./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Float_div_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Float_div_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c9c4c4712c0b03f250e94d62f797a284bfa7b46f ............................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Float_div_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c9c4c4712c0b03f250e94d62f797a284bfa7b46f ........................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 07:55:04,796 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 07:55:04,797 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 07:55:04,804 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 07:55:04,804 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 07:55:04,805 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 07:55:04,805 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 07:55:04,806 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 07:55:04,807 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 07:55:04,808 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 07:55:04,808 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 07:55:04,809 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 07:55:04,809 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 07:55:04,810 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 07:55:04,810 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 07:55:04,811 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 07:55:04,811 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 07:55:04,812 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 07:55:04,813 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 07:55:04,814 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 07:55:04,815 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 07:55:04,815 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 07:55:04,816 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 07:55:04,816 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 07:55:04,817 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 07:55:04,817 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 07:55:04,818 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 07:55:04,819 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 07:55:04,819 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 07:55:04,820 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 07:55:04,820 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 07:55:04,820 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 07:55:04,821 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 07:55:04,821 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 07:55:04,821 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 07:55:04,822 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 07:55:04,822 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 07:55:04,832 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 07:55:04,832 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 07:55:04,832 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 07:55:04,833 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 07:55:04,833 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 07:55:04,833 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 07:55:04,833 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 07:55:04,834 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 07:55:04,834 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 07:55:04,834 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 07:55:04,834 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 07:55:04,834 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 07:55:04,834 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 07:55:04,834 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 07:55:04,834 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 07:55:04,835 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 07:55:04,835 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 07:55:04,835 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 07:55:04,835 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 07:55:04,835 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 07:55:04,835 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 07:55:04,835 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 07:55:04,836 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 07:55:04,836 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 07:55:04,836 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 07:55:04,836 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 07:55:04,836 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 07:55:04,836 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 07:55:04,836 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 07:55:04,836 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_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9c4c4712c0b03f250e94d62f797a284bfa7b46f [2018-11-10 07:55:04,860 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 07:55:04,869 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 07:55:04,872 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 07:55:04,873 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 07:55:04,873 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 07:55:04,874 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/../../sv-benchmarks/c/floats-esbmc-regression/Float_div_true-unreach-call.i [2018-11-10 07:55:04,915 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/data/2557ad2a3/29fdeff1e0f0422e993104a9491052f1/FLAG4a7ca161f [2018-11-10 07:55:05,245 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 07:55:05,246 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/sv-benchmarks/c/floats-esbmc-regression/Float_div_true-unreach-call.i [2018-11-10 07:55:05,250 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/data/2557ad2a3/29fdeff1e0f0422e993104a9491052f1/FLAG4a7ca161f [2018-11-10 07:55:05,261 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/data/2557ad2a3/29fdeff1e0f0422e993104a9491052f1 [2018-11-10 07:55:05,263 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 07:55:05,265 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 07:55:05,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 07:55:05,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 07:55:05,268 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 07:55:05,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:55:05" (1/1) ... [2018-11-10 07:55:05,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10835ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:05, skipping insertion in model container [2018-11-10 07:55:05,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:55:05" (1/1) ... [2018-11-10 07:55:05,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 07:55:05,295 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 07:55:05,418 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:55:05,422 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 07:55:05,433 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:55:05,441 INFO L193 MainTranslator]: Completed translation [2018-11-10 07:55:05,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:05 WrapperNode [2018-11-10 07:55:05,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 07:55:05,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 07:55:05,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 07:55:05,442 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 07:55:05,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:05" (1/1) ... [2018-11-10 07:55:05,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:05" (1/1) ... [2018-11-10 07:55:05,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:05" (1/1) ... [2018-11-10 07:55:05,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:05" (1/1) ... [2018-11-10 07:55:05,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:05" (1/1) ... [2018-11-10 07:55:05,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:05" (1/1) ... [2018-11-10 07:55:05,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:05" (1/1) ... [2018-11-10 07:55:05,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 07:55:05,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 07:55:05,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 07:55:05,462 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 07:55:05,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/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 07:55:05,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 07:55:05,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 07:55:05,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 07:55:05,529 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 07:55:05,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 07:55:05,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 07:55:05,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 07:55:05,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 07:55:05,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 07:55:05,615 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 07:55:05,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:55:05 BoogieIcfgContainer [2018-11-10 07:55:05,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 07:55:05,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 07:55:05,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 07:55:05,618 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 07:55:05,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 07:55:05" (1/3) ... [2018-11-10 07:55:05,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ffe832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 07:55:05, skipping insertion in model container [2018-11-10 07:55:05,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:05" (2/3) ... [2018-11-10 07:55:05,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ffe832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 07:55:05, skipping insertion in model container [2018-11-10 07:55:05,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:55:05" (3/3) ... [2018-11-10 07:55:05,621 INFO L112 eAbstractionObserver]: Analyzing ICFG Float_div_true-unreach-call.i [2018-11-10 07:55:05,627 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 07:55:05,631 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 07:55:05,639 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 07:55:05,656 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 07:55:05,656 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 07:55:05,656 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 07:55:05,656 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 07:55:05,656 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 07:55:05,656 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 07:55:05,657 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 07:55:05,657 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 07:55:05,657 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 07:55:05,666 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-10 07:55:05,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 07:55:05,669 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:55:05,669 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:55:05,671 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:55:05,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:55:05,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-11-10 07:55:05,675 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:55:05,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:55:05,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:55:05,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:55:05,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:55:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:55:05,749 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 07:55:05,751 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:55:05,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 07:55:05,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 07:55:05,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 07:55:05,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 07:55:05,763 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-10 07:55:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:55:05,775 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-10 07:55:05,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 07:55:05,776 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-10 07:55:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:55:05,783 INFO L225 Difference]: With dead ends: 31 [2018-11-10 07:55:05,783 INFO L226 Difference]: Without dead ends: 12 [2018-11-10 07:55:05,786 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 07:55:05,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-10 07:55:05,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-10 07:55:05,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-10 07:55:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-10 07:55:05,809 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-10 07:55:05,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:55:05,809 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-10 07:55:05,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 07:55:05,809 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-10 07:55:05,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 07:55:05,809 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:55:05,810 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:55:05,810 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:55:05,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:55:05,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-11-10 07:55:05,810 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:55:05,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:55:05,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:55:05,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:55:05,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:55:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 07:55:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 07:55:05,833 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 07:55:05,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 07:55:05 BoogieIcfgContainer [2018-11-10 07:55:05,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 07:55:05,847 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 07:55:05,847 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 07:55:05,848 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 07:55:05,848 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:55:05" (3/4) ... [2018-11-10 07:55:05,850 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-10 07:55:05,850 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 07:55:05,851 INFO L168 Benchmark]: Toolchain (without parser) took 586.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -125.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 07:55:05,852 INFO L168 Benchmark]: CDTParser took 0.14 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 07:55:05,852 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.11 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 07:55:05,852 INFO L168 Benchmark]: Boogie Preprocessor took 19.55 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 07:55:05,853 INFO L168 Benchmark]: RCFGBuilder took 154.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -160.4 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2018-11-10 07:55:05,853 INFO L168 Benchmark]: TraceAbstraction took 230.84 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2018-11-10 07:55:05,854 INFO L168 Benchmark]: Witness Printer took 2.89 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 07:55:05,855 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 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 176.11 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 19.55 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 154.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -160.4 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 230.84 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * Witness Printer took 2.89 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 2]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 12, overapproximation of someBinaryArithmeticFLOAToperation at line 10. Possible FailurePath: [L9] float x = 1.0f; [L10] float x1 = x/2.5f; VAL [x=1] [L12] COND FALSE !(x1 != x) VAL [x=1] [L18] CALL __VERIFIER_assert(x == 0) VAL [\old(cond)=0] [L2] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L2] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 0.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-1dbac8b [2018-11-10 07:55:07,257 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 07:55:07,258 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 07:55:07,267 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 07:55:07,267 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 07:55:07,268 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 07:55:07,268 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 07:55:07,269 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 07:55:07,270 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 07:55:07,271 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 07:55:07,271 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 07:55:07,272 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 07:55:07,272 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 07:55:07,273 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 07:55:07,274 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 07:55:07,274 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 07:55:07,275 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 07:55:07,276 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 07:55:07,277 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 07:55:07,278 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 07:55:07,278 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 07:55:07,279 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 07:55:07,281 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 07:55:07,281 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 07:55:07,281 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 07:55:07,282 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 07:55:07,282 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 07:55:07,283 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 07:55:07,283 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 07:55:07,284 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 07:55:07,284 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 07:55:07,285 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 07:55:07,285 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 07:55:07,285 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 07:55:07,286 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 07:55:07,286 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 07:55:07,286 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-11-10 07:55:07,296 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 07:55:07,296 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 07:55:07,297 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 07:55:07,297 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 07:55:07,297 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 07:55:07,298 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 07:55:07,298 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 07:55:07,298 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 07:55:07,298 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 07:55:07,298 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 07:55:07,298 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 07:55:07,298 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 07:55:07,298 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 07:55:07,298 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 07:55:07,299 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-10 07:55:07,299 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-10 07:55:07,299 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 07:55:07,299 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 07:55:07,299 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 07:55:07,299 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 07:55:07,299 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 07:55:07,299 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 07:55:07,300 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 07:55:07,300 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 07:55:07,300 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 07:55:07,300 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 07:55:07,300 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 07:55:07,300 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-11-10 07:55:07,300 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 07:55:07,300 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-10 07:55:07,301 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-10 07:55:07,301 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_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9c4c4712c0b03f250e94d62f797a284bfa7b46f [2018-11-10 07:55:07,332 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 07:55:07,340 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 07:55:07,343 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 07:55:07,344 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 07:55:07,344 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 07:55:07,345 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/../../sv-benchmarks/c/floats-esbmc-regression/Float_div_true-unreach-call.i [2018-11-10 07:55:07,386 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/data/8738db554/11f576d507d74393ad604832c27e847c/FLAGe4964c470 [2018-11-10 07:55:07,708 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 07:55:07,708 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/sv-benchmarks/c/floats-esbmc-regression/Float_div_true-unreach-call.i [2018-11-10 07:55:07,711 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/data/8738db554/11f576d507d74393ad604832c27e847c/FLAGe4964c470 [2018-11-10 07:55:07,719 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/bin-2019/uautomizer/data/8738db554/11f576d507d74393ad604832c27e847c [2018-11-10 07:55:07,721 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 07:55:07,722 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 07:55:07,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 07:55:07,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 07:55:07,726 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 07:55:07,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:55:07" (1/1) ... [2018-11-10 07:55:07,729 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 07:55:07, skipping insertion in model container [2018-11-10 07:55:07,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:55:07" (1/1) ... [2018-11-10 07:55:07,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 07:55:07,745 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 07:55:07,860 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:55:07,866 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 07:55:07,878 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:55:07,888 INFO L193 MainTranslator]: Completed translation [2018-11-10 07:55:07,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:07 WrapperNode [2018-11-10 07:55:07,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 07:55:07,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 07:55:07,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 07:55:07,889 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 07:55:07,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:07" (1/1) ... [2018-11-10 07:55:07,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:07" (1/1) ... [2018-11-10 07:55:07,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:07" (1/1) ... [2018-11-10 07:55:07,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:07" (1/1) ... [2018-11-10 07:55:07,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:07" (1/1) ... [2018-11-10 07:55:07,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:07" (1/1) ... [2018-11-10 07:55:07,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:07" (1/1) ... [2018-11-10 07:55:07,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 07:55:07,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 07:55:07,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 07:55:07,910 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 07:55:07,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/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 07:55:07,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 07:55:07,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 07:55:07,946 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 07:55:07,946 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 07:55:07,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 07:55:07,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 07:55:07,946 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 07:55:07,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 07:55:07,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 07:55:08,334 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 07:55:08,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:55:08 BoogieIcfgContainer [2018-11-10 07:55:08,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 07:55:08,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 07:55:08,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 07:55:08,337 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 07:55:08,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 07:55:07" (1/3) ... [2018-11-10 07:55:08,338 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 07:55:08, skipping insertion in model container [2018-11-10 07:55:08,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:55:07" (2/3) ... [2018-11-10 07:55:08,338 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 07:55:08, skipping insertion in model container [2018-11-10 07:55:08,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:55:08" (3/3) ... [2018-11-10 07:55:08,339 INFO L112 eAbstractionObserver]: Analyzing ICFG Float_div_true-unreach-call.i [2018-11-10 07:55:08,345 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 07:55:08,350 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 07:55:08,359 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 07:55:08,377 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 07:55:08,377 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 07:55:08,378 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 07:55:08,378 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 07:55:08,378 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 07:55:08,378 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 07:55:08,378 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 07:55:08,378 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 07:55:08,378 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 07:55:08,391 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-10 07:55:08,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 07:55:08,394 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:55:08,395 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:55:08,396 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:55:08,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:55:08,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-11-10 07:55:08,402 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 07:55:08,402 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/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 07:55:08,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:55:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:55:08,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:55:08,480 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 07:55:08,480 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 07:55:08,488 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:55:08,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 07:55:08,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 07:55:08,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 07:55:08,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 07:55:08,500 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-10 07:55:08,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:55:08,515 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-10 07:55:08,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 07:55:08,516 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-10 07:55:08,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:55:08,522 INFO L225 Difference]: With dead ends: 31 [2018-11-10 07:55:08,522 INFO L226 Difference]: Without dead ends: 12 [2018-11-10 07:55:08,524 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 07:55:08,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-10 07:55:08,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-10 07:55:08,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-10 07:55:08,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-10 07:55:08,546 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-10 07:55:08,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:55:08,546 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-10 07:55:08,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 07:55:08,546 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-10 07:55:08,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 07:55:08,547 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:55:08,547 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:55:08,547 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:55:08,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:55:08,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-11-10 07:55:08,548 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 07:55:08,548 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/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 07:55:08,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:55:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:55:08,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:55:08,784 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-10 07:55:08,791 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 07:55:08,791 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 07:55:08,800 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:55:08,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 07:55:08,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 07:55:08,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 07:55:08,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 07:55:08,802 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-11-10 07:55:09,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:55:09,047 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-10 07:55:09,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 07:55:09,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-10 07:55:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:55:09,119 INFO L225 Difference]: With dead ends: 19 [2018-11-10 07:55:09,119 INFO L226 Difference]: Without dead ends: 14 [2018-11-10 07:55:09,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 07:55:09,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-10 07:55:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-10 07:55:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-10 07:55:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-10 07:55:09,122 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-11-10 07:55:09,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:55:09,122 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-10 07:55:09,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 07:55:09,122 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-10 07:55:09,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 07:55:09,123 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:55:09,123 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:55:09,123 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:55:09,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:55:09,123 INFO L82 PathProgramCache]: Analyzing trace with hash -661808769, now seen corresponding path program 1 times [2018-11-10 07:55:09,123 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 07:55:09,123 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/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 07:55:09,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:55:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:55:09,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:55:09,617 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-10 07:55:09,620 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 07:55:09,620 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 07:55:11,260 WARN L179 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-11-10 07:55:11,268 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 07:55:11,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:55:11,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-11-10 07:55:11,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 07:55:11,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 07:55:11,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-10 07:55:11,278 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-11-10 07:55:15,413 WARN L179 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 11 [2018-11-10 07:55:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:55:20,593 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-11-10 07:55:20,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 07:55:20,639 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-11-10 07:55:20,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:55:20,639 INFO L225 Difference]: With dead ends: 25 [2018-11-10 07:55:20,640 INFO L226 Difference]: Without dead ends: 20 [2018-11-10 07:55:20,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-11-10 07:55:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-10 07:55:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-10 07:55:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-10 07:55:20,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-10 07:55:20,645 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2018-11-10 07:55:20,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:55:20,645 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-10 07:55:20,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 07:55:20,645 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-10 07:55:20,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 07:55:20,646 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:55:20,646 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:55:20,646 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:55:20,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:55:20,646 INFO L82 PathProgramCache]: Analyzing trace with hash -875350895, now seen corresponding path program 2 times [2018-11-10 07:55:20,647 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 07:55:20,647 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/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 07:55:20,650 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 07:55:20,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 07:55:20,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:55:20,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:55:22,161 WARN L179 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-10 07:55:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:55:22,165 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 07:55:33,086 WARN L179 SmtUtils]: Spent 4.12 s on a formula simplification that was a NOOP. DAG size: 11 [2018-11-10 07:56:00,888 WARN L179 SmtUtils]: Spent 5.91 s on a formula simplification that was a NOOP. DAG size: 12 [2018-11-10 07:56:02,965 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) RNE (/ 5.0 2.0)))) (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 8 24) RNE (_ bv0 32)))))) is different from false [2018-11-10 07:56:05,036 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) RNE (/ 5.0 2.0)))) (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 8 24) RNE (_ bv0 32)))))) is different from true [2018-11-10 07:56:07,131 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from false [2018-11-10 07:56:09,224 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from true [2018-11-10 07:56:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 4 times theorem prover too weak. 0 trivial. 14 not checked. [2018-11-10 07:56:09,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:56:09,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2018-11-10 07:56:09,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 07:56:09,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 07:56:09,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=113, Unknown=11, NotChecked=46, Total=210 [2018-11-10 07:56:09,246 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 15 states. [2018-11-10 07:56:11,353 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) RNE (_ bv0 32))) (.cse0 ((_ to_fp 8 24) RNE (/ 5.0 2.0)))) (and (= c_main_~x1~0 (fp.div RNE ((_ to_fp 8 24) 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 c_main_~x1~0 .cse0) .cse0) .cse0))) (or (fp.eq .cse2 .cse1) (not (fp.eq (fp.div RNE .cse2 .cse0) .cse2)))))) is different from true [2018-11-10 07:56:13,432 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) RNE (_ bv0 32))) (.cse2 ((_ to_fp 8 24) RNE (/ 5.0 2.0)))) (and (or (fp.eq c_main_~x~0 .cse0) (not (fp.eq c_main_~x1~0 c_main_~x~0))) (let ((.cse1 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse2) .cse2))) (or (not (fp.eq (fp.div RNE .cse1 .cse2) .cse1)) (fp.eq .cse1 .cse0))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE ((_ to_fp 8 24) RNE 1.0) .cse2) .cse2)))) is different from true [2018-11-10 07:56:21,182 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) RNE (_ bv0 32)))) (and (or (fp.eq c_main_~x~0 .cse0) (not (fp.eq c_main_~x1~0 c_main_~x~0))) (let ((.cse2 ((_ to_fp 8 24) RNE (/ 5.0 2.0)))) (let ((.cse1 (fp.div RNE c_main_~x1~0 .cse2))) (or (not (fp.eq (fp.div RNE .cse1 .cse2) .cse1)) (fp.eq .cse1 .cse0)))))) is different from true [2018-11-10 07:56:33,697 WARN L179 SmtUtils]: Spent 5.50 s on a formula simplification that was a NOOP. DAG size: 17 [2018-11-10 07:56:39,665 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) RNE (_ bv0 32)))) (and (let ((.cse1 ((_ to_fp 8 24) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2)))) (fp.eq c_main_~x~0 .cse2))) is different from false [2018-11-10 07:56:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:56:50,241 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2018-11-10 07:56:50,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-10 07:56:50,242 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2018-11-10 07:56:50,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:56:50,243 INFO L225 Difference]: With dead ends: 37 [2018-11-10 07:56:50,243 INFO L226 Difference]: Without dead ends: 28 [2018-11-10 07:56:50,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.2s TimeCoverageRelationStatistics Valid=71, Invalid=208, Unknown=17, NotChecked=210, Total=506 [2018-11-10 07:56:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-10 07:56:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-10 07:56:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-10 07:56:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-11-10 07:56:50,250 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 19 [2018-11-10 07:56:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:56:50,250 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-11-10 07:56:50,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 07:56:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-11-10 07:56:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 07:56:50,251 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:56:50,251 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:56:50,252 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:56:50,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:56:50,252 INFO L82 PathProgramCache]: Analyzing trace with hash 397284265, now seen corresponding path program 3 times [2018-11-10 07:56:50,252 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 07:56:50,252 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2318f1df-fbae-4a5f-935d-ed6a80fabbba/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 07:56:50,256 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-10 07:56:50,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 07:56:50,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:56:50,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:56:51,248 WARN L179 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-11-10 07:57:01,854 WARN L179 SmtUtils]: Spent 7.14 s on a formula simplification that was a NOOP. DAG size: 15 [2018-11-10 07:57:03,906 WARN L832 $PredicateComparison]: unable to prove that (and (exists ((v_main_~x~0_14 (_ FloatingPoint 8 24))) (and (not (fp.eq c_main_~x~0 v_main_~x~0_14)) (= c_main_~x~0 (fp.div RNE v_main_~x~0_14 ((_ to_fp 8 24) RNE (/ 5.0 2.0)))))) (fp.eq (fp.div RNE c_main_~x~0 ((_ to_fp 8 24) RNE (/ 5.0 2.0))) c_main_~x~0)) is different from false [2018-11-10 07:57:22,108 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2018-11-10 07:57:22,109 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:150) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:354) 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.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:286) 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$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 45 more [2018-11-10 07:57:22,111 INFO L168 Benchmark]: Toolchain (without parser) took 134389.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 949.7 MB in the beginning and 977.5 MB in the end (delta: -27.7 MB). Peak memory consumption was 102.8 MB. Max. memory is 11.5 GB. [2018-11-10 07:57:22,112 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 07:57:22,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.14 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 937.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-11-10 07:57:22,113 INFO L168 Benchmark]: Boogie Preprocessor took 20.93 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 07:57:22,113 INFO L168 Benchmark]: RCFGBuilder took 424.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 937.9 MB in the beginning and 1.1 GB in the end (delta: -177.8 MB). Peak memory consumption was 26.3 MB. Max. memory is 11.5 GB. [2018-11-10 07:57:22,114 INFO L168 Benchmark]: TraceAbstraction took 133775.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 977.5 MB in the end (delta: 138.3 MB). Peak memory consumption was 138.3 MB. Max. memory is 11.5 GB. [2018-11-10 07:57:22,116 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 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 166.14 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 937.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.93 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 424.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 937.9 MB in the beginning and 1.1 GB in the end (delta: -177.8 MB). Peak memory consumption was 26.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 133775.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 977.5 MB in the end (delta: 138.3 MB). Peak memory consumption was 138.3 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. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: 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...