./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_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_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8571d6e044ba86c3b82c24f6ff451bf497f2aedf ...................................................................................................................................................................................................................................................................................... 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_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8571d6e044ba86c3b82c24f6ff451bf497f2aedf .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2018-10-26 19:15:54,122 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 19:15:54,124 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 19:15:54,135 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 19:15:54,135 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 19:15:54,136 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 19:15:54,138 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 19:15:54,140 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 19:15:54,141 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 19:15:54,142 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 19:15:54,144 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 19:15:54,144 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 19:15:54,145 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 19:15:54,146 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 19:15:54,147 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 19:15:54,148 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 19:15:54,149 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 19:15:54,150 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 19:15:54,152 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 19:15:54,154 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 19:15:54,155 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 19:15:54,156 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 19:15:54,158 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 19:15:54,158 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 19:15:54,159 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 19:15:54,160 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 19:15:54,161 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 19:15:54,162 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 19:15:54,162 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 19:15:54,164 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 19:15:54,164 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 19:15:54,165 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 19:15:54,165 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 19:15:54,166 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 19:15:54,166 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 19:15:54,168 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 19:15:54,168 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 19:15:54,186 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 19:15:54,187 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 19:15:54,191 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 19:15:54,191 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 19:15:54,191 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 19:15:54,192 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 19:15:54,192 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 19:15:54,193 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 19:15:54,193 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 19:15:54,193 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 19:15:54,193 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 19:15:54,195 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 19:15:54,196 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 19:15:54,197 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 19:15:54,197 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 19:15:54,197 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 19:15:54,197 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 19:15:54,198 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 19:15:54,198 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 19:15:54,198 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 19:15:54,198 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 19:15:54,198 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 19:15:54,198 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 19:15:54,199 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 19:15:54,199 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 19:15:54,199 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 19:15:54,199 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 19:15:54,199 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 19:15:54,199 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 19:15:54,200 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 19:15:54,200 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 19:15:54,200 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 19:15:54,200 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 19:15:54,200 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 19:15:54,200 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan 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 -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8571d6e044ba86c3b82c24f6ff451bf497f2aedf [2018-10-26 19:15:54,243 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 19:15:54,254 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 19:15:54,258 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 19:15:54,259 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 19:15:54,260 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 19:15:54,260 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i [2018-10-26 19:15:54,317 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/data/378bc24ff/01a0e2633a2c422f912bba56ed6efd6e/FLAG0279c1ca3 [2018-10-26 19:15:54,686 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 19:15:54,687 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i [2018-10-26 19:15:54,693 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/data/378bc24ff/01a0e2633a2c422f912bba56ed6efd6e/FLAG0279c1ca3 [2018-10-26 19:15:54,709 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/data/378bc24ff/01a0e2633a2c422f912bba56ed6efd6e [2018-10-26 19:15:54,711 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 19:15:54,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 19:15:54,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 19:15:54,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 19:15:54,720 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 19:15:54,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:15:54" (1/1) ... [2018-10-26 19:15:54,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eeeae86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:54, skipping insertion in model container [2018-10-26 19:15:54,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:15:54" (1/1) ... [2018-10-26 19:15:54,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 19:15:54,759 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 19:15:54,896 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:15:54,901 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 19:15:54,913 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:15:54,926 INFO L193 MainTranslator]: Completed translation [2018-10-26 19:15:54,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:54 WrapperNode [2018-10-26 19:15:54,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 19:15:54,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 19:15:54,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 19:15:54,928 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 19:15:54,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:54" (1/1) ... [2018-10-26 19:15:54,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:54" (1/1) ... [2018-10-26 19:15:54,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 19:15:54,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 19:15:54,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 19:15:54,949 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 19:15:54,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:54" (1/1) ... [2018-10-26 19:15:54,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:54" (1/1) ... [2018-10-26 19:15:54,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:54" (1/1) ... [2018-10-26 19:15:54,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:54" (1/1) ... [2018-10-26 19:15:54,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:54" (1/1) ... [2018-10-26 19:15:54,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:54" (1/1) ... [2018-10-26 19:15:54,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:54" (1/1) ... [2018-10-26 19:15:54,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 19:15:54,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 19:15:54,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 19:15:54,968 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 19:15:54,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/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 [2018-10-26 19:15:55,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 19:15:55,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 19:15:55,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 19:15:55,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 19:15:55,082 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 19:15:55,082 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 19:15:55,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 19:15:55,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 19:15:55,339 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 19:15:55,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:15:55 BoogieIcfgContainer [2018-10-26 19:15:55,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 19:15:55,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 19:15:55,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 19:15:55,344 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 19:15:55,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:15:54" (1/3) ... [2018-10-26 19:15:55,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a00c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:15:55, skipping insertion in model container [2018-10-26 19:15:55,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:54" (2/3) ... [2018-10-26 19:15:55,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a00c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:15:55, skipping insertion in model container [2018-10-26 19:15:55,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:15:55" (3/3) ... [2018-10-26 19:15:55,349 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_true-unreach-call.i [2018-10-26 19:15:55,358 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 19:15:55,365 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 19:15:55,380 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 19:15:55,414 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 19:15:55,414 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 19:15:55,415 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 19:15:55,415 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 19:15:55,415 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 19:15:55,415 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 19:15:55,415 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 19:15:55,415 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 19:15:55,432 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-26 19:15:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 19:15:55,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:15:55,444 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:15:55,446 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:15:55,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:15:55,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-10-26 19:15:55,456 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 19:15:55,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:15:55,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:15:55,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:15:55,501 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 19:15:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:15:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:15:55,559 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:15:55,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 19:15:55,559 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 19:15:55,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 19:15:55,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 19:15:55,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 19:15:55,579 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-26 19:15:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:15:55,603 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-10-26 19:15:55,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 19:15:55,605 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-26 19:15:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:15:55,613 INFO L225 Difference]: With dead ends: 31 [2018-10-26 19:15:55,614 INFO L226 Difference]: Without dead ends: 12 [2018-10-26 19:15:55,617 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 [2018-10-26 19:15:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-26 19:15:55,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-26 19:15:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-26 19:15:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-26 19:15:55,644 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-26 19:15:55,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:15:55,644 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-26 19:15:55,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 19:15:55,644 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-26 19:15:55,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 19:15:55,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:15:55,645 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:15:55,645 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:15:55,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:15:55,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-10-26 19:15:55,646 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 19:15:55,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:15:55,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:15:55,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:15:55,647 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 19:15:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 19:15:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 19:15:55,671 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 19:15:55,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 07:15:55 BoogieIcfgContainer [2018-10-26 19:15:55,687 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 19:15:55,688 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 19:15:55,688 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 19:15:55,688 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 19:15:55,689 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:15:55" (3/4) ... [2018-10-26 19:15:55,692 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-10-26 19:15:55,692 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 19:15:55,693 INFO L168 Benchmark]: Toolchain (without parser) took 980.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 181.9 MB). Free memory was 954.4 MB in the beginning and 1.1 GB in the end (delta: -190.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 19:15:55,694 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 19:15:55,695 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.51 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 942.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-10-26 19:15:55,696 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.11 ms. Allocated memory is still 1.0 GB. Free memory is still 942.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 19:15:55,697 INFO L168 Benchmark]: Boogie Preprocessor took 18.95 ms. Allocated memory is still 1.0 GB. Free memory was 942.3 MB in the beginning and 939.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 19:15:55,697 INFO L168 Benchmark]: RCFGBuilder took 372.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 181.9 MB). Free memory was 939.7 MB in the beginning and 1.2 GB in the end (delta: -229.9 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. [2018-10-26 19:15:55,698 INFO L168 Benchmark]: TraceAbstraction took 347.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2018-10-26 19:15:55,698 INFO L168 Benchmark]: Witness Printer took 4.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 19:15:55,703 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 212.51 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 942.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.11 ms. Allocated memory is still 1.0 GB. Free memory is still 942.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.95 ms. Allocated memory is still 1.0 GB. Free memory was 942.3 MB in the beginning and 939.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 372.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 181.9 MB). Free memory was 939.7 MB in the beginning and 1.2 GB in the end (delta: -229.9 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 347.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * Witness Printer took 4.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 2]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 12, overapproximation of someBinaryArithmeticDOUBLEoperation at line 10. Possible FailurePath: [L9] double x = 1.0; [L10] double x1 = x/2.5; 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, 0.2s 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 [2018-10-26 19:15:57,702 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 19:15:57,703 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 19:15:57,717 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 19:15:57,717 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 19:15:57,718 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 19:15:57,718 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 19:15:57,720 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 19:15:57,721 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 19:15:57,722 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 19:15:57,723 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 19:15:57,723 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 19:15:57,724 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 19:15:57,725 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 19:15:57,726 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 19:15:57,726 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 19:15:57,727 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 19:15:57,729 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 19:15:57,730 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 19:15:57,732 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 19:15:57,733 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 19:15:57,734 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 19:15:57,736 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 19:15:57,736 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 19:15:57,736 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 19:15:57,737 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 19:15:57,738 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 19:15:57,738 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 19:15:57,740 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 19:15:57,741 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 19:15:57,741 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 19:15:57,741 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 19:15:57,742 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 19:15:57,742 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 19:15:57,742 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 19:15:57,744 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 19:15:57,744 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-10-26 19:15:57,755 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 19:15:57,755 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 19:15:57,756 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 19:15:57,756 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 19:15:57,756 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 19:15:57,756 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 19:15:57,757 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 19:15:57,757 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 19:15:57,757 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 19:15:57,757 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 19:15:57,757 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 19:15:57,758 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 19:15:57,758 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 19:15:57,758 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 19:15:57,758 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 19:15:57,758 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-10-26 19:15:57,758 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-10-26 19:15:57,758 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 19:15:57,758 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 19:15:57,759 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 19:15:57,761 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 19:15:57,761 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 19:15:57,761 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 19:15:57,761 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 19:15:57,761 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 19:15:57,761 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 19:15:57,762 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 19:15:57,762 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 19:15:57,762 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-10-26 19:15:57,762 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 19:15:57,762 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-10-26 19:15:57,762 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-10-26 19:15:57,762 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_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan 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 -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8571d6e044ba86c3b82c24f6ff451bf497f2aedf [2018-10-26 19:15:57,795 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 19:15:57,804 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 19:15:57,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 19:15:57,808 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 19:15:57,808 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 19:15:57,809 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i [2018-10-26 19:15:57,849 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/data/dc500cd96/324f20e5198147cea82a8697aeaa1b74/FLAG13bab1ec7 [2018-10-26 19:15:58,217 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 19:15:58,218 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i [2018-10-26 19:15:58,222 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/data/dc500cd96/324f20e5198147cea82a8697aeaa1b74/FLAG13bab1ec7 [2018-10-26 19:15:58,235 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/data/dc500cd96/324f20e5198147cea82a8697aeaa1b74 [2018-10-26 19:15:58,238 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 19:15:58,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 19:15:58,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 19:15:58,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 19:15:58,247 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 19:15:58,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:15:58" (1/1) ... [2018-10-26 19:15:58,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e1b2c31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:58, skipping insertion in model container [2018-10-26 19:15:58,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:15:58" (1/1) ... [2018-10-26 19:15:58,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 19:15:58,279 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 19:15:58,429 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:15:58,436 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 19:15:58,450 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:15:58,465 INFO L193 MainTranslator]: Completed translation [2018-10-26 19:15:58,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:58 WrapperNode [2018-10-26 19:15:58,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 19:15:58,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 19:15:58,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 19:15:58,466 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 19:15:58,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:58" (1/1) ... [2018-10-26 19:15:58,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:58" (1/1) ... [2018-10-26 19:15:58,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 19:15:58,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 19:15:58,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 19:15:58,490 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 19:15:58,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:58" (1/1) ... [2018-10-26 19:15:58,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:58" (1/1) ... [2018-10-26 19:15:58,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:58" (1/1) ... [2018-10-26 19:15:58,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:58" (1/1) ... [2018-10-26 19:15:58,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:58" (1/1) ... [2018-10-26 19:15:58,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:58" (1/1) ... [2018-10-26 19:15:58,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:58" (1/1) ... [2018-10-26 19:15:58,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 19:15:58,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 19:15:58,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 19:15:58,516 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 19:15:58,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/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 [2018-10-26 19:15:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 19:15:58,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 19:15:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 19:15:58,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 19:15:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 19:15:58,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 19:15:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 19:15:58,564 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 19:15:59,618 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 19:15:59,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:15:59 BoogieIcfgContainer [2018-10-26 19:15:59,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 19:15:59,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 19:15:59,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 19:15:59,623 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 19:15:59,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:15:58" (1/3) ... [2018-10-26 19:15:59,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a73634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:15:59, skipping insertion in model container [2018-10-26 19:15:59,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:15:58" (2/3) ... [2018-10-26 19:15:59,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a73634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:15:59, skipping insertion in model container [2018-10-26 19:15:59,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:15:59" (3/3) ... [2018-10-26 19:15:59,628 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_true-unreach-call.i [2018-10-26 19:15:59,638 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 19:15:59,645 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 19:15:59,659 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 19:15:59,690 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 19:15:59,691 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 19:15:59,691 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 19:15:59,691 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 19:15:59,691 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 19:15:59,691 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 19:15:59,692 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 19:15:59,692 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 19:15:59,692 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 19:15:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-26 19:15:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 19:15:59,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:15:59,717 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:15:59,720 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:15:59,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:15:59,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-10-26 19:15:59,731 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 19:15:59,732 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-10-26 19:15:59,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-10-26 19:15:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:15:59,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:15:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:15:59,951 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-26 19:15:59,964 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:15:59,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 19:15:59,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 19:15:59,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 19:15:59,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 19:15:59,977 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-26 19:15:59,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:15:59,996 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-10-26 19:15:59,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 19:15:59,998 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-26 19:15:59,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:16:00,006 INFO L225 Difference]: With dead ends: 31 [2018-10-26 19:16:00,006 INFO L226 Difference]: Without dead ends: 12 [2018-10-26 19:16:00,009 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 [2018-10-26 19:16:00,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-26 19:16:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-26 19:16:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-26 19:16:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-26 19:16:00,041 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-26 19:16:00,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:16:00,042 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-26 19:16:00,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 19:16:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-26 19:16:00,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 19:16:00,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:16:00,043 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:16:00,044 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:16:00,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:16:00,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-10-26 19:16:00,044 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 19:16:00,044 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/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 [2018-10-26 19:16:00,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:16:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:16:00,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:16:02,909 WARN L179 SmtUtils]: Spent 2.62 s on a formula simplification that was a NOOP. DAG size: 11 [2018-10-26 19:16:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:16:02,929 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-26 19:16:02,945 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:16:02,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:16:02,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 19:16:02,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 19:16:02,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:16:02,947 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-10-26 19:16:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:16:04,481 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-26 19:16:05,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 19:16:05,258 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-26 19:16:05,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:16:05,259 INFO L225 Difference]: With dead ends: 19 [2018-10-26 19:16:05,259 INFO L226 Difference]: Without dead ends: 14 [2018-10-26 19:16:05,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:16:05,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-26 19:16:05,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-26 19:16:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-26 19:16:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-26 19:16:05,267 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-26 19:16:05,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:16:05,268 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-26 19:16:05,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 19:16:05,268 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-26 19:16:05,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 19:16:05,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:16:05,269 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:16:05,269 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:16:05,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:16:05,270 INFO L82 PathProgramCache]: Analyzing trace with hash -661808769, now seen corresponding path program 1 times [2018-10-26 19:16:05,270 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 19:16:05,270 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/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 [2018-10-26 19:16:05,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:16:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:16:05,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:16:07,898 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (and (= c_main_~x1~0 (fp.div RNE c_main_~x~0 .cse0)) (= (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) c_main_~x~0))) is different from true [2018-10-26 19:16:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2018-10-26 19:16:07,915 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 19:16:17,157 WARN L179 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 7 [2018-10-26 19:16:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:16:17,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:16:17,192 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 19:16:17,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:16:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:16:22,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:16:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2018-10-26 19:16:22,524 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 19:16:28,961 WARN L854 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x1~0)) (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32)))) is different from true [2018-10-26 19:16:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2018-10-26 19:16:29,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 19:16:29,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 7] total 11 [2018-10-26 19:16:29,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 19:16:29,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 19:16:29,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=54, Unknown=4, NotChecked=30, Total=110 [2018-10-26 19:16:29,089 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2018-10-26 19:16:31,362 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (and (= c_main_~x1~0 (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0)) (or (not (fp.eq (fp.div RNE c_main_~x1~0 .cse0) c_main_~x1~0)) (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32)))) (not (fp.eq c_main_~x1~0 c_main_~x~0)))) is different from true [2018-10-26 19:16:33,568 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (and (= c_main_~x1~0 (fp.div RNE c_main_~x~0 .cse0)) (= (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) c_main_~x~0) (not (fp.eq c_main_~x1~0 c_main_~x~0)))) is different from true [2018-10-26 19:16:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:16:38,124 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-26 19:16:38,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:16:38,125 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2018-10-26 19:16:38,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:16:38,126 INFO L225 Difference]: With dead ends: 21 [2018-10-26 19:16:38,126 INFO L226 Difference]: Without dead ends: 16 [2018-10-26 19:16:38,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=26, Invalid=56, Unknown=6, NotChecked=68, Total=156 [2018-10-26 19:16:38,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-26 19:16:38,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-26 19:16:38,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-26 19:16:38,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-26 19:16:38,131 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-26 19:16:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:16:38,131 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-26 19:16:38,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 19:16:38,131 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-26 19:16:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-26 19:16:38,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:16:38,132 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:16:38,132 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:16:38,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:16:38,132 INFO L82 PathProgramCache]: Analyzing trace with hash 622365701, now seen corresponding path program 2 times [2018-10-26 19:16:38,132 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 19:16:38,132 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/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 [2018-10-26 19:16:38,140 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-10-26 19:16:38,682 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 19:16:38,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 19:16:38,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:16:44,949 WARN L179 SmtUtils]: Spent 2.86 s on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 19:16:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:16:44,953 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 19:17:22,560 WARN L179 SmtUtils]: Spent 9.08 s on a formula simplification that was a NOOP. DAG size: 11 [2018-10-26 19:17:24,938 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (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 [2018-10-26 19:17:27,330 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (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 [2018-10-26 19:17:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2018-10-26 19:17:27,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:17:27,363 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 19:17:27,370 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 19:17:40,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 19:17:40,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-10-26 19:17:42,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 19:17:42,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 11 [2018-10-26 19:17:42,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 19:17:42,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 19:17:42,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=61, Unknown=9, NotChecked=16, Total=110 [2018-10-26 19:17:42,354 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 11 states. [2018-10-26 19:17:44,781 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) (.cse1 ((_ to_fp 11 53) RNE (_ bv0 32)))) (and (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse2))) (or (fp.eq .cse0 .cse1) (not (fp.eq (fp.div RNE .cse0 .cse2) .cse0)))) (= c_main_~x1~0 (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse2)) (or (fp.eq c_main_~x~0 .cse1) (not (fp.eq c_main_~x1~0 c_main_~x~0))))) is different from true [2018-10-26 19:17:59,522 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))) (and (fp.eq c_main_~x~0 .cse0) (or (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x1~0)) (fp.eq c_main_~x1~0 .cse0)))) is different from true [2018-10-26 19:18:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:18:09,449 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-10-26 19:18:09,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 19:18:09,450 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2018-10-26 19:18:09,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:18:09,451 INFO L225 Difference]: With dead ends: 28 [2018-10-26 19:18:09,451 INFO L226 Difference]: Without dead ends: 20 [2018-10-26 19:18:09,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=12, NotChecked=66, Total=210 [2018-10-26 19:18:09,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-26 19:18:09,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-26 19:18:09,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-26 19:18:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-26 19:18:09,457 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 15 [2018-10-26 19:18:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:18:09,457 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-26 19:18:09,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 19:18:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-26 19:18:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-26 19:18:09,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:18:09,458 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:18:09,458 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:18:09,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:18:09,459 INFO L82 PathProgramCache]: Analyzing trace with hash -875350895, now seen corresponding path program 3 times [2018-10-26 19:18:09,460 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 19:18:09,460 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/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 [2018-10-26 19:18:09,469 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-10-26 19:18:10,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 19:18:10,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 19:18:10,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:18:15,322 WARN L179 SmtUtils]: Spent 2.92 s on a formula simplification that was a NOOP. DAG size: 7 [2018-10-26 19:18:17,765 WARN L832 $PredicateComparison]: unable to prove that (and (= c_main_~x1~0 (fp.div RNE c_main_~x~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (exists ((v_main_~x~0_14 (_ FloatingPoint 11 53))) (let ((.cse0 (fp.div RNE v_main_~x~0_14 ((_ to_fp 11 53) RNE (/ 5.0 2.0))))) (and (not (fp.eq .cse0 v_main_~x~0_14)) (= .cse0 c_main_~x~0))))) is different from false [2018-10-26 19:18:20,023 WARN L854 $PredicateComparison]: unable to prove that (and (= c_main_~x1~0 (fp.div RNE c_main_~x~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (exists ((v_main_~x~0_14 (_ FloatingPoint 11 53))) (let ((.cse0 (fp.div RNE v_main_~x~0_14 ((_ to_fp 11 53) RNE (/ 5.0 2.0))))) (and (not (fp.eq .cse0 v_main_~x~0_14)) (= .cse0 c_main_~x~0))))) is different from true [2018-10-26 19:18:22,499 WARN L832 $PredicateComparison]: unable to prove that (and (fp.eq (fp.div RNE c_main_~x~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x~0) (exists ((v_main_~x~0_14 (_ FloatingPoint 11 53))) (let ((.cse0 (fp.div RNE v_main_~x~0_14 ((_ to_fp 11 53) RNE (/ 5.0 2.0))))) (and (not (fp.eq .cse0 v_main_~x~0_14)) (= .cse0 c_main_~x~0))))) is different from false [2018-10-26 19:18:24,728 WARN L854 $PredicateComparison]: unable to prove that (and (fp.eq (fp.div RNE c_main_~x~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x~0) (exists ((v_main_~x~0_14 (_ FloatingPoint 11 53))) (let ((.cse0 (fp.div RNE v_main_~x~0_14 ((_ to_fp 11 53) RNE (/ 5.0 2.0))))) (and (not (fp.eq .cse0 v_main_~x~0_14)) (= .cse0 c_main_~x~0))))) is different from true [2018-10-26 19:18:37,195 WARN L832 $PredicateComparison]: unable to prove that (or (and (exists ((v_main_~x~0_14 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_main_~x~0_14 .cse1))) (and (not (fp.eq .cse0 v_main_~x~0_14)) (not (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) (= |c___VERIFIER_assert_#in~cond| (_ bv0 32))) (and (= (bvadd |c___VERIFIER_assert_#in~cond| (_ bv4294967295 32)) (_ bv0 32)) (exists ((v_prenex_2 (_ FloatingPoint 11 53))) (let ((.cse3 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse2 (fp.div RNE v_prenex_2 .cse3))) (and (not (fp.eq .cse2 v_prenex_2)) (fp.eq (fp.div RNE .cse2 .cse3) .cse2) (fp.eq .cse2 ((_ to_fp 11 53) RNE (_ bv0 32))))))))) is different from false [2018-10-26 19:18:49,622 WARN L832 $PredicateComparison]: unable to prove that (or (and (exists ((v_prenex_2 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_prenex_2 .cse1))) (and (not (fp.eq .cse0 v_prenex_2)) (fp.eq (fp.div RNE .cse0 .cse1) .cse0) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))))))) (= (bvadd c___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) (and (exists ((v_main_~x~0_14 (_ FloatingPoint 11 53))) (let ((.cse3 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse2 (fp.div RNE v_main_~x~0_14 .cse3))) (and (not (fp.eq .cse2 v_main_~x~0_14)) (not (fp.eq .cse2 ((_ to_fp 11 53) RNE (_ bv0 32)))) (fp.eq (fp.div RNE .cse2 .cse3) .cse2))))) (= (_ bv0 32) c___VERIFIER_assert_~cond))) is different from false [2018-10-26 19:18:56,870 WARN L832 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_14 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_main_~x~0_14 .cse1))) (and (not (fp.eq .cse0 v_main_~x~0_14)) (not (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from false [2018-10-26 19:18:59,236 WARN L854 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_14 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_main_~x~0_14 .cse1))) (and (not (fp.eq .cse0 v_main_~x~0_14)) (not (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from true [2018-10-26 19:18:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2018-10-26 19:18:59,240 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 19:19:45,197 WARN L179 SmtUtils]: Spent 14.25 s on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 19:19:52,308 WARN L832 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_16 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_main_~x~0_16 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (fp.eq .cse0 v_main_~x~0_16) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))))) is different from false [2018-10-26 19:19:54,703 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_16 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_main_~x~0_16 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (fp.eq .cse0 v_main_~x~0_16) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))))) is different from true [2018-10-26 19:20:33,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:20:33,251 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_932d76e7-7201-4f4e-90bd-bc6d8c5e3883/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 19:20:33,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 19:21:15,721 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-26 19:21:15,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-10-26 19:21:17,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:21:17,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-26 19:21:17,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 19:21:17,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 19:21:17,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=36, Unknown=18, NotChecked=102, Total=182 [2018-10-26 19:21:17,723 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2018-10-26 19:21:20,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:21:20,284 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-26 19:21:20,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 19:21:20,704 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-10-26 19:21:20,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:21:20,704 INFO L225 Difference]: With dead ends: 20 [2018-10-26 19:21:20,705 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 19:21:20,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.5s TimeCoverageRelationStatistics Valid=26, Invalid=36, Unknown=18, NotChecked=102, Total=182 [2018-10-26 19:21:20,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 19:21:20,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 19:21:20,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 19:21:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 19:21:20,706 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2018-10-26 19:21:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:21:20,706 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 19:21:20,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 19:21:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 19:21:20,707 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 19:21:20,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 19:22:04,499 WARN L179 SmtUtils]: Spent 43.69 s on a formula simplification that was a NOOP. DAG size: 25 [2018-10-26 19:22:06,417 WARN L179 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 44 DAG size of output: 1 [2018-10-26 19:23:07,568 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:626) 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:191) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:150) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplifyWithStatistics(SmtUtils.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeCFGHoareAnnotation(BasicCegarLoop.java:982) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:324) 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) ... 31 more [2018-10-26 19:23:07,570 INFO L168 Benchmark]: Toolchain (without parser) took 429331.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.0 MB). Free memory was 953.2 MB in the beginning and 991.6 MB in the end (delta: -38.4 MB). Peak memory consumption was 134.6 MB. Max. memory is 11.5 GB. [2018-10-26 19:23:07,571 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. [2018-10-26 19:23:07,571 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.92 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 19:23:07,572 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.51 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 19:23:07,572 INFO L168 Benchmark]: Boogie Preprocessor took 24.43 ms. Allocated memory is still 1.0 GB. Free memory was 942.5 MB in the beginning and 937.1 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-10-26 19:23:07,573 INFO L168 Benchmark]: RCFGBuilder took 1104.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.0 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -211.8 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2018-10-26 19:23:07,573 INFO L168 Benchmark]: TraceAbstraction took 427950.00 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 991.6 MB in the end (delta: 157.3 MB). Peak memory consumption was 157.3 MB. Max. memory is 11.5 GB. [2018-10-26 19:23:07,582 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 224.92 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.51 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.43 ms. Allocated memory is still 1.0 GB. Free memory was 942.5 MB in the beginning and 937.1 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 1104.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.0 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -211.8 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 427950.00 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 991.6 MB in the end (delta: 157.3 MB). Peak memory consumption was 157.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - 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...