:51:57,782 INFO L137 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2021-11-21 00:51:57,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:51:57,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:51:57,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:51:57,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:51:57,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:51:57" (1/1) ... [2021-11-21 00:51:57,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:51:57" (1/1) ... [2021-11-21 00:51:57,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:51:57" (1/1) ... [2021-11-21 00:51:57,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:51:57" (1/1) ... [2021-11-21 00:51:57,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:51:57" (1/1) ... [2021-11-21 00:51:57,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:51:57" (1/1) ... [2021-11-21 00:51:57,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:51:57" (1/1) ... [2021-11-21 00:51:57,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:51:57,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:51:57,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:51:57,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:51:57,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:51:57" (1/1) ... [2021-11-21 00:51:57,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:51:57,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:51:57,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:51:57,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:51:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:51:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:51:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:51:57,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:51:57,923 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:51:57,924 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:51:57,999 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:51:58,016 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:51:58,017 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:51:58,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:51:58 BoogieIcfgContainer [2021-11-21 00:51:58,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:51:58,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:51:58,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:51:58,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:51:58,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:51:57" (1/3) ... [2021-11-21 00:51:58,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a80aca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:51:58, skipping insertion in model container [2021-11-21 00:51:58,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:51:57" (2/3) ... [2021-11-21 00:51:58,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a80aca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:51:58, skipping insertion in model container [2021-11-21 00:51:58,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:51:58" (3/3) ... [2021-11-21 00:51:58,027 INFO L111 eAbstractionObserver]: Analyzing ICFG Float_div_bad.i [2021-11-21 00:51:58,033 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:51:58,033 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:51:58,078 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:51:58,086 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:51:58,086 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:51:58,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:51:58,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 00:51:58,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:58,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 00:51:58,107 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:51:58,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:58,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1880294, now seen corresponding path program 1 times [2021-11-21 00:51:58,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:58,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54450919] [2021-11-21 00:51:58,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:58,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:51:58,205 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 00:51:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:51:58,233 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 00:51:58,235 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 00:51:58,237 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 00:51:58,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:51:58,243 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-21 00:51:58,246 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:51:58,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:51:58 BoogieIcfgContainer [2021-11-21 00:51:58,263 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:51:58,264 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:51:58,264 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:51:58,264 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:51:58,265 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:51:58" (3/4) ... [2021-11-21 00:51:58,268 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 00:51:58,268 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:51:58,270 INFO L158 Benchmark]: Toolchain (without parser) took 777.08ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 55.8MB in the beginning and 61.8MB in the end (delta: -6.0MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. [2021-11-21 00:51:58,270 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 88.1MB. Free memory was 40.6MB in the beginning and 40.5MB in the end (delta: 45.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:51:58,271 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.35ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 55.7MB in the beginning and 86.2MB in the end (delta: -30.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:51:58,272 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.21ms. Allocated memory is still 109.1MB. Free memory was 85.8MB in the beginning and 84.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:51:58,272 INFO L158 Benchmark]: Boogie Preprocessor took 19.43ms. Allocated memory is still 109.1MB. Free memory was 84.5MB in the beginning and 83.6MB in the end (delta: 884.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:51:58,273 INFO L158 Benchmark]: RCFGBuilder took 215.31ms. Allocated memory is still 109.1MB. Free memory was 83.6MB in the beginning and 74.9MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:51:58,274 INFO L158 Benchmark]: TraceAbstraction took 242.76ms. Allocated memory is still 109.1MB. Free memory was 74.4MB in the beginning and 62.3MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 00:51:58,274 INFO L158 Benchmark]: Witness Printer took 4.20ms. Allocated memory is still 109.1MB. Free memory was 62.3MB in the beginning and 61.8MB in the end (delta: 548.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:51:58,278 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 88.1MB. Free memory was 40.6MB in the beginning and 40.5MB in the end (delta: 45.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 256.35ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 55.7MB in the beginning and 86.2MB in the end (delta: -30.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.21ms. Allocated memory is still 109.1MB. Free memory was 85.8MB in the beginning and 84.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.43ms. Allocated memory is still 109.1MB. Free memory was 84.5MB in the beginning and 83.6MB in the end (delta: 884.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 215.31ms. Allocated memory is still 109.1MB. Free memory was 83.6MB in the beginning and 74.9MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 242.76ms. Allocated memory is still 109.1MB. Free memory was 74.4MB in the beginning and 62.3MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Witness Printer took 4.20ms. Allocated memory is still 109.1MB. Free memory was 62.3MB in the beginning and 61.8MB in the end (delta: 548.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 23, overapproximation of someBinaryArithmeticFLOAToperation at line 21. Possible FailurePath: [L20] float x = 1.0f; [L21] float x1 = x/1.6f; 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, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-21 00:51:58,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P --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 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:52:00,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:52:00,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:52:00,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:52:00,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:52:00,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:52:00,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:52:00,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:52:00,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:52:00,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:52:00,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:52:00,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:52:00,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:52:00,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:52:00,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:52:00,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:52:00,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:52:00,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:52:00,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:52:00,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:52:00,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:52:00,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:52:00,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:52:00,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:52:00,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:52:00,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:52:00,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:52:00,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:52:00,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:52:00,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:52:00,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:52:00,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:52:00,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:52:00,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:52:00,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:52:00,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:52:00,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:52:00,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:52:00,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:52:00,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:52:00,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:52:00,888 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 00:52:00,929 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:52:00,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:52:00,931 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:52:00,931 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:52:00,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:52:00,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:52:00,932 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:52:00,932 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:52:00,933 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:52:00,933 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:52:00,934 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:52:00,934 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:52:00,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:52:00,936 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:52:00,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:52:00,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:52:00,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:52:00,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:52:00,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:52:00,938 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 00:52:00,938 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 00:52:00,938 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:52:00,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:52:00,938 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:52:00,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:52:00,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:52:00,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 00:52:00,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:52:00,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:52:00,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:52:00,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:52:00,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:52:00,941 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 00:52:00,942 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 00:52:00,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:52:00,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:52:00,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:52:00,943 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_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d [2021-11-21 00:52:01,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:52:01,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:52:01,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:52:01,363 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:52:01,363 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:52:01,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-11-21 00:52:01,445 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/data/a722ffee0/a0608de81c4c467dafdbc44998050798/FLAG085d3aa44 [2021-11-21 00:52:01,944 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:52:01,944 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-11-21 00:52:01,951 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/data/a722ffee0/a0608de81c4c467dafdbc44998050798/FLAG085d3aa44 [2021-11-21 00:52:02,316 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/data/a722ffee0/a0608de81c4c467dafdbc44998050798 [2021-11-21 00:52:02,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:52:02,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:52:02,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:52:02,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:52:02,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:52:02,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:52:02" (1/1) ... [2021-11-21 00:52:02,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@184bf271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:52:02, skipping insertion in model container [2021-11-21 00:52:02,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:52:02" (1/1) ... [2021-11-21 00:52:02,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:52:02,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:52:02,559 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_a5f54601-71a7-4439-9a73-af43f09659d5/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-11-21 00:52:02,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:52:02,586 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:52:02,606 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_a5f54601-71a7-4439-9a73-af43f09659d5/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-11-21 00:52:02,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:52:02,649 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:52:02,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:52:02 WrapperNode [2021-11-21 00:52:02,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:52:02,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:52:02,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:52:02,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:52:02,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:52:02" (1/1) ... [2021-11-21 00:52:02,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:52:02" (1/1) ... [2021-11-21 00:52:02,687 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2021-11-21 00:52:02,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:52:02,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:52:02,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:52:02,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:52:02,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:52:02" (1/1) ... [2021-11-21 00:52:02,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:52:02" (1/1) ... [2021-11-21 00:52:02,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:52:02" (1/1) ... [2021-11-21 00:52:02,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:52:02" (1/1) ... [2021-11-21 00:52:02,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:52:02" (1/1) ... [2021-11-21 00:52:02,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:52:02" (1/1) ... [2021-11-21 00:52:02,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:52:02" (1/1) ... [2021-11-21 00:52:02,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:52:02,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:52:02,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:52:02,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:52:02,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:52:02" (1/1) ... [2021-11-21 00:52:02,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:52:02,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:52:02,773 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:52:02,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:52:02,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:52:02,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 00:52:02,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:52:02,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:52:02,894 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:52:02,896 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:52:03,631 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:52:03,637 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:52:03,637 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:52:03,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:52:03 BoogieIcfgContainer [2021-11-21 00:52:03,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:52:03,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:52:03,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:52:03,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:52:03,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:52:02" (1/3) ... [2021-11-21 00:52:03,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28268f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:52:03, skipping insertion in model container [2021-11-21 00:52:03,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:52:02" (2/3) ... [2021-11-21 00:52:03,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28268f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:52:03, skipping insertion in model container [2021-11-21 00:52:03,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:52:03" (3/3) ... [2021-11-21 00:52:03,647 INFO L111 eAbstractionObserver]: Analyzing ICFG Float_div_bad.i [2021-11-21 00:52:03,653 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:52:03,653 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:52:03,698 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:52:03,706 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:52:03,706 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:52:03,719 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) [2021-11-21 00:52:03,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:52:03,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:03,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:52:03,725 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:52:03,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:03,731 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-11-21 00:52:03,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:52:03,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146207492] [2021-11-21 00:52:03,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:03,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:52:03,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:52:03,750 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:52:03,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 00:52:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:04,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:52:04,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:52:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:52:05,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:52:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:52:06,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:52:06,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146207492] [2021-11-21 00:52:06,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146207492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:52:06,076 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:52:06,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 00:52:06,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543764785] [2021-11-21 00:52:06,078 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:52:06,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:52:06,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:52:06,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:52:06,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:52:06,111 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 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2021-11-21 00:52:09,289 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:09,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:52:09,436 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2021-11-21 00:52:09,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:52:09,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) Word has length 6 [2021-11-21 00:52:09,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:52:09,446 INFO L225 Difference]: With dead ends: 21 [2021-11-21 00:52:09,447 INFO L226 Difference]: Without dead ends: 9 [2021-11-21 00:52:09,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:52:09,459 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:52:09,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-21 00:52:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-21 00:52:09,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-21 00:52:09,485 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) [2021-11-21 00:52:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-21 00:52:09,486 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-11-21 00:52:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:52:09,486 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-21 00:52:09,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2021-11-21 00:52:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-21 00:52:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:52:09,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:09,488 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:52:09,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-21 00:52:09,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:52:09,689 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:52:09,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:09,690 INFO L85 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 1 times [2021-11-21 00:52:09,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:52:09,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827007426] [2021-11-21 00:52:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:09,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:52:09,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:52:09,693 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:52:09,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 00:52:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:10,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:52:10,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:52:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:52:17,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:52:33,291 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from false [2021-11-21 00:52:35,345 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2021-11-21 00:52:41,569 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from false [2021-11-21 00:52:43,653 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2021-11-21 00:52:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-21 00:52:43,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:52:43,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827007426] [2021-11-21 00:52:43,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827007426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:52:43,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1845948591] [2021-11-21 00:52:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:43,656 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:52:43,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:52:43,659 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:52:43,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-21 00:52:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:44,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:52:44,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:52:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:52:47,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:52:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-21 00:52:57,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1845948591] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:52:57,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959817447] [2021-11-21 00:52:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:57,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:52:57,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:52:57,030 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:52:57,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:53:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:05,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:53:05,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:53:20,982 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0)) (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) |c_ULTIMATE.start_main_~x~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-21 00:53:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-21 00:53:21,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:53:33,318 WARN L860 $PredicateComparison]: unable to prove that (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|))) is different from true [2021-11-21 00:53:46,538 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 |c_ULTIMATE.start_main_~x1~0#1|)))) is different from true [2021-11-21 00:53:52,514 WARN L227 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 10 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:54:03,113 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 .cse1) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)))))) is different from false [2021-11-21 00:54:05,204 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 .cse1) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)))))) is different from true [2021-11-21 00:54:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-21 00:54:05,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959817447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:54:05,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:54:05,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 7] total 17 [2021-11-21 00:54:05,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575081037] [2021-11-21 00:54:05,207 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:54:05,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 00:54:05,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:54:05,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 00:54:05,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=100, Unknown=12, NotChecked=150, Total=306 [2021-11-21 00:54:05,211 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:54:08,012 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse3))) (let ((.cse1 (fp.div c_currentRoundingMode .cse2 .cse3))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode .cse1 .cse3) .cse1)))) (and .cse0 (= c_currentRoundingMode roundNearestTiesToEven) (or (fp.eq .cse1 .cse2) .cse0)))))) is different from true [2021-11-21 00:54:10,079 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2))) (let ((.cse1 (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)))) (and (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) .cse1 (fp.eq .cse0 |c_ULTIMATE.start_main_~x1~0#1|)) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse2)) .cse1 (= c_currentRoundingMode roundNearestTiesToEven))))) is different from true [2021-11-21 00:54:29,132 WARN L227 SmtUtils]: Spent 14.82s on a formula simplification. DAG size of input: 22 DAG size of output: 14 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:54:46,549 WARN L227 SmtUtils]: Spent 13.28s on a formula simplification. DAG size of input: 22 DAG size of output: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:54:48,126 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 00:55:07,911 WARN L227 SmtUtils]: Spent 5.08s 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) [2021-11-21 00:55:10,250 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 00:55:13,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 00:55:15,379 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 00:55:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:16,260 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-11-21 00:55:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:55:16,261 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:55:16,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:16,262 INFO L225 Difference]: With dead ends: 16 [2021-11-21 00:55:16,262 INFO L226 Difference]: Without dead ends: 12 [2021-11-21 00:55:16,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 104.0s TimeCoverageRelationStatistics Valid=78, Invalid=173, Unknown=21, NotChecked=280, Total=552 [2021-11-21 00:55:16,265 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:16,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 2 Unknown, 49 Unchecked, 10.8s Time] [2021-11-21 00:55:16,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-21 00:55:16,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-21 00:55:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-11-21 00:55:16,269 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2021-11-21 00:55:16,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:16,269 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-11-21 00:55:16,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-11-21 00:55:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:55:16,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:16,270 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:16,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:55:16,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:55:16,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-21 00:55:16,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:16,871 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 2 times [2021-11-21 00:55:16,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:55:16,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76935612] [2021-11-21 00:55:16,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:55:16,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:55:16,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:55:16,876 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:55:16,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 00:55:17,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:55:17,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:55:17,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 00:55:17,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:55:31,864 WARN L860 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0)))) is different from true [2021-11-21 00:55:51,150 WARN L227 SmtUtils]: Spent 6.42s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:56:15,178 WARN L227 SmtUtils]: Spent 6.64s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:56:43,998 WARN L227 SmtUtils]: Spent 7.47s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:56:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 8 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-21 00:56:46,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:57:16,135 WARN L227 SmtUtils]: Spent 6.50s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:57:26,139 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2021-11-21 00:57:28,206 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2021-11-21 00:57:38,964 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) 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 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2021-11-21 00:57:41,063 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) 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 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2021-11-21 00:57:52,083 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) 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 (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-11-21 00:57:54,214 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) 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 (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-11-21 00:58:05,410 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2021-11-21 00:58:07,565 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2021-11-21 00:58:18,891 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-11-21 00:58:21,081 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-11-21 00:58:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 14 not checked. [2021-11-21 00:58:21,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:58:21,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76935612] [2021-11-21 00:58:21,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76935612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:58:21,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2008694790] [2021-11-21 00:58:21,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:58:21,083 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:58:21,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:58:21,087 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:58:21,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-21 00:58:22,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:58:22,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:58:22,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 00:58:22,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:58:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 8 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-21 00:58:48,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 14 not checked. [2021-11-21 00:59:37,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2008694790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:59:37,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509535934] [2021-11-21 00:59:37,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:59:37,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:37,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:37,347 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:37,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:00:02,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:00:02,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:00:03,032 WARN L261 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:00:03,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:41,403 WARN L227 SmtUtils]: Spent 6.37s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:02:07,081 WARN L227 SmtUtils]: Spent 7.72s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:02:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 11 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:23,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:31,023 WARN L860 $PredicateComparison]: unable to prove that (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|))) is different from true [2021-11-21 01:02:49,990 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) (fp.eq .cse0 |c_ULTIMATE.start_main_~x1~0#1|)))) is different from false [2021-11-21 01:02:52,071 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) (fp.eq .cse0 |c_ULTIMATE.start_main_~x1~0#1|)))) is different from true [2021-11-21 01:03:10,294 WARN L227 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 6 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:03:16,721 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) (fp.eq .cse0 .cse1) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)))))) is different from false [2021-11-21 01:03:18,840 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) (fp.eq .cse0 .cse1) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)))))) is different from true [2021-11-21 01:03:38,897 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 .cse2))))) is different from false [2021-11-21 01:03:41,059 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 .cse2))))) is different from true [2021-11-21 01:03:56,996 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2))))) is different from false [2021-11-21 01:03:59,198 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2))))) is different from true [2021-11-21 01:04:15,433 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))))) is different from false [2021-11-21 01:04:17,673 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))))) is different from true [2021-11-21 01:04:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2021-11-21 01:04:17,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509535934] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:17,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:04:17,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8, 10, 8, 10] total 26 [2021-11-21 01:04:17,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462404690] [2021-11-21 01:04:17,675 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:04:17,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-21 01:04:17,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:04:17,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-21 01:04:17,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=115, Unknown=77, NotChecked=444, Total=702 [2021-11-21 01:04:17,678 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:04:20,952 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:04:23,254 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse4) .cse4) .cse4) .cse4))) (let ((.cse1 (fp.div c_currentRoundingMode .cse2 .cse4))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode .cse1 .cse4) .cse1))) (.cse3 (fp.eq .cse1 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))) (and (or .cse0 (fp.eq .cse1 .cse2) .cse3) (or .cse0 .cse3) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from true [2021-11-21 01:04:25,443 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse3 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse4) .cse4) .cse4))) (let ((.cse2 (fp.div c_currentRoundingMode .cse3 .cse4))) (let ((.cse0 (fp.eq .cse2 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) (.cse1 (not (fp.eq (fp.div c_currentRoundingMode .cse2 .cse4) .cse2)))) (and (or .cse0 .cse1 (fp.eq .cse2 .cse3)) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse4)) (or .cse0 .cse1) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from false [2021-11-21 01:04:27,646 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse3 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse4) .cse4) .cse4))) (let ((.cse2 (fp.div c_currentRoundingMode .cse3 .cse4))) (let ((.cse0 (fp.eq .cse2 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) (.cse1 (not (fp.eq (fp.div c_currentRoundingMode .cse2 .cse4) .cse2)))) (and (or .cse0 .cse1 (fp.eq .cse2 .cse3)) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse4)) (or .cse0 .cse1) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from true [2021-11-21 01:04:29,815 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse4 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0) .cse0))) (let ((.cse3 (fp.div c_currentRoundingMode .cse4 .cse0))) (let ((.cse1 (not (fp.eq (fp.div c_currentRoundingMode .cse3 .cse0) .cse3))) (.cse2 (fp.eq .cse3 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))) (and (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) |c_ULTIMATE.start_main_~x1~0#1|) (or .cse1 .cse2 (fp.eq .cse3 .cse4)) (or .cse1 .cse2) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from true [2021-11-21 01:04:31,908 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse5 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2))) (let ((.cse4 (fp.div c_currentRoundingMode .cse5 .cse2))) (let ((.cse0 (fp.eq .cse4 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) (.cse1 (not (fp.eq (fp.div c_currentRoundingMode .cse4 .cse2) .cse4))) (.cse3 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse2) .cse2))) (and (or .cse0 .cse1) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse2)) (= .cse3 |c_ULTIMATE.start_main_~x~0#1|) (or .cse0 (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) (fp.eq .cse4 .cse5) .cse1) (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode .cse3 .cse2))))))) is different from false [2021-11-21 01:04:34,032 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse5 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2))) (let ((.cse4 (fp.div c_currentRoundingMode .cse5 .cse2))) (let ((.cse0 (fp.eq .cse4 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) (.cse1 (not (fp.eq (fp.div c_currentRoundingMode .cse4 .cse2) .cse4))) (.cse3 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse2) .cse2))) (and (or .cse0 .cse1) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse2)) (= .cse3 |c_ULTIMATE.start_main_~x~0#1|) (or .cse0 (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) (fp.eq .cse4 .cse5) .cse1) (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode .cse3 .cse2))))))) is different from true [2021-11-21 01:04:36,120 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse3 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0))) (let ((.cse1 (fp.eq .cse3 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) (.cse2 (not (fp.eq (fp.div c_currentRoundingMode .cse3 .cse0) .cse3)))) (and (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) |c_ULTIMATE.start_main_~x~0#1|) (or .cse1 .cse2) (or .cse1 .cse2 (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) (fp.eq .cse3 |c_ULTIMATE.start_main_~x1~0#1|)) (= |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 [2021-11-21 01:04:38,346 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) (.cse1 (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2) |c_ULTIMATE.start_main_~x1~0#1|)))) (and (or .cse0 .cse1) (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse2) .cse2) .cse2) .cse2) |c_ULTIMATE.start_main_~x~0#1|) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse2)) (= c_currentRoundingMode roundNearestTiesToEven) (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) .cse0 .cse1)))) is different from false [2021-11-21 01:04:40,389 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) (.cse1 (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2) |c_ULTIMATE.start_main_~x1~0#1|)))) (and (or .cse0 .cse1) (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse2) .cse2) .cse2) .cse2) |c_ULTIMATE.start_main_~x~0#1|) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse2)) (= c_currentRoundingMode roundNearestTiesToEven) (or (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) .cse0 .cse1)))) is different from true [2021-11-21 01:04:42,982 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:05:12,122 WARN L227 SmtUtils]: Spent 8.71s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:05:14,197 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:05:16,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:05:42,740 WARN L227 SmtUtils]: Spent 7.10s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:05:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:43,567 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-21 01:05:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 01:05:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 01:05:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:43,568 INFO L225 Difference]: With dead ends: 20 [2021-11-21 01:05:43,569 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 01:05:43,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 18 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 309.6s TimeCoverageRelationStatistics Valid=102, Invalid=177, Unknown=99, NotChecked=882, Total=1260 [2021-11-21 01:05:43,571 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:43,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 3 Unknown, 100 Unchecked, 12.8s Time] [2021-11-21 01:05:43,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 01:05:43,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-21 01:05:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:05:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-11-21 01:05:43,576 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2021-11-21 01:05:43,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:43,576 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-11-21 01:05:43,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:05:43,576 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-11-21 01:05:43,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:05:43,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:43,577 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:43,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:43,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 01:05:43,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-21 01:05:44,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:05:44,178 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:44,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:44,179 INFO L85 PathProgramCache]: Analyzing trace with hash 86212784, now seen corresponding path program 3 times [2021-11-21 01:05:44,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:44,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406095405] [2021-11-21 01:05:44,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:05:44,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:44,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:44,182 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:44,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5f54601-71a7-4439-9a73-af43f09659d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 01:05:45,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:05:45,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:45,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 01:05:45,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:08,310 WARN L227 SmtUtils]: Spent 5.80s 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) [2021-11-21 01:06:29,935 WARN L227 SmtUtils]: Spent 6.65s 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)