./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Float_div_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Float_div_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c9c4c4712c0b03f250e94d62f797a284bfa7b46f ........................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Float_div_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c9c4c4712c0b03f250e94d62f797a284bfa7b46f ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 16:14:19,503 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 16:14:19,504 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 16:14:19,512 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 16:14:19,512 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 16:14:19,513 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 16:14:19,514 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 16:14:19,515 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 16:14:19,516 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 16:14:19,517 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 16:14:19,517 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 16:14:19,518 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 16:14:19,519 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 16:14:19,519 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 16:14:19,520 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 16:14:19,520 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 16:14:19,521 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 16:14:19,523 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 16:14:19,524 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 16:14:19,525 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 16:14:19,525 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 16:14:19,527 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 16:14:19,528 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 16:14:19,528 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 16:14:19,528 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 16:14:19,529 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 16:14:19,529 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 16:14:19,531 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 16:14:19,531 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 16:14:19,532 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 16:14:19,532 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 16:14:19,532 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 16:14:19,533 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 16:14:19,533 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 16:14:19,533 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 16:14:19,534 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 16:14:19,535 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 16:14:19,545 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 16:14:19,545 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 16:14:19,545 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 16:14:19,546 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 16:14:19,546 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 16:14:19,546 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 16:14:19,546 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 16:14:19,546 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 16:14:19,547 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 16:14:19,547 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 16:14:19,547 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 16:14:19,547 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 16:14:19,547 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 16:14:19,547 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 16:14:19,547 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 16:14:19,548 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 16:14:19,548 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 16:14:19,548 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 16:14:19,548 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 16:14:19,548 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 16:14:19,548 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 16:14:19,548 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 16:14:19,548 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 16:14:19,549 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 16:14:19,549 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 16:14:19,549 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 16:14:19,549 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 16:14:19,549 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 16:14:19,549 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 16:14:19,549 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 16:14:19,550 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer 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(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer 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 -> c9c4c4712c0b03f250e94d62f797a284bfa7b46f [2018-11-18 16:14:19,576 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 16:14:19,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 16:14:19,587 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 16:14:19,587 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 16:14:19,588 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 16:14:19,588 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/../../sv-benchmarks/c/floats-esbmc-regression/Float_div_true-unreach-call.i [2018-11-18 16:14:19,623 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/data/4d45b901e/87f3ab8267f94e66b2a7adc3eec19741/FLAG7c8ed29c9 [2018-11-18 16:14:20,023 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 16:14:20,024 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/sv-benchmarks/c/floats-esbmc-regression/Float_div_true-unreach-call.i [2018-11-18 16:14:20,027 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/data/4d45b901e/87f3ab8267f94e66b2a7adc3eec19741/FLAG7c8ed29c9 [2018-11-18 16:14:20,036 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/data/4d45b901e/87f3ab8267f94e66b2a7adc3eec19741 [2018-11-18 16:14:20,038 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 16:14:20,039 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 16:14:20,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 16:14:20,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 16:14:20,043 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 16:14:20,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:14:20" (1/1) ... [2018-11-18 16:14:20,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b4915a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:20, skipping insertion in model container [2018-11-18 16:14:20,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:14:20" (1/1) ... [2018-11-18 16:14:20,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 16:14:20,061 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 16:14:20,161 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:14:20,163 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 16:14:20,172 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:14:20,180 INFO L195 MainTranslator]: Completed translation [2018-11-18 16:14:20,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:20 WrapperNode [2018-11-18 16:14:20,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 16:14:20,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 16:14:20,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 16:14:20,181 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 16:14:20,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:20" (1/1) ... [2018-11-18 16:14:20,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:20" (1/1) ... [2018-11-18 16:14:20,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:20" (1/1) ... [2018-11-18 16:14:20,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:20" (1/1) ... [2018-11-18 16:14:20,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:20" (1/1) ... [2018-11-18 16:14:20,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:20" (1/1) ... [2018-11-18 16:14:20,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:20" (1/1) ... [2018-11-18 16:14:20,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 16:14:20,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 16:14:20,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 16:14:20,198 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 16:14:20,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 16:14:20,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 16:14:20,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 16:14:20,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 16:14:20,265 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 16:14:20,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 16:14:20,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 16:14:20,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 16:14:20,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 16:14:20,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 16:14:20,345 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 16:14:20,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:14:20 BoogieIcfgContainer [2018-11-18 16:14:20,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 16:14:20,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 16:14:20,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 16:14:20,348 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 16:14:20,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 04:14:20" (1/3) ... [2018-11-18 16:14:20,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b9c4cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:14:20, skipping insertion in model container [2018-11-18 16:14:20,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:20" (2/3) ... [2018-11-18 16:14:20,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b9c4cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:14:20, skipping insertion in model container [2018-11-18 16:14:20,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:14:20" (3/3) ... [2018-11-18 16:14:20,351 INFO L112 eAbstractionObserver]: Analyzing ICFG Float_div_true-unreach-call.i [2018-11-18 16:14:20,357 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 16:14:20,361 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 16:14:20,370 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 16:14:20,388 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 16:14:20,388 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 16:14:20,388 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 16:14:20,388 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 16:14:20,388 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 16:14:20,388 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 16:14:20,388 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 16:14:20,389 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 16:14:20,389 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 16:14:20,400 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-18 16:14:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 16:14:20,404 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:14:20,404 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:14:20,406 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:14:20,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:14:20,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-11-18 16:14:20,410 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:14:20,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:14:20,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:14:20,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:14:20,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:14:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:14:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:14:20,478 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:14:20,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 16:14:20,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 16:14:20,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 16:14:20,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 16:14:20,490 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-18 16:14:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:14:20,501 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-18 16:14:20,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 16:14:20,502 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-18 16:14:20,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:14:20,507 INFO L225 Difference]: With dead ends: 31 [2018-11-18 16:14:20,507 INFO L226 Difference]: Without dead ends: 12 [2018-11-18 16:14:20,510 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 16:14:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-18 16:14:20,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-18 16:14:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-18 16:14:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-18 16:14:20,535 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-18 16:14:20,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:14:20,535 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-18 16:14:20,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 16:14:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-18 16:14:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 16:14:20,535 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:14:20,536 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:14:20,536 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:14:20,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:14:20,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-11-18 16:14:20,536 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:14:20,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:14:20,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:14:20,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:14:20,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:14:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:14:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:14:20,557 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 16:14:20,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 04:14:20 BoogieIcfgContainer [2018-11-18 16:14:20,570 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 16:14:20,570 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 16:14:20,571 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 16:14:20,571 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 16:14:20,571 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:14:20" (3/4) ... [2018-11-18 16:14:20,573 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-18 16:14:20,573 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 16:14:20,574 INFO L168 Benchmark]: Toolchain (without parser) took 535.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 958.0 MB in the beginning and 1.1 GB in the end (delta: -152.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:14:20,575 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:14:20,575 INFO L168 Benchmark]: CACSL2BoogieTranslator took 140.74 ms. Allocated memory is still 1.0 GB. Free memory was 958.0 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:14:20,575 INFO L168 Benchmark]: Boogie Preprocessor took 17.10 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:14:20,576 INFO L168 Benchmark]: RCFGBuilder took 147.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -186.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. [2018-11-18 16:14:20,576 INFO L168 Benchmark]: TraceAbstraction took 224.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. [2018-11-18 16:14:20,577 INFO L168 Benchmark]: Witness Printer took 2.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:14:20,579 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 140.74 ms. Allocated memory is still 1.0 GB. Free memory was 958.0 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.10 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 147.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -186.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 224.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. * Witness Printer took 2.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 2]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 12, overapproximation of someBinaryArithmeticFLOAToperation at line 10. Possible FailurePath: [L9] float x = 1.0f; [L10] float x1 = x/2.5f; VAL [x=1] [L12] COND FALSE !(x1 != x) VAL [x=1] [L18] CALL __VERIFIER_assert(x == 0) VAL [\old(cond)=0] [L2] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L2] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 0.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-5842f4b [2018-11-18 16:14:22,026 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 16:14:22,027 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 16:14:22,035 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 16:14:22,036 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 16:14:22,036 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 16:14:22,037 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 16:14:22,038 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 16:14:22,039 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 16:14:22,040 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 16:14:22,040 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 16:14:22,040 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 16:14:22,041 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 16:14:22,042 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 16:14:22,042 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 16:14:22,043 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 16:14:22,043 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 16:14:22,045 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 16:14:22,046 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 16:14:22,047 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 16:14:22,048 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 16:14:22,048 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 16:14:22,050 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 16:14:22,050 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 16:14:22,050 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 16:14:22,051 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 16:14:22,052 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 16:14:22,052 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 16:14:22,053 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 16:14:22,053 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 16:14:22,053 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 16:14:22,054 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 16:14:22,054 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 16:14:22,054 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 16:14:22,055 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 16:14:22,055 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 16:14:22,056 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-11-18 16:14:22,065 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 16:14:22,066 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 16:14:22,066 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 16:14:22,066 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 16:14:22,067 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 16:14:22,067 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 16:14:22,067 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 16:14:22,067 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 16:14:22,067 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 16:14:22,067 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 16:14:22,068 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 16:14:22,068 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 16:14:22,068 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 16:14:22,068 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 16:14:22,068 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-18 16:14:22,068 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-18 16:14:22,068 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 16:14:22,068 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 16:14:22,069 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 16:14:22,069 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 16:14:22,069 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 16:14:22,069 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 16:14:22,069 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 16:14:22,069 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 16:14:22,069 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 16:14:22,070 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 16:14:22,070 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 16:14:22,070 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 16:14:22,070 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-11-18 16:14:22,070 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 16:14:22,070 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-18 16:14:22,070 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-18 16:14:22,070 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer 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(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer 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 -> c9c4c4712c0b03f250e94d62f797a284bfa7b46f [2018-11-18 16:14:22,100 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 16:14:22,109 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 16:14:22,112 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 16:14:22,113 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 16:14:22,113 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 16:14:22,114 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/../../sv-benchmarks/c/floats-esbmc-regression/Float_div_true-unreach-call.i [2018-11-18 16:14:22,149 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/data/9a5e15659/ea8b99fd58ae48f19d9e0528397fb40b/FLAG5cfa2f19f [2018-11-18 16:14:22,476 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 16:14:22,476 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/sv-benchmarks/c/floats-esbmc-regression/Float_div_true-unreach-call.i [2018-11-18 16:14:22,480 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/data/9a5e15659/ea8b99fd58ae48f19d9e0528397fb40b/FLAG5cfa2f19f [2018-11-18 16:14:22,914 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/data/9a5e15659/ea8b99fd58ae48f19d9e0528397fb40b [2018-11-18 16:14:22,916 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 16:14:22,917 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 16:14:22,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 16:14:22,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 16:14:22,920 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 16:14:22,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:14:22" (1/1) ... [2018-11-18 16:14:22,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2435740f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:22, skipping insertion in model container [2018-11-18 16:14:22,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:14:22" (1/1) ... [2018-11-18 16:14:22,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 16:14:22,940 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 16:14:23,048 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:14:23,053 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 16:14:23,062 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:14:23,071 INFO L195 MainTranslator]: Completed translation [2018-11-18 16:14:23,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:23 WrapperNode [2018-11-18 16:14:23,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 16:14:23,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 16:14:23,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 16:14:23,073 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 16:14:23,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:23" (1/1) ... [2018-11-18 16:14:23,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:23" (1/1) ... [2018-11-18 16:14:23,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:23" (1/1) ... [2018-11-18 16:14:23,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:23" (1/1) ... [2018-11-18 16:14:23,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:23" (1/1) ... [2018-11-18 16:14:23,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:23" (1/1) ... [2018-11-18 16:14:23,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:23" (1/1) ... [2018-11-18 16:14:23,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 16:14:23,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 16:14:23,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 16:14:23,095 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 16:14:23,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 16:14:23,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 16:14:23,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 16:14:23,177 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 16:14:23,177 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 16:14:23,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 16:14:23,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 16:14:23,178 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 16:14:23,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 16:14:23,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 16:14:23,501 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 16:14:23,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:14:23 BoogieIcfgContainer [2018-11-18 16:14:23,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 16:14:23,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 16:14:23,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 16:14:23,504 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 16:14:23,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 04:14:22" (1/3) ... [2018-11-18 16:14:23,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed2015d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:14:23, skipping insertion in model container [2018-11-18 16:14:23,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:14:23" (2/3) ... [2018-11-18 16:14:23,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed2015d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:14:23, skipping insertion in model container [2018-11-18 16:14:23,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:14:23" (3/3) ... [2018-11-18 16:14:23,507 INFO L112 eAbstractionObserver]: Analyzing ICFG Float_div_true-unreach-call.i [2018-11-18 16:14:23,513 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 16:14:23,517 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 16:14:23,526 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 16:14:23,544 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 16:14:23,544 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 16:14:23,544 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 16:14:23,544 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 16:14:23,545 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 16:14:23,545 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 16:14:23,545 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 16:14:23,545 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 16:14:23,545 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 16:14:23,557 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-18 16:14:23,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 16:14:23,561 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:14:23,561 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:14:23,563 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:14:23,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:14:23,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-11-18 16:14:23,569 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 16:14:23,570 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-11-18 16:14:23,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:14:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:14:23,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:14:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:14:23,645 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 16:14:23,653 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:14:23,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 16:14:23,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 16:14:23,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 16:14:23,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 16:14:23,667 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-18 16:14:23,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:14:23,680 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-18 16:14:23,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 16:14:23,681 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-18 16:14:23,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:14:23,686 INFO L225 Difference]: With dead ends: 31 [2018-11-18 16:14:23,686 INFO L226 Difference]: Without dead ends: 12 [2018-11-18 16:14:23,688 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 16:14:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-18 16:14:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-18 16:14:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-18 16:14:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-18 16:14:23,716 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-18 16:14:23,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:14:23,716 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-18 16:14:23,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 16:14:23,716 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-18 16:14:23,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 16:14:23,716 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:14:23,717 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:14:23,717 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:14:23,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:14:23,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-11-18 16:14:23,717 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 16:14:23,718 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-11-18 16:14:23,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:14:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:14:23,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:14:24,335 WARN L180 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-18 16:14:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:14:24,341 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 16:14:24,348 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:14:24,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 16:14:24,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 16:14:24,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 16:14:24,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 16:14:24,350 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-11-18 16:14:24,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:14:24,561 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-18 16:14:24,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 16:14:24,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-18 16:14:24,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:14:24,562 INFO L225 Difference]: With dead ends: 19 [2018-11-18 16:14:24,562 INFO L226 Difference]: Without dead ends: 14 [2018-11-18 16:14:24,563 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 16:14:24,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-18 16:14:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-18 16:14:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-18 16:14:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-18 16:14:24,565 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-11-18 16:14:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:14:24,566 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-18 16:14:24,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 16:14:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-18 16:14:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 16:14:24,566 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:14:24,566 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:14:24,567 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:14:24,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:14:24,567 INFO L82 PathProgramCache]: Analyzing trace with hash -661808769, now seen corresponding path program 1 times [2018-11-18 16:14:24,567 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 16:14:24,567 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-11-18 16:14:24,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:14:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:14:24,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:14:25,365 WARN L180 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-18 16:14:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:14:25,370 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:14:27,331 WARN L180 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-11-18 16:14:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:14:27,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:14:27,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-11-18 16:14:27,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 16:14:27,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 16:14:27,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:14:27,352 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-11-18 16:14:31,705 WARN L180 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 11 [2018-11-18 16:14:34,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:14:34,669 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-11-18 16:14:34,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 16:14:34,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-11-18 16:14:34,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:14:34,671 INFO L225 Difference]: With dead ends: 25 [2018-11-18 16:14:34,671 INFO L226 Difference]: Without dead ends: 20 [2018-11-18 16:14:34,671 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-11-18 16:14:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-18 16:14:34,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-18 16:14:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-18 16:14:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-18 16:14:34,675 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2018-11-18 16:14:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:14:34,675 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-18 16:14:34,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 16:14:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-18 16:14:34,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 16:14:34,675 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:14:34,676 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:14:34,676 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:14:34,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:14:34,677 INFO L82 PathProgramCache]: Analyzing trace with hash -875350895, now seen corresponding path program 2 times [2018-11-18 16:14:34,677 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 16:14:34,677 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-11-18 16:14:34,680 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-18 16:14:34,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 16:14:34,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:14:34,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:14:35,764 WARN L180 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-18 16:14:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:14:35,769 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:14:43,319 WARN L180 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 11 [2018-11-18 16:15:17,617 WARN L180 SmtUtils]: Spent 8.26 s on a formula simplification that was a NOOP. DAG size: 12 [2018-11-18 16:15:20,665 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~x1~0 .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from true [2018-11-18 16:15:22,756 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~x1~0 .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32)))))) is different from false [2018-11-18 16:15:24,841 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~x1~0 .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32)))))) is different from true [2018-11-18 16:15:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 14 not checked. [2018-11-18 16:15:24,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:15:24,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2018-11-18 16:15:24,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 16:15:24,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 16:15:24,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=115, Unknown=10, NotChecked=46, Total=210 [2018-11-18 16:15:24,864 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 15 states. [2018-11-18 16:15:38,529 WARN L180 SmtUtils]: Spent 12.05 s on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2018-11-18 16:15:41,764 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (and (or (fp.eq c_main_~x~0 .cse0) (not (fp.eq c_main_~x1~0 c_main_~x~0))) (let ((.cse1 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~x1~0 .cse2) .cse2))) (or (fp.eq .cse1 .cse0) (not (fp.eq (fp.div roundNearestTiesToEven .cse1 .cse2) .cse1)))) (= c_main_~x1~0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven 1.0) .cse2) .cse2)))) is different from true [2018-11-18 16:15:47,212 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (and (= c_main_~x1~0 (fp.div roundNearestTiesToEven c_main_~x~0 .cse0)) (let ((.cse1 (fp.div roundNearestTiesToEven c_main_~x1~0 .cse0))) (or (fp.eq .cse1 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse1 .cse0) .cse1)))) (= (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven 1.0) .cse0) .cse0) .cse0) .cse0) c_main_~x~0))) is different from true [2018-11-18 16:15:56,084 WARN L180 SmtUtils]: Spent 3.30 s on a formula simplification that was a NOOP. DAG size: 17 [2018-11-18 16:16:20,496 WARN L180 SmtUtils]: Spent 10.32 s on a formula simplification that was a NOOP. DAG size: 15 [2018-11-18 16:16:25,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:16:25,800 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-11-18 16:16:25,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 16:16:25,800 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2018-11-18 16:16:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:16:25,801 INFO L225 Difference]: With dead ends: 34 [2018-11-18 16:16:25,801 INFO L226 Difference]: Without dead ends: 26 [2018-11-18 16:16:25,801 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 100.2s TimeCoverageRelationStatistics Valid=80, Invalid=265, Unknown=13, NotChecked=148, Total=506 [2018-11-18 16:16:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-18 16:16:25,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-18 16:16:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 16:16:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-11-18 16:16:25,805 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 19 [2018-11-18 16:16:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:16:25,805 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-11-18 16:16:25,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 16:16:25,805 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-11-18 16:16:25,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 16:16:25,806 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:16:25,806 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:16:25,806 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:16:25,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:16:25,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1788298717, now seen corresponding path program 3 times [2018-11-18 16:16:25,806 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 16:16:25,806 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2018-11-18 16:16:25,809 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-18 16:16:25,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-18 16:16:25,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:16:25,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:16:26,553 WARN L180 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-11-18 16:16:34,213 WARN L180 SmtUtils]: Spent 4.92 s on a formula simplification that was a NOOP. DAG size: 15 [2018-11-18 16:16:36,261 WARN L832 $PredicateComparison]: unable to prove that (and (exists ((v_main_~x~0_14 (_ FloatingPoint 8 24))) (and (not (fp.eq c_main_~x~0 v_main_~x~0_14)) (= c_main_~x~0 (fp.div roundNearestTiesToEven v_main_~x~0_14 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))))) (fp.eq (fp.div roundNearestTiesToEven c_main_~x~0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0))) c_main_~x~0)) is different from false [2018-11-18 16:16:38,306 WARN L854 $PredicateComparison]: unable to prove that (and (exists ((v_main_~x~0_14 (_ FloatingPoint 8 24))) (and (not (fp.eq c_main_~x~0 v_main_~x~0_14)) (= c_main_~x~0 (fp.div roundNearestTiesToEven v_main_~x~0_14 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))))) (fp.eq (fp.div roundNearestTiesToEven c_main_~x~0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0))) c_main_~x~0)) is different from true [2018-11-18 16:17:07,404 WARN L180 SmtUtils]: Spent 12.24 s on a formula simplification that was a NOOP. DAG size: 22 [2018-11-18 16:17:31,669 WARN L180 SmtUtils]: Spent 11.93 s on a formula simplification that was a NOOP. DAG size: 22 [2018-11-18 16:17:37,813 WARN L832 $PredicateComparison]: unable to prove that (exists ((v_prenex_2 (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven v_prenex_2 .cse1))) (and (not (fp.eq .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32)))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0) (not (fp.eq .cse0 v_prenex_2)))))) is different from false [2018-11-18 16:17:39,858 WARN L854 $PredicateComparison]: unable to prove that (exists ((v_prenex_2 (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven v_prenex_2 .cse1))) (and (not (fp.eq .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32)))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0) (not (fp.eq .cse0 v_prenex_2)))))) is different from true [2018-11-18 16:17:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-18 16:17:39,861 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 16:17:39,869 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:17:39,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-18 16:17:39,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 16:17:39,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 16:17:39,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=12, Unknown=12, NotChecked=18, Total=56 [2018-11-18 16:17:39,871 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 8 states. [2018-11-18 16:18:35,045 WARN L180 SmtUtils]: Spent 39.87 s on a formula simplification that was a NOOP. DAG size: 29 [2018-11-18 16:18:37,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:18:37,123 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-11-18 16:18:37,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 16:18:37,171 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2018-11-18 16:18:37,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:18:37,171 INFO L225 Difference]: With dead ends: 26 [2018-11-18 16:18:37,171 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 16:18:37,172 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 102.3s TimeCoverageRelationStatistics Valid=18, Invalid=20, Unknown=12, NotChecked=22, Total=72 [2018-11-18 16:18:37,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 16:18:37,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 16:18:37,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 16:18:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 16:18:37,172 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2018-11-18 16:18:37,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:18:37,173 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 16:18:37,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 16:18:37,173 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 16:18:37,173 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 16:18:37,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 16:19:13,900 WARN L180 SmtUtils]: Spent 36.68 s on a formula simplification that was a NOOP. DAG size: 26 [2018-11-18 16:19:14,028 WARN L180 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 1 [2018-11-18 16:19:19,794 WARN L180 SmtUtils]: Spent 5.77 s on a formula simplification that was a NOOP. DAG size: 15 [2018-11-18 16:19:19,795 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 16:19:19,795 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 16:19:19,795 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 16:19:19,796 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 16:19:19,796 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 16:19:19,796 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 16:19:19,796 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 7 20) the Hoare annotation is: true [2018-11-18 16:19:19,796 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 7 20) no Hoare annotation was computed. [2018-11-18 16:19:19,796 INFO L425 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2018-11-18 16:19:19,796 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 7 20) no Hoare annotation was computed. [2018-11-18 16:19:19,796 INFO L425 ceAbstractionStarter]: For program point L12-1(lines 12 16) no Hoare annotation was computed. [2018-11-18 16:19:19,796 INFO L421 ceAbstractionStarter]: At program point L12-3(lines 12 16) the Hoare annotation is: (and (exists ((v_main_~x~0_14 (_ FloatingPoint 8 24))) (and (not (fp.eq main_~x~0 v_main_~x~0_14)) (= main_~x~0 (fp.div roundNearestTiesToEven v_main_~x~0_14 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))))) (= main_~x1~0 (fp.div roundNearestTiesToEven main_~x~0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0))))) [2018-11-18 16:19:19,796 INFO L421 ceAbstractionStarter]: At program point L12-4(lines 12 16) the Hoare annotation is: (let ((.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))) (or (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv0 32)))) (and (fp.eq main_~x~0 .cse0) (let ((.cse1 (fp.div roundNearestTiesToEven main_~x1~0 .cse2))) (or (fp.eq .cse1 .cse0) (not (fp.eq (fp.div roundNearestTiesToEven .cse1 .cse2) .cse1)))))) (and (exists ((v_main_~x~0_14 (_ FloatingPoint 8 24))) (and (not (fp.eq main_~x~0 v_main_~x~0_14)) (= main_~x~0 (fp.div roundNearestTiesToEven v_main_~x~0_14 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 2.0)))))) (fp.eq (fp.div roundNearestTiesToEven main_~x~0 .cse2) main_~x~0)))) [2018-11-18 16:19:19,797 INFO L425 ceAbstractionStarter]: For program point L2-1(line 2) no Hoare annotation was computed. [2018-11-18 16:19:19,797 INFO L425 ceAbstractionStarter]: For program point L2-3(line 2) no Hoare annotation was computed. [2018-11-18 16:19:19,797 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2018-11-18 16:19:19,797 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2018-11-18 16:19:19,797 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2018-11-18 16:19:19,797 INFO L425 ceAbstractionStarter]: For program point L2(line 2) no Hoare annotation was computed. [2018-11-18 16:19:19,801 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_14,QUANTIFIED] [2018-11-18 16:19:19,803 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2018-11-18 16:19:19,803 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_14,QUANTIFIED] [2018-11-18 16:19:19,803 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2018-11-18 16:19:19,804 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2018-11-18 16:19:19,804 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2018-11-18 16:19:19,806 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_14,QUANTIFIED] [2018-11-18 16:19:19,806 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2018-11-18 16:19:19,806 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_14,QUANTIFIED] [2018-11-18 16:19:19,806 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2018-11-18 16:19:19,807 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2018-11-18 16:19:19,807 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2018-11-18 16:19:19,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 04:19:19 BoogieIcfgContainer [2018-11-18 16:19:19,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 16:19:19,808 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 16:19:19,808 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 16:19:19,809 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 16:19:19,809 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:14:23" (3/4) ... [2018-11-18 16:19:19,811 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 16:19:19,816 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 16:19:19,816 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 16:19:19,816 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-18 16:19:19,818 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2018-11-18 16:19:19,818 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 16:19:19,818 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 16:19:19,836 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (\exists v_main_~x~0_14 : C_FLOAT :: !~fp.eq~FLOAT(x, v_main_~x~0_14) && x == ~fp.div~FLOAT(~roundNearestTiesToEven, v_main_~x~0_14, ~to_fp~LONGDOUBLE(~roundNearestTiesToEven, 5/2))) && x1 == ~fp.div~FLOAT(~roundNearestTiesToEven, x, ~to_fp~LONGDOUBLE(~roundNearestTiesToEven, 5/2)) [2018-11-18 16:19:19,843 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_15c2fcc1-666e-4624-b2a7-da422d257bb6/bin-2019/uautomizer/witness.graphml [2018-11-18 16:19:19,843 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 16:19:19,844 INFO L168 Benchmark]: Toolchain (without parser) took 296927.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 951.9 MB in the beginning and 949.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 132.6 MB. Max. memory is 11.5 GB. [2018-11-18 16:19:19,844 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:19:19,845 INFO L168 Benchmark]: CACSL2BoogieTranslator took 154.50 ms. Allocated memory is still 1.0 GB. Free memory was 951.9 MB in the beginning and 941.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:19:19,845 INFO L168 Benchmark]: Boogie Preprocessor took 22.02 ms. Allocated memory is still 1.0 GB. Free memory was 941.1 MB in the beginning and 935.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 16:19:19,845 INFO L168 Benchmark]: RCFGBuilder took 406.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 935.8 MB in the beginning and 1.1 GB in the end (delta: -173.8 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. [2018-11-18 16:19:19,846 INFO L168 Benchmark]: TraceAbstraction took 296306.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 949.8 MB in the end (delta: 159.7 MB). Peak memory consumption was 159.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:19:19,846 INFO L168 Benchmark]: Witness Printer took 35.08 ms. Allocated memory is still 1.2 GB. Free memory is still 949.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:19:19,848 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 154.50 ms. Allocated memory is still 1.0 GB. Free memory was 951.9 MB in the beginning and 941.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.02 ms. Allocated memory is still 1.0 GB. Free memory was 941.1 MB in the beginning and 935.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 406.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 935.8 MB in the beginning and 1.1 GB in the end (delta: -173.8 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 296306.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 949.8 MB in the end (delta: 159.7 MB). Peak memory consumption was 159.7 MB. Max. memory is 11.5 GB. * Witness Printer took 35.08 ms. Allocated memory is still 1.2 GB. Free memory is still 949.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_14,QUANTIFIED] - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_14,QUANTIFIED] - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_14,QUANTIFIED] - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_14,QUANTIFIED] - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant [2018-11-18 16:19:19,852 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_14,QUANTIFIED] [2018-11-18 16:19:19,852 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2018-11-18 16:19:19,852 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_14,QUANTIFIED] [2018-11-18 16:19:19,853 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2018-11-18 16:19:19,853 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2018-11-18 16:19:19,853 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2018-11-18 16:19:19,853 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_14,QUANTIFIED] [2018-11-18 16:19:19,853 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2018-11-18 16:19:19,854 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_14,QUANTIFIED] [2018-11-18 16:19:19,854 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2018-11-18 16:19:19,854 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2018-11-18 16:19:19,854 WARN L387 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven Derived loop invariant: (\exists v_main_~x~0_14 : C_FLOAT :: !~fp.eq~FLOAT(x, v_main_~x~0_14) && x == ~fp.div~FLOAT(~roundNearestTiesToEven, v_main_~x~0_14, ~to_fp~LONGDOUBLE(~roundNearestTiesToEven, 5/2))) && x1 == ~fp.div~FLOAT(~roundNearestTiesToEven, x, ~to_fp~LONGDOUBLE(~roundNearestTiesToEven, 5/2)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. SAFE Result, 296.2s OverallTime, 5 OverallIterations, 8 TraceHistogramMax, 125.8s AutomataDifference, 0.0s DeadEndRemovalTime, 42.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 61 SDtfs, 5 SDslu, 126 SDs, 0 SdLazy, 68 SolverSat, 13 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 27.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 208.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 21 NumberOfFragments, 88 HoareAnnotationTreeSize, 12 FomulaSimplifications, 413 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 100 FormulaSimplificationTreeSizeReductionInter, 42.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 127.1s InterpolantComputationTime, 78 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 103 ConstructedInterpolants, 6 QuantifiedInterpolants, 17397 SizeOfPredicates, 13 NumberOfNonLiveVariables, 131 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 56/100 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...