./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/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 1d363a30f559764c47bcb73d637f2d7196a1b97b ........................................................................................................................................................................................................................................................................ 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_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/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 1d363a30f559764c47bcb73d637f2d7196a1b97b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 13:29:46,552 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 13:29:46,554 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 13:29:46,561 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 13:29:46,561 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 13:29:46,562 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 13:29:46,562 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 13:29:46,563 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 13:29:46,564 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 13:29:46,565 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 13:29:46,565 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 13:29:46,566 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 13:29:46,566 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 13:29:46,567 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 13:29:46,568 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 13:29:46,568 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 13:29:46,569 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 13:29:46,570 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 13:29:46,571 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 13:29:46,572 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 13:29:46,573 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 13:29:46,574 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 13:29:46,575 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 13:29:46,575 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 13:29:46,576 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 13:29:46,576 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 13:29:46,577 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 13:29:46,577 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 13:29:46,578 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 13:29:46,579 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 13:29:46,579 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 13:29:46,579 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 13:29:46,580 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 13:29:46,580 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 13:29:46,580 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 13:29:46,581 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 13:29:46,581 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 13:29:46,590 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 13:29:46,591 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 13:29:46,591 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 13:29:46,591 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 13:29:46,592 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 13:29:46,592 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 13:29:46,592 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 13:29:46,592 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 13:29:46,592 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 13:29:46,593 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 13:29:46,593 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 13:29:46,593 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 13:29:46,593 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 13:29:46,593 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 13:29:46,593 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 13:29:46,593 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 13:29:46,593 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 13:29:46,593 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 13:29:46,594 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 13:29:46,594 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 13:29:46,594 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 13:29:46,594 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 13:29:46,594 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 13:29:46,594 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 13:29:46,594 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 13:29:46,594 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 13:29:46,594 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 13:29:46,595 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 13:29:46,595 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 13:29:46,595 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_39ce4555-8301-4f39-aca2-e00ff3c3b07d/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 -> 1d363a30f559764c47bcb73d637f2d7196a1b97b [2018-11-10 13:29:46,616 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 13:29:46,624 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 13:29:46,626 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 13:29:46,627 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 13:29:46,627 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 13:29:46,627 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i [2018-11-10 13:29:46,662 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/data/754fc91fe/18b62450274b4270bcf15570fcf498bf/FLAGa4340479e [2018-11-10 13:29:47,071 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 13:29:47,071 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i [2018-11-10 13:29:47,075 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/data/754fc91fe/18b62450274b4270bcf15570fcf498bf/FLAGa4340479e [2018-11-10 13:29:47,085 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/data/754fc91fe/18b62450274b4270bcf15570fcf498bf [2018-11-10 13:29:47,088 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 13:29:47,089 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 13:29:47,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 13:29:47,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 13:29:47,093 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 13:29:47,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 01:29:47" (1/1) ... [2018-11-10 13:29:47,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63dabf2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:47, skipping insertion in model container [2018-11-10 13:29:47,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 01:29:47" (1/1) ... [2018-11-10 13:29:47,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 13:29:47,120 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 13:29:47,226 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 13:29:47,229 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 13:29:47,238 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 13:29:47,246 INFO L193 MainTranslator]: Completed translation [2018-11-10 13:29:47,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:47 WrapperNode [2018-11-10 13:29:47,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 13:29:47,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 13:29:47,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 13:29:47,247 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 13:29:47,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:47" (1/1) ... [2018-11-10 13:29:47,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:47" (1/1) ... [2018-11-10 13:29:47,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:47" (1/1) ... [2018-11-10 13:29:47,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:47" (1/1) ... [2018-11-10 13:29:47,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:47" (1/1) ... [2018-11-10 13:29:47,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:47" (1/1) ... [2018-11-10 13:29:47,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:47" (1/1) ... [2018-11-10 13:29:47,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 13:29:47,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 13:29:47,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 13:29:47,264 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 13:29:47,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/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 [2018-11-10 13:29:47,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 13:29:47,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 13:29:47,332 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 13:29:47,332 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 13:29:47,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 13:29:47,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 13:29:47,332 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 13:29:47,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 13:29:47,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 13:29:47,423 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 13:29:47,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 01:29:47 BoogieIcfgContainer [2018-11-10 13:29:47,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 13:29:47,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 13:29:47,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 13:29:47,426 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 13:29:47,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 01:29:47" (1/3) ... [2018-11-10 13:29:47,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aba5c22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 01:29:47, skipping insertion in model container [2018-11-10 13:29:47,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:47" (2/3) ... [2018-11-10 13:29:47,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aba5c22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 01:29:47, skipping insertion in model container [2018-11-10 13:29:47,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 01:29:47" (3/3) ... [2018-11-10 13:29:47,428 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_bad_false-unreach-call.i [2018-11-10 13:29:47,433 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 13:29:47,438 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 13:29:47,446 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 13:29:47,467 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 13:29:47,468 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 13:29:47,468 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 13:29:47,468 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 13:29:47,468 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 13:29:47,468 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 13:29:47,468 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 13:29:47,468 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 13:29:47,468 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 13:29:47,479 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-10 13:29:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 13:29:47,482 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:29:47,483 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:29:47,484 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:29:47,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:29:47,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-11-10 13:29:47,489 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 13:29:47,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 13:29:47,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:29:47,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:29:47,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:29:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:29:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:29:47,555 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 13:29:47,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 13:29:47,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 13:29:47,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 13:29:47,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 13:29:47,567 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-10 13:29:47,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:29:47,579 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-10 13:29:47,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 13:29:47,580 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-10 13:29:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:29:47,586 INFO L225 Difference]: With dead ends: 31 [2018-11-10 13:29:47,587 INFO L226 Difference]: Without dead ends: 12 [2018-11-10 13:29:47,589 INFO L605 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 [2018-11-10 13:29:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-10 13:29:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-10 13:29:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-10 13:29:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-10 13:29:47,613 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-10 13:29:47,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:29:47,613 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-10 13:29:47,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 13:29:47,614 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-10 13:29:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 13:29:47,614 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:29:47,614 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:29:47,614 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:29:47,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:29:47,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-11-10 13:29:47,615 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 13:29:47,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 13:29:47,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:29:47,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:29:47,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:29:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 13:29:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 13:29:47,641 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 13:29:47,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 01:29:47 BoogieIcfgContainer [2018-11-10 13:29:47,653 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 13:29:47,654 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 13:29:47,654 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 13:29:47,654 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 13:29:47,654 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 01:29:47" (3/4) ... [2018-11-10 13:29:47,656 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-10 13:29:47,656 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 13:29:47,657 INFO L168 Benchmark]: Toolchain (without parser) took 568.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -156.4 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 13:29:47,658 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 13:29:47,659 INFO L168 Benchmark]: CACSL2BoogieTranslator took 156.43 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 13:29:47,659 INFO L168 Benchmark]: Boogie Preprocessor took 17.39 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 13:29:47,659 INFO L168 Benchmark]: RCFGBuilder took 159.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -190.9 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2018-11-10 13:29:47,660 INFO L168 Benchmark]: TraceAbstraction took 229.70 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2018-11-10 13:29:47,660 INFO L168 Benchmark]: Witness Printer took 2.90 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-10 13:29:47,662 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 156.43 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.39 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 159.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -190.9 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 229.70 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * Witness Printer took 2.90 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: 3.4 MB). Peak memory consumption was 3.4 MB. 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 someBinaryDOUBLEComparisonOperation at line 12, overapproximation of someBinaryArithmeticDOUBLEoperation at line 10. Possible FailurePath: [L9] double x = 1.0; [L10] double x1 = x/1.6; 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 0.1.23-1dbac8b [2018-11-10 13:29:49,076 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 13:29:49,077 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 13:29:49,086 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 13:29:49,086 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 13:29:49,087 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 13:29:49,087 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 13:29:49,089 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 13:29:49,090 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 13:29:49,090 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 13:29:49,091 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 13:29:49,091 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 13:29:49,092 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 13:29:49,092 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 13:29:49,093 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 13:29:49,094 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 13:29:49,094 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 13:29:49,095 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 13:29:49,097 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 13:29:49,098 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 13:29:49,099 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 13:29:49,099 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 13:29:49,101 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 13:29:49,101 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 13:29:49,101 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 13:29:49,102 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 13:29:49,103 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 13:29:49,103 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 13:29:49,104 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 13:29:49,104 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 13:29:49,105 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 13:29:49,105 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 13:29:49,105 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 13:29:49,105 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 13:29:49,106 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 13:29:49,106 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 13:29:49,107 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-11-10 13:29:49,116 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 13:29:49,117 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 13:29:49,117 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 13:29:49,117 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 13:29:49,118 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 13:29:49,118 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 13:29:49,118 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 13:29:49,118 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 13:29:49,119 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 13:29:49,119 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 13:29:49,119 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 13:29:49,119 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 13:29:49,119 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 13:29:49,119 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 13:29:49,120 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-10 13:29:49,120 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-10 13:29:49,120 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 13:29:49,120 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 13:29:49,120 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 13:29:49,120 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 13:29:49,120 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 13:29:49,121 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 13:29:49,121 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 13:29:49,121 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 13:29:49,121 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 13:29:49,121 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 13:29:49,121 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 13:29:49,121 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-11-10 13:29:49,122 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 13:29:49,124 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-10 13:29:49,124 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-10 13:29:49,124 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_39ce4555-8301-4f39-aca2-e00ff3c3b07d/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 -> 1d363a30f559764c47bcb73d637f2d7196a1b97b [2018-11-10 13:29:49,156 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 13:29:49,165 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 13:29:49,167 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 13:29:49,168 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 13:29:49,169 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 13:29:49,169 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i [2018-11-10 13:29:49,213 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/data/9f113a111/ec69e06a5fa647b88d59fe1bc8dfa75e/FLAG3a06f03f7 [2018-11-10 13:29:49,510 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 13:29:49,511 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i [2018-11-10 13:29:49,514 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/data/9f113a111/ec69e06a5fa647b88d59fe1bc8dfa75e/FLAG3a06f03f7 [2018-11-10 13:29:49,523 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/data/9f113a111/ec69e06a5fa647b88d59fe1bc8dfa75e [2018-11-10 13:29:49,525 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 13:29:49,526 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 13:29:49,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 13:29:49,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 13:29:49,530 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 13:29:49,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 01:29:49" (1/1) ... [2018-11-10 13:29:49,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@629197e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:49, skipping insertion in model container [2018-11-10 13:29:49,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 01:29:49" (1/1) ... [2018-11-10 13:29:49,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 13:29:49,549 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 13:29:49,654 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 13:29:49,659 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 13:29:49,670 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 13:29:49,682 INFO L193 MainTranslator]: Completed translation [2018-11-10 13:29:49,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:49 WrapperNode [2018-11-10 13:29:49,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 13:29:49,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 13:29:49,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 13:29:49,683 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 13:29:49,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:49" (1/1) ... [2018-11-10 13:29:49,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:49" (1/1) ... [2018-11-10 13:29:49,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:49" (1/1) ... [2018-11-10 13:29:49,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:49" (1/1) ... [2018-11-10 13:29:49,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:49" (1/1) ... [2018-11-10 13:29:49,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:49" (1/1) ... [2018-11-10 13:29:49,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:49" (1/1) ... [2018-11-10 13:29:49,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 13:29:49,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 13:29:49,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 13:29:49,705 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 13:29:49,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/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 [2018-11-10 13:29:49,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 13:29:49,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 13:29:49,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 13:29:49,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 13:29:49,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 13:29:49,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 13:29:49,740 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 13:29:49,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 13:29:49,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 13:29:50,595 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 13:29:50,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 01:29:50 BoogieIcfgContainer [2018-11-10 13:29:50,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 13:29:50,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 13:29:50,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 13:29:50,598 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 13:29:50,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 01:29:49" (1/3) ... [2018-11-10 13:29:50,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ab9e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 01:29:50, skipping insertion in model container [2018-11-10 13:29:50,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:29:49" (2/3) ... [2018-11-10 13:29:50,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ab9e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 01:29:50, skipping insertion in model container [2018-11-10 13:29:50,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 01:29:50" (3/3) ... [2018-11-10 13:29:50,600 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_bad_false-unreach-call.i [2018-11-10 13:29:50,608 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 13:29:50,613 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 13:29:50,626 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 13:29:50,649 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 13:29:50,649 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 13:29:50,649 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 13:29:50,650 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 13:29:50,650 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 13:29:50,650 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 13:29:50,650 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 13:29:50,650 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 13:29:50,650 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 13:29:50,662 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-10 13:29:50,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 13:29:50,665 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:29:50,666 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:29:50,668 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:29:50,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:29:50,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-11-10 13:29:50,675 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 13:29:50,676 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/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 [2018-11-10 13:29:50,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:29:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:29:50,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:29:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:29:50,931 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 13:29:50,942 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 13:29:50,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 13:29:50,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 13:29:50,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 13:29:50,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 13:29:50,953 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-10 13:29:50,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:29:50,968 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-10 13:29:50,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 13:29:50,969 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-10 13:29:50,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:29:50,975 INFO L225 Difference]: With dead ends: 31 [2018-11-10 13:29:50,975 INFO L226 Difference]: Without dead ends: 12 [2018-11-10 13:29:50,977 INFO L605 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 [2018-11-10 13:29:50,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-10 13:29:50,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-10 13:29:50,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-10 13:29:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-10 13:29:50,999 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-10 13:29:50,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:29:50,999 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-10 13:29:50,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 13:29:51,000 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-10 13:29:51,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 13:29:51,000 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:29:51,000 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:29:51,000 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:29:51,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:29:51,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-11-10 13:29:51,001 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 13:29:51,001 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/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 [2018-11-10 13:29:51,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:29:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:29:51,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:29:52,479 WARN L179 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 11 [2018-11-10 13:29:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:29:52,485 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 13:29:52,494 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 13:29:52,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 13:29:52,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 13:29:52,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 13:29:52,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 13:29:52,496 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-11-10 13:29:54,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:29:54,405 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-10 13:29:55,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 13:29:55,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-10 13:29:55,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:29:55,024 INFO L225 Difference]: With dead ends: 19 [2018-11-10 13:29:55,025 INFO L226 Difference]: Without dead ends: 14 [2018-11-10 13:29:55,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 13:29:55,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-10 13:29:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-10 13:29:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-10 13:29:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-10 13:29:55,028 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-11-10 13:29:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:29:55,028 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-10 13:29:55,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 13:29:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-10 13:29:55,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 13:29:55,028 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:29:55,028 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:29:55,029 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:29:55,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:29:55,029 INFO L82 PathProgramCache]: Analyzing trace with hash -661808769, now seen corresponding path program 1 times [2018-11-10 13:29:55,029 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 13:29:55,029 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/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 [2018-11-10 13:29:55,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:29:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:29:55,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:29:59,497 WARN L179 SmtUtils]: Spent 2.40 s on a formula simplification that was a NOOP. DAG size: 12 [2018-11-10 13:29:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:29:59,501 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:30:12,623 WARN L179 SmtUtils]: Spent 2.74 s on a formula simplification that was a NOOP. DAG size: 7 [2018-11-10 13:30:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:30:12,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 13:30:12,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-11-10 13:30:12,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 13:30:12,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 13:30:12,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-10 13:30:12,647 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-11-10 13:30:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:30:22,667 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-11-10 13:30:22,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 13:30:22,667 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-11-10 13:30:22,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:30:22,668 INFO L225 Difference]: With dead ends: 23 [2018-11-10 13:30:22,668 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 13:30:22,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-10 13:30:22,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 13:30:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 13:30:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 13:30:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-10 13:30:22,672 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 13 [2018-11-10 13:30:22,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:30:22,673 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-10 13:30:22,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 13:30:22,673 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-10 13:30:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-10 13:30:22,673 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:30:22,673 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:30:22,674 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:30:22,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:30:22,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2058417419, now seen corresponding path program 2 times [2018-11-10 13:30:22,674 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 13:30:22,674 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/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 [2018-11-10 13:30:22,677 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 13:30:23,516 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 13:30:23,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 13:30:23,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:30:32,955 WARN L179 SmtUtils]: Spent 3.47 s on a formula simplification that was a NOOP. DAG size: 14 [2018-11-10 13:30:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:30:32,959 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:30:42,380 WARN L832 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) c_main_~x1~0))) is different from false [2018-11-10 13:30:46,689 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from false [2018-11-10 13:30:49,091 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from true [2018-11-10 13:30:51,687 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))) is different from false [2018-11-10 13:30:54,281 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))) is different from true [2018-11-10 13:30:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2018-11-10 13:30:54,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 13:30:54,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2018-11-10 13:30:54,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 13:30:54,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 13:30:54,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=70, Unknown=7, NotChecked=54, Total=156 [2018-11-10 13:30:54,317 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 13 states. [2018-11-10 13:30:56,922 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) (.cse2 ((_ to_fp 11 53) RNE (_ bv0 32)))) (and (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2))) (= c_main_~x1~0 (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1)) (or (fp.eq c_main_~x~0 .cse2) (not (fp.eq c_main_~x1~0 c_main_~x~0))))) is different from true [2018-11-10 13:30:59,340 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0)) (let ((.cse1 (fp.div RNE c_main_~x1~0 .cse0))) (or (fp.eq .cse1 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse1 .cse0) .cse1)))))) is different from true [2018-11-10 13:31:13,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:31:13,842 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-11-10 13:31:13,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 13:31:13,842 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2018-11-10 13:31:13,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:31:13,843 INFO L225 Difference]: With dead ends: 30 [2018-11-10 13:31:13,843 INFO L226 Difference]: Without dead ends: 22 [2018-11-10 13:31:13,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=33, Invalid=88, Unknown=9, NotChecked=110, Total=240 [2018-11-10 13:31:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-10 13:31:13,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-10 13:31:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-10 13:31:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-11-10 13:31:13,847 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 17 [2018-11-10 13:31:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:31:13,848 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-11-10 13:31:13,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 13:31:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-11-10 13:31:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-10 13:31:13,849 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:31:13,849 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:31:13,849 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:31:13,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:31:13,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1566812823, now seen corresponding path program 3 times [2018-11-10 13:31:13,849 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 13:31:13,849 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/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 [2018-11-10 13:31:13,853 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-10 13:31:15,345 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-10 13:31:15,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 13:31:15,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:31:17,671 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE c_main_~x~0 .cse0)) (= c_main_~x~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0) .cse0) .cse0) .cse0)))) is different from true [2018-11-10 13:31:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2018-11-10 13:31:17,675 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:31:52,568 WARN L179 SmtUtils]: Spent 11.05 s on a formula simplification that was a NOOP. DAG size: 11 [2018-11-10 13:31:54,981 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from false [2018-11-10 13:31:57,394 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from true [2018-11-10 13:32:00,012 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))) is different from false [2018-11-10 13:32:02,626 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))) is different from true [2018-11-10 13:32:05,404 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))) is different from false [2018-11-10 13:32:08,208 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))) is different from true [2018-11-10 13:32:11,185 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))) is different from false [2018-11-10 13:32:14,161 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))) is different from true [2018-11-10 13:32:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 28 not checked. [2018-11-10 13:32:14,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 13:32:14,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2018-11-10 13:32:14,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 13:32:14,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 13:32:14,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=105, Unknown=10, NotChecked=120, Total=272 [2018-11-10 13:32:14,202 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 17 states. [2018-11-10 13:32:17,266 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (_ bv0 32))) (.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0)) (or (fp.eq c_main_~x~0 .cse1) (not (fp.eq c_main_~x1~0 c_main_~x~0))) (let ((.cse2 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse0) .cse0) .cse0) .cse0))) (or (not (fp.eq (fp.div RNE .cse2 .cse0) .cse2)) (fp.eq .cse2 .cse1))))) is different from true [2018-11-10 13:32:20,128 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (_ bv0 32))) (.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0)) (or (fp.eq c_main_~x~0 .cse1) (not (fp.eq c_main_~x1~0 c_main_~x~0))) (let ((.cse2 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse0) .cse0) .cse0))) (or (not (fp.eq (fp.div RNE .cse2 .cse0) .cse2)) (fp.eq .cse2 .cse1))))) is different from true [2018-11-10 13:32:22,746 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1) .cse1)))) is different from true [2018-11-10 13:32:25,168 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1) .cse1) .cse1)))) is different from true [2018-11-10 13:32:40,206 WARN L179 SmtUtils]: Spent 9.12 s on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2018-11-10 13:32:42,418 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (or (fp.eq c_main_~x1~0 .cse0) (not (fp.eq (fp.div RNE c_main_~x1~0 .cse1) c_main_~x1~0))) (= c_main_~x1~0 (fp.div RNE c_main_~x~0 .cse1)) (or (fp.eq c_main_~x~0 .cse0) (not (fp.eq c_main_~x1~0 c_main_~x~0))) (= c_main_~x~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1) .cse1) .cse1) .cse1)))) is different from true [2018-11-10 13:32:45,115 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))) (and (or (fp.eq c_main_~x1~0 .cse0) (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) c_main_~x1~0))) (fp.eq c_main_~x~0 .cse0))) is different from false [2018-11-10 13:32:47,327 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))) (and (or (fp.eq c_main_~x1~0 .cse0) (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) c_main_~x1~0))) (fp.eq c_main_~x~0 .cse0))) is different from true [2018-11-10 13:32:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:32:56,876 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-10 13:32:56,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 13:32:56,876 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2018-11-10 13:32:56,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:32:56,877 INFO L225 Difference]: With dead ends: 34 [2018-11-10 13:32:56,877 INFO L226 Difference]: Without dead ends: 26 [2018-11-10 13:32:56,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.5s TimeCoverageRelationStatistics Valid=57, Invalid=151, Unknown=18, NotChecked=374, Total=600 [2018-11-10 13:32:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-10 13:32:56,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-10 13:32:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-10 13:32:56,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-11-10 13:32:56,881 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 21 [2018-11-10 13:32:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:32:56,882 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-11-10 13:32:56,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 13:32:56,882 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-11-10 13:32:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 13:32:56,883 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:32:56,883 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:32:56,883 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:32:56,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:32:56,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1788298717, now seen corresponding path program 4 times [2018-11-10 13:32:56,884 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 13:32:56,884 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-11-10 13:32:56,887 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 13:32:58,623 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 13:32:58,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 13:32:58,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:33:17,448 WARN L179 SmtUtils]: Spent 3.28 s on a formula simplification that was a NOOP. DAG size: 18 [2018-11-10 13:33:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:33:17,453 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:33:21,497 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) c_main_~x1~0)) is different from false [2018-11-10 13:33:24,486 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 13:33:26,916 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 13:33:29,533 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 13:33:32,148 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 13:33:34,975 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 13:33:37,811 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 13:33:40,892 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 13:33:43,990 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 13:33:47,269 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 13:33:50,529 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 13:33:54,013 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 13:33:57,620 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 13:33:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 56 not checked. [2018-11-10 13:33:57,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 13:33:57,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-11-10 13:33:57,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 13:33:57,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 13:33:57,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=86, Unknown=18, NotChecked=168, Total=306 [2018-11-10 13:33:57,676 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2018-11-10 13:34:01,262 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (not (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))) (= c_main_~x1~0 (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1)) (not (fp.eq c_main_~x1~0 c_main_~x~0)))) is different from true [2018-11-10 13:34:04,547 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0)) (not (let ((.cse1 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse0) .cse0) .cse0) .cse0) .cse0))) (fp.eq (fp.div RNE .cse1 .cse0) .cse1))))) is different from true [2018-11-10 13:34:07,618 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (not (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1) .cse1)))) is different from true [2018-11-10 13:34:10,479 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (not (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1) .cse1) .cse1)))) is different from true [2018-11-10 13:34:13,136 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (not (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1) .cse1) .cse1) .cse1)))) is different from true [2018-11-10 13:34:15,556 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0)) (not (let ((.cse1 (fp.div RNE c_main_~x1~0 .cse0))) (fp.eq (fp.div RNE .cse1 .cse0) .cse1))))) is different from true [2018-11-10 13:34:22,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:34:22,119 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-11-10 13:34:22,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 13:34:22,334 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2018-11-10 13:34:22,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:34:22,335 INFO L225 Difference]: With dead ends: 33 [2018-11-10 13:34:22,335 INFO L226 Difference]: Without dead ends: 28 [2018-11-10 13:34:22,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.4s TimeCoverageRelationStatistics Valid=46, Invalid=92, Unknown=24, NotChecked=390, Total=552 [2018-11-10 13:34:22,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-10 13:34:22,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-10 13:34:22,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-10 13:34:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-11-10 13:34:22,341 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-11-10 13:34:22,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:34:22,341 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-11-10 13:34:22,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 13:34:22,341 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-11-10 13:34:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 13:34:22,342 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:34:22,342 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:34:22,342 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:34:22,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:34:22,342 INFO L82 PathProgramCache]: Analyzing trace with hash 397284265, now seen corresponding path program 5 times [2018-11-10 13:34:22,343 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 13:34:22,343 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_39ce4555-8301-4f39-aca2-e00ff3c3b07d/bin-2019/uautomizer/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2018-11-10 13:34:22,346 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-11-10 13:34:26,022 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-10 13:34:26,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 13:34:26,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:34:32,733 WARN L179 SmtUtils]: Spent 4.25 s on a formula simplification that was a NOOP. DAG size: 19 [2018-11-10 13:34:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:34:32,737 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:35:00,684 WARN L179 SmtUtils]: Spent 2.84 s on a formula simplification that was a NOOP. DAG size: 7 [2018-11-10 13:35:03,125 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 13:35:05,550 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 13:35:08,187 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 13:35:10,840 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 13:35:12,218 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2018-11-10 13:35:12,419 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2018-11-10 13:35:12,419 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:141) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:823) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:767) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:339) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:418) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:435) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 40 more [2018-11-10 13:35:12,421 INFO L168 Benchmark]: Toolchain (without parser) took 322895.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 947.9 MB in the beginning and 909.4 MB in the end (delta: 38.4 MB). Peak memory consumption was 189.4 MB. Max. memory is 11.5 GB. [2018-11-10 13:35:12,422 INFO L168 Benchmark]: CDTParser took 0.14 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. [2018-11-10 13:35:12,422 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.55 ms. Allocated memory is still 1.0 GB. Free memory was 947.9 MB in the beginning and 937.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 13:35:12,423 INFO L168 Benchmark]: Boogie Preprocessor took 21.39 ms. Allocated memory is still 1.0 GB. Free memory is still 937.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 13:35:12,423 INFO L168 Benchmark]: RCFGBuilder took 891.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -194.2 MB). Peak memory consumption was 27.4 MB. Max. memory is 11.5 GB. [2018-11-10 13:35:12,423 INFO L168 Benchmark]: TraceAbstraction took 321825.18 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 909.4 MB in the end (delta: 221.9 MB). Peak memory consumption was 221.9 MB. Max. memory is 11.5 GB. [2018-11-10 13:35:12,425 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 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 155.55 ms. Allocated memory is still 1.0 GB. Free memory was 947.9 MB in the beginning and 937.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.39 ms. Allocated memory is still 1.0 GB. Free memory is still 937.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 891.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -194.2 MB). Peak memory consumption was 27.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 321825.18 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 909.4 MB in the end (delta: 221.9 MB). Peak memory consumption was 221.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...