./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i.p+cfa-reducer.c -s /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/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 14660901cc5c4d61dda44d0e62586d716b569100 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i.p+cfa-reducer.c -s /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/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 14660901cc5c4d61dda44d0e62586d716b569100 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-22 22:10:40,736 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-22 22:10:40,738 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-22 22:10:40,747 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-22 22:10:40,747 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-22 22:10:40,748 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-22 22:10:40,749 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-22 22:10:40,750 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-22 22:10:40,751 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-22 22:10:40,752 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-22 22:10:40,752 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-22 22:10:40,753 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-22 22:10:40,753 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-22 22:10:40,754 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-22 22:10:40,755 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-22 22:10:40,755 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-22 22:10:40,756 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-22 22:10:40,757 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-22 22:10:40,758 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-22 22:10:40,760 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-22 22:10:40,760 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-22 22:10:40,761 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-22 22:10:40,763 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-22 22:10:40,763 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-22 22:10:40,763 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-22 22:10:40,764 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-22 22:10:40,765 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-22 22:10:40,765 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-22 22:10:40,766 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-22 22:10:40,767 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-22 22:10:40,767 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-22 22:10:40,767 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-22 22:10:40,767 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-22 22:10:40,767 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-22 22:10:40,768 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-22 22:10:40,769 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-22 22:10:40,769 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-22 22:10:40,780 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-22 22:10:40,780 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-22 22:10:40,781 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-22 22:10:40,781 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-22 22:10:40,781 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-22 22:10:40,781 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-22 22:10:40,781 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-22 22:10:40,781 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-22 22:10:40,782 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-22 22:10:40,782 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-22 22:10:40,782 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-22 22:10:40,782 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-22 22:10:40,782 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-22 22:10:40,783 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-22 22:10:40,783 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-22 22:10:40,783 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-22 22:10:40,783 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-22 22:10:40,783 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-22 22:10:40,783 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-22 22:10:40,783 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-22 22:10:40,784 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-22 22:10:40,784 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-22 22:10:40,784 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-22 22:10:40,784 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-22 22:10:40,784 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-22 22:10:40,784 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-22 22:10:40,785 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-22 22:10:40,785 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-22 22:10:40,785 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-22 22:10:40,785 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-22 22:10:40,785 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-22 22:10:40,785 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-22 22:10:40,785 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-22 22:10:40,785 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-22 22:10:40,786 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-22 22:10:40,786 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-22 22:10:40,786 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-22 22:10:40,786 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_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/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 -> 14660901cc5c4d61dda44d0e62586d716b569100 [2018-11-22 22:10:40,810 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-22 22:10:40,821 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-22 22:10:40,824 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-22 22:10:40,825 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-22 22:10:40,826 INFO L276 PluginConnector]: CDTParser initialized [2018-11-22 22:10:40,826 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i.p+cfa-reducer.c [2018-11-22 22:10:40,877 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/data/ff877b2df/62bddc8ffb0e4a549530ee0295becddb/FLAG16edfb71b [2018-11-22 22:10:41,254 INFO L307 CDTParser]: Found 1 translation units. [2018-11-22 22:10:41,254 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i.p+cfa-reducer.c [2018-11-22 22:10:41,259 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/data/ff877b2df/62bddc8ffb0e4a549530ee0295becddb/FLAG16edfb71b [2018-11-22 22:10:41,273 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/data/ff877b2df/62bddc8ffb0e4a549530ee0295becddb [2018-11-22 22:10:41,276 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-22 22:10:41,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-22 22:10:41,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-22 22:10:41,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-22 22:10:41,282 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-22 22:10:41,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:10:41" (1/1) ... [2018-11-22 22:10:41,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fae5e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:41, skipping insertion in model container [2018-11-22 22:10:41,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:10:41" (1/1) ... [2018-11-22 22:10:41,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-22 22:10:41,311 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-22 22:10:41,464 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 22:10:41,468 INFO L191 MainTranslator]: Completed pre-run [2018-11-22 22:10:41,478 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 22:10:41,487 INFO L195 MainTranslator]: Completed translation [2018-11-22 22:10:41,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:41 WrapperNode [2018-11-22 22:10:41,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-22 22:10:41,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-22 22:10:41,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-22 22:10:41,488 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-22 22:10:41,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:41" (1/1) ... [2018-11-22 22:10:41,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:41" (1/1) ... [2018-11-22 22:10:41,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-22 22:10:41,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-22 22:10:41,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-22 22:10:41,505 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-22 22:10:41,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:41" (1/1) ... [2018-11-22 22:10:41,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:41" (1/1) ... [2018-11-22 22:10:41,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:41" (1/1) ... [2018-11-22 22:10:41,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:41" (1/1) ... [2018-11-22 22:10:41,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:41" (1/1) ... [2018-11-22 22:10:41,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:41" (1/1) ... [2018-11-22 22:10:41,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:41" (1/1) ... [2018-11-22 22:10:41,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-22 22:10:41,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-22 22:10:41,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-22 22:10:41,518 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-22 22:10:41,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/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 [2018-11-22 22:10:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-22 22:10:41,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-22 22:10:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-22 22:10:41,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-22 22:10:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-22 22:10:41,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-22 22:10:41,696 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-22 22:10:41,696 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-22 22:10:41,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:10:41 BoogieIcfgContainer [2018-11-22 22:10:41,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-22 22:10:41,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-22 22:10:41,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-22 22:10:41,699 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-22 22:10:41,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 10:10:41" (1/3) ... [2018-11-22 22:10:41,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244c4deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:10:41, skipping insertion in model container [2018-11-22 22:10:41,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:41" (2/3) ... [2018-11-22 22:10:41,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244c4deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:10:41, skipping insertion in model container [2018-11-22 22:10:41,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:10:41" (3/3) ... [2018-11-22 22:10:41,701 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_bad_false-unreach-call.i.p+cfa-reducer.c [2018-11-22 22:10:41,708 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-22 22:10:41,713 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-22 22:10:41,724 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-22 22:10:41,745 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-22 22:10:41,745 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-22 22:10:41,745 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-22 22:10:41,746 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-22 22:10:41,746 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-22 22:10:41,746 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-22 22:10:41,746 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-22 22:10:41,746 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-22 22:10:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-11-22 22:10:41,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-22 22:10:41,762 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:10:41,762 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:10:41,764 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:10:41,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:10:41,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1301230683, now seen corresponding path program 1 times [2018-11-22 22:10:41,769 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 22:10:41,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:10:41,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:10:41,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:10:41,811 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 22:10:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:10:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:10:41,854 INFO L469 BasicCegarLoop]: Counterexample might be feasible ----- class de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator [?] CALL call ULTIMATE.init(); VAL [|old(~__return_main~0)|=2, ~__return_main~0=2] [?] ~__return_main~0 := 0; VAL [|old(~__return_main~0)|=2, ~__return_main~0=0] [?] assume true; VAL [|old(~__return_main~0)|=2, ~__return_main~0=0] [?] RET #20#return; VAL [~__return_main~0=0] [?] CALL call #t~ret0 := main(); VAL [~__return_main~0=0] [?] ~main__x~0 := 1.0;~main__x1~0 := ~someBinaryArithmeticDOUBLEoperation(~main__x~0, 1.6); VAL [main_~main__x~0=1.0, ~__return_main~0=0] [?] assume !~someBinaryDOUBLEComparisonOperation(~main__x1~0, ~main__x~0);havoc ~__tmp_1~0;~__tmp_1~0 := (if ~someBinaryDOUBLEComparisonOperation(~main__x~0, ~convertINTToDOUBLE(0)) then 1 else 0);havoc ~__VERIFIER_assert__cond~0;~__VERIFIER_assert__cond~0 := ~__tmp_1~0; VAL [main_~__tmp_1~0=0, main_~__VERIFIER_assert__cond~0=0, main_~main__x~0=1.0, ~__return_main~0=0] [?] assume 0 == ~__VERIFIER_assert__cond~0; VAL [main_~__tmp_1~0=0, main_~__VERIFIER_assert__cond~0=0, main_~main__x~0=1.0, ~__return_main~0=0] [?] assume !false; VAL [main_~__tmp_1~0=0, main_~__VERIFIER_assert__cond~0=0, main_~main__x~0=1.0, ~__return_main~0=0] [?] CALL call ULTIMATE.init(); VAL [old(~__return_main~0)=2, ~__return_main~0=2] [L1] ~__return_main~0 := 0; VAL [old(~__return_main~0)=2, ~__return_main~0=0] [?] ensures true; VAL [old(~__return_main~0)=2, ~__return_main~0=0] [?] RET call ULTIMATE.init(); VAL [~__return_main~0=0] [?] CALL call #t~ret0 := main(); VAL [~__return_main~0=0] [L7] ~main__x~0 := 1.0; [L8] ~main__x1~0 := ~someBinaryArithmeticDOUBLEoperation(~main__x~0, 1.6); VAL [~__return_main~0=0, ~main__x~0=1.0] [L10-L33] assume !~someBinaryDOUBLEComparisonOperation(~main__x1~0, ~main__x~0); [L19] havoc ~__tmp_1~0; [L20] ~__tmp_1~0 := (if ~someBinaryDOUBLEComparisonOperation(~main__x~0, ~convertINTToDOUBLE(0)) then 1 else 0); [L21] havoc ~__VERIFIER_assert__cond~0; [L22] ~__VERIFIER_assert__cond~0 := ~__tmp_1~0; VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] [L23-L31] assume 0 == ~__VERIFIER_assert__cond~0; VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] [L25] assert false; VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] ----- ----- class de.uni_freiburg.informatik.ultimate.boogie.preprocessor.BoogiePreprocessorBacktranslator [?] CALL call ULTIMATE.init(); VAL [old(~__return_main~0)=2, ~__return_main~0=2] [L1] ~__return_main~0 := 0; VAL [old(~__return_main~0)=2, ~__return_main~0=0] [?] ensures true; VAL [old(~__return_main~0)=2, ~__return_main~0=0] [?] RET call ULTIMATE.init(); VAL [~__return_main~0=0] [?] CALL call #t~ret0 := main(); VAL [~__return_main~0=0] [L7] ~main__x~0 := 1.0; [L8] ~main__x1~0 := ~someBinaryArithmeticDOUBLEoperation(~main__x~0, 1.6); VAL [~__return_main~0=0, ~main__x~0=1.0] [L10-L33] assume !~someBinaryDOUBLEComparisonOperation(~main__x1~0, ~main__x~0); [L19] havoc ~__tmp_1~0; [L20] ~__tmp_1~0 := (if ~someBinaryDOUBLEComparisonOperation(~main__x~0, ~convertINTToDOUBLE(0)) then 1 else 0); [L21] havoc ~__VERIFIER_assert__cond~0; [L22] ~__VERIFIER_assert__cond~0 := ~__tmp_1~0; VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] [L23-L31] assume 0 == ~__VERIFIER_assert__cond~0; VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] [L25] assert false; VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] [?] CALL call ULTIMATE.init(); VAL [old(~__return_main~0)=2, ~__return_main~0=2] [L1] ~__return_main~0 := 0; VAL [old(~__return_main~0)=2, ~__return_main~0=0] [?] RET call ULTIMATE.init(); VAL [~__return_main~0=0] [?] CALL call #t~ret0 := main(); VAL [~__return_main~0=0] [L7] ~main__x~0 := 1.0; [L8] ~main__x1~0 := ~someBinaryArithmeticDOUBLEoperation(~main__x~0, 1.6); VAL [~__return_main~0=0, ~main__x~0=1.0] [L10] COND FALSE !(~someBinaryDOUBLEComparisonOperation(~main__x1~0, ~main__x~0)) [L19] havoc ~__tmp_1~0; [L20] ~__tmp_1~0 := (if ~someBinaryDOUBLEComparisonOperation(~main__x~0, ~convertINTToDOUBLE(0)) then 1 else 0); [L21] havoc ~__VERIFIER_assert__cond~0; [L22] ~__VERIFIER_assert__cond~0 := ~__tmp_1~0; VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] [L23] COND TRUE 0 == ~__VERIFIER_assert__cond~0 VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] [L25] assert false; VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] ----- ----- class de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator [?] CALL call ULTIMATE.init(); VAL [old(~__return_main~0)=2, ~__return_main~0=2] [L1] ~__return_main~0 := 0; VAL [old(~__return_main~0)=2, ~__return_main~0=0] [?] RET call ULTIMATE.init(); VAL [~__return_main~0=0] [?] CALL call #t~ret0 := main(); VAL [~__return_main~0=0] [L7] ~main__x~0 := 1.0; [L8] ~main__x1~0 := ~someBinaryArithmeticDOUBLEoperation(~main__x~0, 1.6); VAL [~__return_main~0=0, ~main__x~0=1.0] [L10] COND FALSE !(~someBinaryDOUBLEComparisonOperation(~main__x1~0, ~main__x~0)) [L19] havoc ~__tmp_1~0; [L20] ~__tmp_1~0 := (if ~someBinaryDOUBLEComparisonOperation(~main__x~0, ~convertINTToDOUBLE(0)) then 1 else 0); [L21] havoc ~__VERIFIER_assert__cond~0; [L22] ~__VERIFIER_assert__cond~0 := ~__tmp_1~0; VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] [L23] COND TRUE 0 == ~__VERIFIER_assert__cond~0 VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] [L25] assert false; VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] [?] CALL call ULTIMATE.init(); VAL [old(~__return_main~0)=2, ~__return_main~0=2] [L1] ~__return_main~0 := 0; VAL [old(~__return_main~0)=2, ~__return_main~0=0] [?] RET call ULTIMATE.init(); VAL [~__return_main~0=0] [?] CALL call #t~ret0 := main(); VAL [~__return_main~0=0] [L7] ~main__x~0 := 1.0; [L8] ~main__x1~0 := ~someBinaryArithmeticDOUBLEoperation(~main__x~0, 1.6); VAL [~__return_main~0=0, ~main__x~0=1.0] [L10] COND FALSE !(~someBinaryDOUBLEComparisonOperation(~main__x1~0, ~main__x~0)) [L19] havoc ~__tmp_1~0; [L20] ~__tmp_1~0 := (if ~someBinaryDOUBLEComparisonOperation(~main__x~0, ~convertINTToDOUBLE(0)) then 1 else 0); [L21] havoc ~__VERIFIER_assert__cond~0; [L22] ~__VERIFIER_assert__cond~0 := ~__tmp_1~0; VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] [L23] COND TRUE 0 == ~__VERIFIER_assert__cond~0 VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] [L25] assert false; VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] ----- ----- class de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieBacktranslator [?] CALL call ULTIMATE.init(); VAL [old(~__return_main~0)=2, ~__return_main~0=2] [L1] ~__return_main~0 := 0; VAL [old(~__return_main~0)=2, ~__return_main~0=0] [?] RET call ULTIMATE.init(); VAL [~__return_main~0=0] [?] CALL call #t~ret0 := main(); VAL [~__return_main~0=0] [L7] ~main__x~0 := 1.0; [L8] ~main__x1~0 := ~someBinaryArithmeticDOUBLEoperation(~main__x~0, 1.6); VAL [~__return_main~0=0, ~main__x~0=1.0] [L10] COND FALSE !(~someBinaryDOUBLEComparisonOperation(~main__x1~0, ~main__x~0)) [L19] havoc ~__tmp_1~0; [L20] ~__tmp_1~0 := (if ~someBinaryDOUBLEComparisonOperation(~main__x~0, ~convertINTToDOUBLE(0)) then 1 else 0); [L21] havoc ~__VERIFIER_assert__cond~0; [L22] ~__VERIFIER_assert__cond~0 := ~__tmp_1~0; VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] [L23] COND TRUE 0 == ~__VERIFIER_assert__cond~0 VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] [L25] assert false; VAL [~__return_main~0=0, ~__tmp_1~0=0, ~__VERIFIER_assert__cond~0=0, ~main__x~0=1.0] [L1] int __return_main; VAL [\old(__return_main)=2, __return_main=0] [L7] double main__x = 1.0; [L8] double main__x1 = main__x / 1.6; VAL [__return_main=0, main__x=1] [L10] COND FALSE !(main__x1 != main__x) [L19] int __tmp_1; [L20] __tmp_1 = main__x == 0 [L21] int __VERIFIER_assert__cond; [L22] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L23] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L25] __VERIFIER_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] ----- [2018-11-22 22:10:41,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 10:10:41 BoogieIcfgContainer [2018-11-22 22:10:41,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-22 22:10:41,882 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-22 22:10:41,882 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-22 22:10:41,882 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-22 22:10:41,883 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:10:41" (3/4) ... [2018-11-22 22:10:41,885 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-22 22:10:41,886 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-22 22:10:41,886 INFO L168 Benchmark]: Toolchain (without parser) took 610.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.8 MB). Free memory was 959.1 MB in the beginning and 1.1 GB in the end (delta: -162.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 22:10:41,888 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 22:10:41,888 INFO L168 Benchmark]: CACSL2BoogieTranslator took 210.11 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-22 22:10:41,889 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.32 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 22:10:41,889 INFO L168 Benchmark]: Boogie Preprocessor took 12.98 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-22 22:10:41,890 INFO L168 Benchmark]: RCFGBuilder took 178.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.8 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -195.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. [2018-11-22 22:10:41,891 INFO L168 Benchmark]: TraceAbstraction took 184.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. [2018-11-22 22:10:41,891 INFO L168 Benchmark]: Witness Printer took 3.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2018-11-22 22:10:41,894 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 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 210.11 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 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 16.32 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.98 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 178.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.8 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -195.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 184.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. * Witness Printer took 3.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 25]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 10, overapproximation of someBinaryArithmeticDOUBLEoperation at line 8. Possible FailurePath: [L1] int __return_main; VAL [\old(__return_main)=2, __return_main=0] [L7] double main__x = 1.0; [L8] double main__x1 = main__x / 1.6; VAL [__return_main=0, main__x=1] [L10] COND FALSE !(main__x1 != main__x) [L19] int __tmp_1; [L20] __tmp_1 = main__x == 0 [L21] int __VERIFIER_assert__cond; [L22] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L23] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L25] __VERIFIER_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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-aa41828 [2018-11-22 22:10:43,455 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-22 22:10:43,457 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-22 22:10:43,466 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-22 22:10:43,467 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-22 22:10:43,467 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-22 22:10:43,469 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-22 22:10:43,470 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-22 22:10:43,471 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-22 22:10:43,472 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-22 22:10:43,473 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-22 22:10:43,473 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-22 22:10:43,474 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-22 22:10:43,475 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-22 22:10:43,476 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-22 22:10:43,477 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-22 22:10:43,477 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-22 22:10:43,479 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-22 22:10:43,481 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-22 22:10:43,482 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-22 22:10:43,483 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-22 22:10:43,484 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-22 22:10:43,486 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-22 22:10:43,486 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-22 22:10:43,486 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-22 22:10:43,487 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-22 22:10:43,488 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-22 22:10:43,488 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-22 22:10:43,490 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-22 22:10:43,491 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-22 22:10:43,491 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-22 22:10:43,491 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-22 22:10:43,491 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-22 22:10:43,492 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-22 22:10:43,492 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-22 22:10:43,494 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-22 22:10:43,494 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-11-22 22:10:43,505 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-22 22:10:43,505 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-22 22:10:43,506 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-22 22:10:43,507 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-22 22:10:43,507 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-22 22:10:43,507 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-22 22:10:43,507 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-22 22:10:43,507 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-22 22:10:43,507 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-22 22:10:43,508 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-22 22:10:43,508 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-22 22:10:43,508 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-22 22:10:43,508 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-22 22:10:43,509 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-22 22:10:43,509 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-22 22:10:43,509 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-22 22:10:43,509 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-22 22:10:43,509 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-22 22:10:43,509 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-22 22:10:43,510 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-22 22:10:43,510 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-22 22:10:43,510 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-22 22:10:43,510 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-22 22:10:43,510 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-22 22:10:43,511 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-22 22:10:43,511 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-22 22:10:43,511 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-22 22:10:43,511 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-22 22:10:43,511 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-22 22:10:43,511 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-22 22:10:43,511 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-22 22:10:43,512 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-11-22 22:10:43,512 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-22 22:10:43,512 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-22 22:10:43,512 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-22 22:10:43,512 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_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/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 -> 14660901cc5c4d61dda44d0e62586d716b569100 [2018-11-22 22:10:43,545 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-22 22:10:43,555 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-22 22:10:43,558 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-22 22:10:43,560 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-22 22:10:43,560 INFO L276 PluginConnector]: CDTParser initialized [2018-11-22 22:10:43,561 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i.p+cfa-reducer.c [2018-11-22 22:10:43,613 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/data/46a262907/2ec459c6cf264687abc10db13c2bdf34/FLAGff2391615 [2018-11-22 22:10:43,946 INFO L307 CDTParser]: Found 1 translation units. [2018-11-22 22:10:43,947 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i.p+cfa-reducer.c [2018-11-22 22:10:43,951 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/data/46a262907/2ec459c6cf264687abc10db13c2bdf34/FLAGff2391615 [2018-11-22 22:10:43,961 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/data/46a262907/2ec459c6cf264687abc10db13c2bdf34 [2018-11-22 22:10:43,964 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-22 22:10:43,965 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-22 22:10:43,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-22 22:10:43,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-22 22:10:43,969 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-22 22:10:43,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:10:43" (1/1) ... [2018-11-22 22:10:43,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59a81458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:43, skipping insertion in model container [2018-11-22 22:10:43,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:10:43" (1/1) ... [2018-11-22 22:10:43,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-22 22:10:43,996 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-22 22:10:44,133 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 22:10:44,139 INFO L191 MainTranslator]: Completed pre-run [2018-11-22 22:10:44,150 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 22:10:44,161 INFO L195 MainTranslator]: Completed translation [2018-11-22 22:10:44,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:44 WrapperNode [2018-11-22 22:10:44,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-22 22:10:44,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-22 22:10:44,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-22 22:10:44,162 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-22 22:10:44,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:44" (1/1) ... [2018-11-22 22:10:44,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:44" (1/1) ... [2018-11-22 22:10:44,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-22 22:10:44,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-22 22:10:44,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-22 22:10:44,177 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-22 22:10:44,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:44" (1/1) ... [2018-11-22 22:10:44,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:44" (1/1) ... [2018-11-22 22:10:44,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:44" (1/1) ... [2018-11-22 22:10:44,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:44" (1/1) ... [2018-11-22 22:10:44,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:44" (1/1) ... [2018-11-22 22:10:44,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:44" (1/1) ... [2018-11-22 22:10:44,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:44" (1/1) ... [2018-11-22 22:10:44,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-22 22:10:44,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-22 22:10:44,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-22 22:10:44,197 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-22 22:10:44,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/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 [2018-11-22 22:10:44,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-22 22:10:44,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-22 22:10:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-22 22:10:44,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-22 22:10:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-22 22:10:44,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-22 22:10:45,152 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-22 22:10:45,153 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-22 22:10:45,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:10:45 BoogieIcfgContainer [2018-11-22 22:10:45,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-22 22:10:45,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-22 22:10:45,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-22 22:10:45,156 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-22 22:10:45,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 10:10:43" (1/3) ... [2018-11-22 22:10:45,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d56c7a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:10:45, skipping insertion in model container [2018-11-22 22:10:45,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:10:44" (2/3) ... [2018-11-22 22:10:45,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d56c7a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:10:45, skipping insertion in model container [2018-11-22 22:10:45,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:10:45" (3/3) ... [2018-11-22 22:10:45,159 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_bad_false-unreach-call.i.p+cfa-reducer.c [2018-11-22 22:10:45,166 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-22 22:10:45,171 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-22 22:10:45,182 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-22 22:10:45,203 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-22 22:10:45,204 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-22 22:10:45,204 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-22 22:10:45,204 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-22 22:10:45,204 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-22 22:10:45,204 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-22 22:10:45,204 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-22 22:10:45,205 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-22 22:10:45,205 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-22 22:10:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-11-22 22:10:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-22 22:10:45,222 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:10:45,223 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:10:45,224 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:10:45,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:10:45,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1301230683, now seen corresponding path program 1 times [2018-11-22 22:10:45,231 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-22 22:10:45,231 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-11-22 22:10:45,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:10:45,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:10:45,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:10:48,460 WARN L180 SmtUtils]: Spent 2.94 s on a formula simplification that was a NOOP. DAG size: 11 [2018-11-22 22:10:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:10:48,472 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-22 22:10:48,485 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 22:10:48,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-22 22:10:48,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-22 22:10:48,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-22 22:10:48,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-22 22:10:48,499 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2018-11-22 22:10:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:10:50,866 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-11-22 22:10:51,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-22 22:10:51,112 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-22 22:10:51,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:10:51,119 INFO L225 Difference]: With dead ends: 22 [2018-11-22 22:10:51,120 INFO L226 Difference]: Without dead ends: 11 [2018-11-22 22:10:51,122 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-22 22:10:51,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-11-22 22:10:51,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-11-22 22:10:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-22 22:10:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-11-22 22:10:51,151 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-11-22 22:10:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:10:51,151 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-11-22 22:10:51,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-22 22:10:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-11-22 22:10:51,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-22 22:10:51,152 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:10:51,152 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:10:51,152 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:10:51,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:10:51,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1683383028, now seen corresponding path program 1 times [2018-11-22 22:10:51,153 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-22 22:10:51,153 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/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 [2018-11-22 22:10:51,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:10:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:10:51,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:10:55,490 WARN L180 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 12 [2018-11-22 22:10:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:10:55,493 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 22:10:59,982 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div roundNearestTiesToEven c_main_~main__x1~0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0))) c_main_~main__x1~0)) is different from false [2018-11-22 22:11:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2018-11-22 22:11:00,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:11:00,607 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:11:00,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:11:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-11-22 22:11:14,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:11:14,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-11-22 22:11:14,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-22 22:11:14,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-22 22:11:14,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=12, Unknown=2, NotChecked=6, Total=30 [2018-11-22 22:11:14,133 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-11-22 22:11:16,370 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (and (not (fp.eq (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse0) c_main_~main__x1~0)) (= (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse0) c_main_~main__x1~0) (not (fp.eq c_main_~main__x1~0 c_main_~main__x~0)))) is different from true [2018-11-22 22:11:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:11:22,710 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2018-11-22 22:11:22,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-22 22:11:22,711 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-11-22 22:11:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:11:22,711 INFO L225 Difference]: With dead ends: 16 [2018-11-22 22:11:22,711 INFO L226 Difference]: Without dead ends: 13 [2018-11-22 22:11:22,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=12, Invalid=13, Unknown=3, NotChecked=14, Total=42 [2018-11-22 22:11:22,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-11-22 22:11:22,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-11-22 22:11:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-11-22 22:11:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-11-22 22:11:22,715 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-11-22 22:11:22,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:11:22,716 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-11-22 22:11:22,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-22 22:11:22,716 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-11-22 22:11:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-22 22:11:22,717 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:11:22,717 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:11:22,717 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:11:22,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:11:22,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1473580076, now seen corresponding path program 2 times [2018-11-22 22:11:22,718 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-22 22:11:22,718 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-11-22 22:11:22,729 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-22 22:11:23,651 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:11:23,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:11:23,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:11:30,420 WARN L180 SmtUtils]: Spent 4.90 s on a formula simplification that was a NOOP. DAG size: 14 [2018-11-22 22:11:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:11:30,432 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 22:11:32,733 WARN L832 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~main__x1~0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven c_main_~main__x1~0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0))) c_main_~main__x1~0))) is different from false [2018-11-22 22:11:34,964 WARN L854 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~main__x1~0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven c_main_~main__x1~0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0))) c_main_~main__x1~0))) is different from true [2018-11-22 22:11:37,388 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from false [2018-11-22 22:11:39,812 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from true [2018-11-22 22:11:42,441 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from false [2018-11-22 22:11:45,075 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from true [2018-11-22 22:11:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2018-11-22 22:11:45,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:11:45,106 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:11:45,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:11:59,591 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:11:59,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-11-22 22:12:02,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:12:02,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2018-11-22 22:12:02,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-22 22:12:02,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-22 22:12:02,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=42, Unknown=6, NotChecked=42, Total=110 [2018-11-22 22:12:02,107 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 11 states. [2018-11-22 22:12:04,760 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0))) (.cse2 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (and (= (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse0) c_main_~main__x1~0) (let ((.cse1 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse0) .cse0))) (or (fp.eq .cse1 .cse2) (not (fp.eq (fp.div roundNearestTiesToEven .cse1 .cse0) .cse1)))) (or (not (fp.eq c_main_~main__x1~0 c_main_~main__x~0)) (fp.eq c_main_~main__x~0 .cse2)))) is different from true [2018-11-22 22:12:07,348 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (and (let ((.cse0 (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) (= (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse1) .cse1) c_main_~main__x1~0))) is different from true [2018-11-22 22:12:09,583 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (and (or (fp.eq c_main_~main__x1~0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse0) c_main_~main__x1~0))) (= (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse0) .cse0) .cse0) c_main_~main__x1~0))) is different from true [2018-11-22 22:12:14,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:12:14,784 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-11-22 22:12:14,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-22 22:12:14,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2018-11-22 22:12:14,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:12:14,785 INFO L225 Difference]: With dead ends: 19 [2018-11-22 22:12:14,785 INFO L226 Difference]: Without dead ends: 15 [2018-11-22 22:12:14,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=30, Invalid=57, Unknown=9, NotChecked=114, Total=210 [2018-11-22 22:12:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-22 22:12:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-22 22:12:14,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-22 22:12:14,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-22 22:12:14,790 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-11-22 22:12:14,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:12:14,791 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-22 22:12:14,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-22 22:12:14,791 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-22 22:12:14,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-22 22:12:14,791 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:12:14,792 INFO L402 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:12:14,792 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:12:14,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:12:14,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1226755252, now seen corresponding path program 3 times [2018-11-22 22:12:14,792 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-22 22:12:14,793 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-11-22 22:12:14,796 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-22 22:12:16,405 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-22 22:12:16,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:12:16,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:12:28,607 WARN L180 SmtUtils]: Spent 2.24 s on a formula simplification that was a NOOP. DAG size: 16 [2018-11-22 22:12:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:12:28,616 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 22:12:34,444 WARN L832 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~main__x1~0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven c_main_~main__x1~0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0))) c_main_~main__x1~0))) is different from false [2018-11-22 22:12:36,669 WARN L854 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~main__x1~0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven c_main_~main__x1~0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0))) c_main_~main__x1~0))) is different from true [2018-11-22 22:12:39,116 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from false [2018-11-22 22:12:41,573 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from true [2018-11-22 22:12:44,253 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from false [2018-11-22 22:12:46,959 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from true [2018-11-22 22:12:49,827 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from false [2018-11-22 22:12:52,693 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from true [2018-11-22 22:12:55,785 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from false [2018-11-22 22:12:58,885 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from true [2018-11-22 22:12:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2018-11-22 22:12:58,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:12:58,924 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:12:58,932 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:13:39,234 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-22 22:13:39,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Forcibly destroying the process [2018-11-22 22:13:40,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:13:40,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2018-11-22 22:13:40,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-22 22:13:40,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-22 22:13:40,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=69, Unknown=13, NotChecked=100, Total=210 [2018-11-22 22:13:40,756 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-11-22 22:13:43,869 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0))) (.cse2 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (and (= (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse0) c_main_~main__x1~0) (let ((.cse1 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse0) .cse0) .cse0) .cse0))) (or (fp.eq .cse1 .cse2) (not (fp.eq (fp.div roundNearestTiesToEven .cse1 .cse0) .cse1)))) (or (not (fp.eq c_main_~main__x1~0 c_main_~main__x~0)) (fp.eq c_main_~main__x~0 .cse2)))) is different from true [2018-11-22 22:13:46,774 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (and (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) (= (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse1) .cse1) c_main_~main__x1~0))) is different from true [2018-11-22 22:13:49,457 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (and (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) (= (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse1) .cse1) .cse1) c_main_~main__x1~0))) is different from true [2018-11-22 22:13:51,926 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (and (let ((.cse0 (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) (= c_main_~main__x1~0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse1) .cse1) .cse1) .cse1)))) is different from true [2018-11-22 22:14:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:14:04,888 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-11-22 22:14:04,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-22 22:14:04,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-11-22 22:14:04,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:14:04,889 INFO L225 Difference]: With dead ends: 21 [2018-11-22 22:14:04,889 INFO L226 Difference]: Without dead ends: 17 [2018-11-22 22:14:04,890 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.7s TimeCoverageRelationStatistics Valid=40, Invalid=89, Unknown=17, NotChecked=234, Total=380 [2018-11-22 22:14:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-22 22:14:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-22 22:14:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-22 22:14:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-11-22 22:14:04,894 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-11-22 22:14:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:14:04,894 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-11-22 22:14:04,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-22 22:14:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-11-22 22:14:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-22 22:14:04,895 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:14:04,895 INFO L402 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:14:04,895 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:14:04,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:14:04,896 INFO L82 PathProgramCache]: Analyzing trace with hash 2088758676, now seen corresponding path program 4 times [2018-11-22 22:14:04,896 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-22 22:14:04,896 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2018-11-22 22:14:04,902 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:14:06,811 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:14:06,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:14:06,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:14:22,955 WARN L180 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 18 [2018-11-22 22:14:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:14:22,958 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 22:14:50,033 WARN L180 SmtUtils]: Spent 2.78 s on a formula simplification that was a NOOP. DAG size: 7 [2018-11-22 22:14:52,460 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from false [2018-11-22 22:14:54,889 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from true [2018-11-22 22:14:57,512 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from false [2018-11-22 22:15:00,138 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from true [2018-11-22 22:15:02,991 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from false [2018-11-22 22:15:05,823 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from true [2018-11-22 22:15:08,883 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from false [2018-11-22 22:15:12,048 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from true [2018-11-22 22:15:15,282 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from false [2018-11-22 22:15:18,559 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from true [2018-11-22 22:15:21,982 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from false [2018-11-22 22:15:25,559 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from true [2018-11-22 22:15:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 27 not checked. [2018-11-22 22:15:25,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:15:25,606 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb7a6b0f-f7c7-40f7-8cdf-0f8dad58daef/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:15:25,613 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:15:49,642 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:15:49,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (10)] Forcibly destroying the process [2018-11-22 22:15:51,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:15:51,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-11-22 22:15:51,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-22 22:15:51,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-22 22:15:51,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=95, Unknown=19, NotChecked=150, Total=306 [2018-11-22 22:15:51,496 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 18 states. [2018-11-22 22:15:54,942 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (and (not (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_main_~main__x1~0 .cse1) .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))) (= (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse1) c_main_~main__x1~0) (not (fp.eq c_main_~main__x1~0 c_main_~main__x~0)))) is different from true [2018-11-22 22:15:56,374 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2018-11-22 22:15:56,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-22 22:15:56,375 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:141) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:845) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:767) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:339) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:382) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:699) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) 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) ... 43 more [2018-11-22 22:15:56,378 INFO L168 Benchmark]: Toolchain (without parser) took 312413.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 949.7 MB in the beginning and 952.8 MB in the end (delta: -3.1 MB). Peak memory consumption was 147.4 MB. Max. memory is 11.5 GB. [2018-11-22 22:15:56,379 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 22:15:56,379 INFO L168 Benchmark]: CACSL2BoogieTranslator took 196.07 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 939.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-22 22:15:56,379 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.30 ms. Allocated memory is still 1.0 GB. Free memory was 939.0 MB in the beginning and 933.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-22 22:15:56,380 INFO L168 Benchmark]: Boogie Preprocessor took 19.08 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 22:15:56,380 INFO L168 Benchmark]: RCFGBuilder took 956.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -194.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2018-11-22 22:15:56,381 INFO L168 Benchmark]: TraceAbstraction took 311223.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 952.8 MB in the end (delta: 175.5 MB). Peak memory consumption was 175.5 MB. Max. memory is 11.5 GB. [2018-11-22 22:15:56,383 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 196.07 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 939.0 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 15.30 ms. Allocated memory is still 1.0 GB. Free memory was 939.0 MB in the beginning and 933.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.08 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 956.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -194.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 311223.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 952.8 MB in the end (delta: 175.5 MB). Peak memory consumption was 175.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...