./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i -s /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d363a30f559764c47bcb73d637f2d7196a1b97b ........................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i -s /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d363a30f559764c47bcb73d637f2d7196a1b97b .............................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 17:50:49,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:50:49,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:50:49,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:50:49,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:50:49,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:50:49,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:50:49,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:50:49,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:50:49,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:50:49,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:50:49,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:50:49,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:50:49,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:50:49,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:50:49,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:50:49,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:50:49,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:50:49,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:50:49,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:50:49,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:50:49,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:50:49,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:50:49,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:50:49,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:50:49,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:50:49,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:50:49,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:50:49,793 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:50:49,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:50:49,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:50:49,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:50:49,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:50:49,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:50:49,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:50:49,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:50:49,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:50:49,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:50:49,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:50:49,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:50:49,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:50:49,797 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 17:50:49,807 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:50:49,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:50:49,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 17:50:49,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 17:50:49,808 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 17:50:49,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:50:49,809 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:50:49,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 17:50:49,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:50:49,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:50:49,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:50:49,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:50:49,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:50:49,809 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:50:49,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:50:49,810 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:50:49,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:50:49,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:50:49,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:50:49,810 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:50:49,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:50:49,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:50:49,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:50:49,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:50:49,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:50:49,811 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 17:50:49,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 17:50:49,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:50:49,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:50:49,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d363a30f559764c47bcb73d637f2d7196a1b97b [2019-12-07 17:50:49,910 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:50:49,918 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:50:49,920 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:50:49,921 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:50:49,921 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:50:49,921 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2019-12-07 17:50:49,958 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/data/0ab1e2e43/ca3e87f2c52f47e6a6ce71f4f7cb8fe4/FLAG56ca760b5 [2019-12-07 17:50:50,410 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:50:50,410 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2019-12-07 17:50:50,414 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/data/0ab1e2e43/ca3e87f2c52f47e6a6ce71f4f7cb8fe4/FLAG56ca760b5 [2019-12-07 17:50:50,422 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/data/0ab1e2e43/ca3e87f2c52f47e6a6ce71f4f7cb8fe4 [2019-12-07 17:50:50,424 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:50:50,425 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:50:50,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:50:50,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:50:50,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:50:50,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:50:50" (1/1) ... [2019-12-07 17:50:50,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a8ebb28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:50, skipping insertion in model container [2019-12-07 17:50:50,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:50:50" (1/1) ... [2019-12-07 17:50:50,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:50:50,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:50:50,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:50:50,586 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:50:50,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:50:50,604 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:50:50,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:50 WrapperNode [2019-12-07 17:50:50,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:50:50,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:50:50,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:50:50,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:50:50,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:50" (1/1) ... [2019-12-07 17:50:50,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:50" (1/1) ... [2019-12-07 17:50:50,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:50:50,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:50:50,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:50:50,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:50:50,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:50" (1/1) ... [2019-12-07 17:50:50,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:50" (1/1) ... [2019-12-07 17:50:50,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:50" (1/1) ... [2019-12-07 17:50:50,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:50" (1/1) ... [2019-12-07 17:50:50,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:50" (1/1) ... [2019-12-07 17:50:50,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:50" (1/1) ... [2019-12-07 17:50:50,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:50" (1/1) ... [2019-12-07 17:50:50,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:50:50,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:50:50,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:50:50,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:50:50,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:50:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:50:50,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:50:50,765 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:50:50,765 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-12-07 17:50:50,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:50:50 BoogieIcfgContainer [2019-12-07 17:50:50,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:50:50,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:50:50,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:50:50,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:50:50,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:50:50" (1/3) ... [2019-12-07 17:50:50,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634d3396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:50:50, skipping insertion in model container [2019-12-07 17:50:50,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:50" (2/3) ... [2019-12-07 17:50:50,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634d3396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:50:50, skipping insertion in model container [2019-12-07 17:50:50,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:50:50" (3/3) ... [2019-12-07 17:50:50,771 INFO L109 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i [2019-12-07 17:50:50,777 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:50:50,780 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:50:50,787 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:50:50,801 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:50:50,802 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:50:50,802 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:50:50,802 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:50:50,802 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:50:50,802 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:50:50,802 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:50:50,802 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:50:50,811 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-12-07 17:50:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 17:50:50,814 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:50:50,814 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 17:50:50,814 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:50:50,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:50:50,818 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-12-07 17:50:50,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:50:50,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753284231] [2019-12-07 17:50:50,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:50:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:50:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:50:50,893 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 17:50:50,893 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 17:50:50,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 05:50:50 BoogieIcfgContainer [2019-12-07 17:50:50,903 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 17:50:50,903 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 17:50:50,903 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 17:50:50,904 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 17:50:50,904 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:50:50" (3/4) ... [2019-12-07 17:50:50,906 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 17:50:50,906 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 17:50:50,908 INFO L168 Benchmark]: Toolchain (without parser) took 482.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 83.4 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -104.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:50:50,908 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:50:50,909 INFO L168 Benchmark]: CACSL2BoogieTranslator took 179.58 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 83.4 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -132.1 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. [2019-12-07 17:50:50,909 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.58 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:50:50,909 INFO L168 Benchmark]: Boogie Preprocessor took 13.05 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:50:50,910 INFO L168 Benchmark]: RCFGBuilder took 127.23 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 11.5 GB. [2019-12-07 17:50:50,910 INFO L168 Benchmark]: TraceAbstraction took 136.50 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-12-07 17:50:50,911 INFO L168 Benchmark]: Witness Printer took 2.91 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:50:50,913 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 179.58 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 83.4 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -132.1 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.58 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.05 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 127.23 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 136.50 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Witness Printer took 2.91 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 2]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 18, overapproximation of someBinaryArithmeticDOUBLEoperation at line 10. Possible FailurePath: [L9] double x = 1.0; [L10] double x1 = x/1.6; [L12] COND FALSE !(x1 != x) [L2] COND TRUE !(cond) [L2] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.0s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: 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 0.1.25-f470102 [2019-12-07 17:50:52,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:50:52,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:50:52,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:50:52,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:50:52,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:50:52,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:50:52,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:50:52,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:50:52,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:50:52,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:50:52,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:50:52,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:50:52,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:50:52,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:50:52,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:50:52,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:50:52,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:50:52,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:50:52,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:50:52,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:50:52,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:50:52,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:50:52,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:50:52,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:50:52,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:50:52,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:50:52,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:50:52,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:50:52,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:50:52,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:50:52,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:50:52,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:50:52,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:50:52,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:50:52,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:50:52,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:50:52,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:50:52,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:50:52,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:50:52,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:50:52,306 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-12-07 17:50:52,319 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:50:52,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:50:52,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 17:50:52,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 17:50:52,320 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 17:50:52,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:50:52,321 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:50:52,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:50:52,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:50:52,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:50:52,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:50:52,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:50:52,322 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 17:50:52,322 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 17:50:52,322 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:50:52,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:50:52,323 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:50:52,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:50:52,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:50:52,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:50:52,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:50:52,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:50:52,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:50:52,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:50:52,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:50:52,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:50:52,325 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-12-07 17:50:52,325 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 17:50:52,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:50:52,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:50:52,325 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 17:50:52,326 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d363a30f559764c47bcb73d637f2d7196a1b97b [2019-12-07 17:50:52,500 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:50:52,511 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:50:52,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:50:52,515 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:50:52,516 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:50:52,516 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2019-12-07 17:50:52,564 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/data/8ff3d3ed9/de24f755bdca466a92166f09788fe6ec/FLAGb2f3c194f [2019-12-07 17:50:52,881 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:50:52,881 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2019-12-07 17:50:52,885 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/data/8ff3d3ed9/de24f755bdca466a92166f09788fe6ec/FLAGb2f3c194f [2019-12-07 17:50:52,894 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/data/8ff3d3ed9/de24f755bdca466a92166f09788fe6ec [2019-12-07 17:50:52,896 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:50:52,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:50:52,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:50:52,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:50:52,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:50:52,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:50:52" (1/1) ... [2019-12-07 17:50:52,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23cf13fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:52, skipping insertion in model container [2019-12-07 17:50:52,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:50:52" (1/1) ... [2019-12-07 17:50:52,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:50:52,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:50:53,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:50:53,018 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:50:53,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:50:53,037 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:50:53,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:53 WrapperNode [2019-12-07 17:50:53,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:50:53,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:50:53,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:50:53,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:50:53,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:53" (1/1) ... [2019-12-07 17:50:53,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:53" (1/1) ... [2019-12-07 17:50:53,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:50:53,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:50:53,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:50:53,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:50:53,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:53" (1/1) ... [2019-12-07 17:50:53,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:53" (1/1) ... [2019-12-07 17:50:53,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:53" (1/1) ... [2019-12-07 17:50:53,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:53" (1/1) ... [2019-12-07 17:50:53,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:53" (1/1) ... [2019-12-07 17:50:53,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:53" (1/1) ... [2019-12-07 17:50:53,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:53" (1/1) ... [2019-12-07 17:50:53,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:50:53,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:50:53,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:50:53,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:50:53,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:50:53,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:50:53,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:50:57,530 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:50:57,531 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-12-07 17:50:57,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:50:57 BoogieIcfgContainer [2019-12-07 17:50:57,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:50:57,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:50:57,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:50:57,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:50:57,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:50:52" (1/3) ... [2019-12-07 17:50:57,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ec76c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:50:57, skipping insertion in model container [2019-12-07 17:50:57,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:50:53" (2/3) ... [2019-12-07 17:50:57,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ec76c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:50:57, skipping insertion in model container [2019-12-07 17:50:57,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:50:57" (3/3) ... [2019-12-07 17:50:57,537 INFO L109 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i [2019-12-07 17:50:57,543 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:50:57,547 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:50:57,555 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:50:57,569 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:50:57,569 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:50:57,570 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:50:57,570 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:50:57,570 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:50:57,570 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:50:57,570 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:50:57,570 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:50:57,579 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-12-07 17:50:57,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 17:50:57,582 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:50:57,583 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 17:50:57,583 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:50:57,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:50:57,587 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2019-12-07 17:50:57,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:50:57,594 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741138086] [2019-12-07 17:50:57,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-12-07 17:50:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:50:58,349 INFO L264 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 17:50:58,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:51:01,295 WARN L192 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 11 [2019-12-07 17:51:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:51:01,299 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:51:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:51:05,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741138086] [2019-12-07 17:51:05,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:51:05,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-12-07 17:51:05,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502413243] [2019-12-07 17:51:05,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 17:51:05,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:51:05,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 17:51:05,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 17:51:05,876 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 5 states. [2019-12-07 17:51:10,756 WARN L192 SmtUtils]: Spent 3.17 s on a formula simplification that was a NOOP. DAG size: 13 [2019-12-07 17:51:22,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:51:22,757 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2019-12-07 17:51:22,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 17:51:22,759 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-12-07 17:51:22,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:51:22,766 INFO L225 Difference]: With dead ends: 21 [2019-12-07 17:51:22,766 INFO L226 Difference]: Without dead ends: 9 [2019-12-07 17:51:22,769 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-07 17:51:22,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-12-07 17:51:22,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-12-07 17:51:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 17:51:22,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-12-07 17:51:22,791 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-12-07 17:51:22,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:51:22,791 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-12-07 17:51:22,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 17:51:22,792 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-12-07 17:51:22,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 17:51:22,792 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:51:22,792 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-07 17:51:22,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 17:51:22,993 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:51:22,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:51:22,993 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 1 times [2019-12-07 17:51:22,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:51:22,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410095847] [2019-12-07 17:51:22,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-12-07 17:51:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:51:25,264 WARN L262 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 17:51:25,265 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:51:27,672 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~x1~0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2019-12-07 17:51:30,147 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~x1~0 (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2019-12-07 17:51:36,805 WARN L192 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 13 [2019-12-07 17:51:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-12-07 17:51:36,809 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:51:52,884 WARN L192 SmtUtils]: Spent 3.07 s on a formula simplification that was a NOOP. DAG size: 7 [2019-12-07 17:51:55,394 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from false [2019-12-07 17:51:57,909 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2019-12-07 17:52:00,631 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from false [2019-12-07 17:52:03,389 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2019-12-07 17:52:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-12-07 17:52:03,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410095847] [2019-12-07 17:52:03,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:52:03,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-12-07 17:52:03,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256387124] [2019-12-07 17:52:03,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 17:52:03,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:52:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 17:52:03,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=19, Unknown=8, NotChecked=44, Total=90 [2019-12-07 17:52:03,393 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 10 states. [2019-12-07 17:52:06,855 WARN L860 $PredicateComparison]: unable to prove that (and (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2019-12-07 17:52:09,325 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= c_ULTIMATE.start_main_~x1~0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)) (not (let ((.cse1 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse0))) (fp.eq (fp.div c_currentRoundingMode .cse1 .cse0) .cse1))) (= c_currentRoundingMode roundNearestTiesToEven))) is different from false [2019-12-07 17:52:11,849 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= c_ULTIMATE.start_main_~x1~0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)) (not (let ((.cse1 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse0))) (fp.eq (fp.div c_currentRoundingMode .cse1 .cse0) .cse1))) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2019-12-07 17:52:16,283 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= c_ULTIMATE.start_main_~x1~0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0)) (not (fp.eq (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse0) c_ULTIMATE.start_main_~x1~0)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2019-12-07 17:52:27,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:52:27,546 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-12-07 17:52:27,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 17:52:27,802 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2019-12-07 17:52:27,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:52:27,803 INFO L225 Difference]: With dead ends: 15 [2019-12-07 17:52:27,803 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 17:52:27,804 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.5s TimeCoverageRelationStatistics Valid=25, Invalid=21, Unknown=12, NotChecked=98, Total=156 [2019-12-07 17:52:27,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 17:52:27,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 17:52:27,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 17:52:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-12-07 17:52:27,807 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2019-12-07 17:52:27,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:52:27,807 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-12-07 17:52:27,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 17:52:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-12-07 17:52:27,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 17:52:27,808 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:52:27,808 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-07 17:52:28,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 17:52:28,010 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:52:28,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:52:28,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2019-12-07 17:52:28,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:52:28,012 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783898487] [2019-12-07 17:52:28,013 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-12-07 17:52:31,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:52:31,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:52:31,837 WARN L262 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 17:52:31,838 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:52:34,881 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~x1~0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2019-12-07 17:52:37,377 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~x1~0 (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2019-12-07 17:52:41,422 WARN L860 $PredicateComparison]: unable to prove that (and (= (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0)) c_ULTIMATE.start_main_~x1~0) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2019-12-07 17:52:44,338 WARN L860 $PredicateComparison]: unable to prove that (and (= (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0)) c_ULTIMATE.start_main_~x1~0) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2019-12-07 17:52:47,531 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= c_ULTIMATE.start_main_~x1~0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x~0 .cse0)) (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0) c_ULTIMATE.start_main_~x~0) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2019-12-07 17:52:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2019-12-07 17:52:47,534 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:52:49,847 WARN L838 $PredicateComparison]: unable to prove that (or (fp.eq c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) c_ULTIMATE.start_main_~x1~0))) is different from false [2019-12-07 17:52:53,425 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from false [2019-12-07 17:52:55,951 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from true [2019-12-07 17:52:58,724 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2019-12-07 17:53:01,480 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2019-12-07 17:53:04,525 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from false [2019-12-07 17:53:07,571 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from true [2019-12-07 17:53:11,084 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from false [2019-12-07 17:53:14,433 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from true [2019-12-07 17:53:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2019-12-07 17:53:14,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783898487] [2019-12-07 17:53:14,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:53:14,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2019-12-07 17:53:14,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045291543] [2019-12-07 17:53:14,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 17:53:14,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:53:14,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 17:53:14,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=26, Unknown=14, NotChecked=170, Total=240 [2019-12-07 17:53:14,437 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 16 states. [2019-12-07 17:53:17,751 WARN L860 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from true [2019-12-07 17:53:21,161 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= c_ULTIMATE.start_main_~x1~0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)) (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse1 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse0) .cse0) .cse0))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse1 .cse0) .cse1)) (fp.eq .cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from false [2019-12-07 17:53:24,198 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= c_ULTIMATE.start_main_~x1~0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)) (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse1 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse0) .cse0) .cse0))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse1 .cse0) .cse1)) (fp.eq .cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from true [2019-12-07 17:53:27,621 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) (= c_ULTIMATE.start_main_~x1~0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2019-12-07 17:53:31,045 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (let ((.cse0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))) (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) c_ULTIMATE.start_main_~x1~0) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2019-12-07 17:53:35,490 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0) c_ULTIMATE.start_main_~x1~0) (or (fp.eq c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse0) c_ULTIMATE.start_main_~x1~0))) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2019-12-07 17:54:10,474 WARN L192 SmtUtils]: Spent 28.74 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2019-12-07 17:54:15,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:54:15,920 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-12-07 17:54:15,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 17:54:15,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 10 [2019-12-07 17:54:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:54:15,921 INFO L225 Difference]: With dead ends: 19 [2019-12-07 17:54:15,922 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 17:54:15,922 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 15 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.1s TimeCoverageRelationStatistics Valid=63, Invalid=66, Unknown=21, NotChecked=450, Total=600 [2019-12-07 17:54:15,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 17:54:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 17:54:15,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 17:54:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-12-07 17:54:15,925 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2019-12-07 17:54:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:54:15,926 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-12-07 17:54:15,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 17:54:15,926 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-12-07 17:54:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 17:54:15,926 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:54:15,926 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-07 17:54:16,127 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-12-07 17:54:16,128 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:54:16,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:54:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 3 times [2019-12-07 17:54:16,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:54:16,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664306404] [2019-12-07 17:54:16,131 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-12-07 17:54:22,315 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 17:54:22,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:54:22,821 WARN L262 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-07 17:54:22,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:54:25,293 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~x1~0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2019-12-07 17:54:28,149 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~x1~0 (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2019-12-07 17:54:30,405 WARN L860 $PredicateComparison]: unable to prove that (and (= (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0)) c_ULTIMATE.start_main_~x1~0) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2019-12-07 17:54:33,571 WARN L860 $PredicateComparison]: unable to prove that (and (= (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0)) c_ULTIMATE.start_main_~x1~0) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2019-12-07 17:54:35,195 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-12-07 17:54:35,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664306404] [2019-12-07 17:54:35,196 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2019-12-07 17:54:35,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1688915034] [2019-12-07 17:54:35,196 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 17:54:52,961 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 17:54:52,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:54:52,980 WARN L262 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-07 17:54:52,981 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:54:52,985 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@364c4855 [2019-12-07 17:54:52,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148101776] [2019-12-07 17:54:52,985 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55820040-834b-4eaf-9d2e-4aa266d79906/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:15,265 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 18:02:15,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:02:16,851 WARN L262 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 18:02:16,852 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:02:16,854 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@364c4855 [2019-12-07 18:02:16,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:02:16,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2019-12-07 18:02:16,855 ERROR L206 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2019-12-07 18:02:16,855 INFO L475 BasicCegarLoop]: Counterexample might be feasible [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forcibly destroying the process [2019-12-07 18:02:17,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:17,472 WARN L229 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2019-12-07 18:02:17,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:02:17 BoogieIcfgContainer [2019-12-07 18:02:17,473 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:02:17,473 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:02:17,473 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:02:17,474 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:02:17,474 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:50:57" (3/4) ... [2019-12-07 18:02:17,477 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 18:02:17,477 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:02:17,479 INFO L168 Benchmark]: Toolchain (without parser) took 684581.55 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 70.8 MB). Free memory was 953.7 MB in the beginning and 912.3 MB in the end (delta: 41.5 MB). Peak memory consumption was 112.2 MB. Max. memory is 11.5 GB. [2019-12-07 18:02:17,479 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:02:17,479 INFO L168 Benchmark]: CACSL2BoogieTranslator took 139.90 ms. Allocated memory is still 1.0 GB. Free memory was 953.7 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-12-07 18:02:17,480 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.23 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 70.8 MB). Free memory was 943.0 MB in the beginning and 1.1 GB in the end (delta: -120.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-12-07 18:02:17,481 INFO L168 Benchmark]: Boogie Preprocessor took 18.06 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 11.5 GB. [2019-12-07 18:02:17,481 INFO L168 Benchmark]: RCFGBuilder took 4422.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. [2019-12-07 18:02:17,482 INFO L168 Benchmark]: TraceAbstraction took 679940.52 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 912.3 MB in the end (delta: 124.1 MB). Peak memory consumption was 124.1 MB. Max. memory is 11.5 GB. [2019-12-07 18:02:17,482 INFO L168 Benchmark]: Witness Printer took 4.02 ms. Allocated memory is still 1.1 GB. Free memory is still 912.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:02:17,485 INFO L335 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 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 139.90 ms. Allocated memory is still 1.0 GB. Free memory was 953.7 MB in the beginning and 943.0 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 53.23 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 70.8 MB). Free memory was 943.0 MB in the beginning and 1.1 GB in the end (delta: -120.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.06 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 4422.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 679940.52 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 912.3 MB in the end (delta: 124.1 MB). Peak memory consumption was 124.1 MB. Max. memory is 11.5 GB. * Witness Printer took 4.02 ms. Allocated memory is still 1.1 GB. Free memory is still 912.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 2]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L9] double x = 1.0; [L10] double x1 = x/1.6; [L12] COND TRUE x1 != x [L14] x = x1 [L15] x1 = x/1.6 [L12] COND TRUE x1 != x [L14] x = x1 [L15] x1 = x/1.6 [L12] COND TRUE x1 != x [L14] x = x1 [L15] x1 = x/1.6 [L12] COND TRUE x1 != x [L14] x = x1 [L15] x1 = x/1.6 [L12] COND TRUE x1 != x [L14] x = x1 [L15] x1 = x/1.6 [L12] COND TRUE x1 != x [L14] x = x1 [L15] x1 = x/1.6 [L12] COND FALSE !(x1 != x) [L2] COND TRUE !(cond) [L2] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Result: UNKNOWN, OverallTime: 679.8s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 102.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 16 SDtfs, 19 SDslu, 28 SDs, 0 SdLazy, 29 SolverSat, 6 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 25.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 22 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 163.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 6.2s SatisfiabilityAnalysisTime, 88.8s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 4477 SizeOfPredicates, 13 NumberOfNonLiveVariables, 48 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 0/26 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...