./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8571d6e044ba86c3b82c24f6ff451bf497f2aedf ............................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8571d6e044ba86c3b82c24f6ff451bf497f2aedf .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 12:40:13,768 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 12:40:13,769 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 12:40:13,776 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 12:40:13,776 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 12:40:13,777 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 12:40:13,777 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 12:40:13,778 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 12:40:13,780 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 12:40:13,780 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 12:40:13,781 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 12:40:13,781 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 12:40:13,782 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 12:40:13,782 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 12:40:13,783 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 12:40:13,784 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 12:40:13,784 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 12:40:13,785 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 12:40:13,787 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 12:40:13,788 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 12:40:13,789 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 12:40:13,790 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 12:40:13,791 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 12:40:13,791 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 12:40:13,792 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 12:40:13,792 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 12:40:13,793 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 12:40:13,794 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 12:40:13,794 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 12:40:13,795 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 12:40:13,795 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 12:40:13,796 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 12:40:13,796 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 12:40:13,796 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 12:40:13,797 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 12:40:13,797 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 12:40:13,797 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 12:40:13,810 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 12:40:13,810 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 12:40:13,811 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 12:40:13,811 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 12:40:13,811 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 12:40:13,812 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 12:40:13,812 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 12:40:13,812 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 12:40:13,812 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 12:40:13,812 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 12:40:13,812 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 12:40:13,812 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 12:40:13,813 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 12:40:13,813 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 12:40:13,813 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 12:40:13,813 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 12:40:13,813 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 12:40:13,813 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 12:40:13,814 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 12:40:13,814 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 12:40:13,814 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 12:40:13,814 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 12:40:13,814 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 12:40:13,814 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 12:40:13,814 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 12:40:13,815 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 12:40:13,815 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 12:40:13,815 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 12:40:13,815 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 12:40:13,815 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8571d6e044ba86c3b82c24f6ff451bf497f2aedf [2018-11-10 12:40:13,837 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 12:40:13,845 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 12:40:13,847 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 12:40:13,848 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 12:40:13,848 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 12:40:13,849 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i [2018-11-10 12:40:13,885 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/data/282488f07/f94e3eaa280f45b69e3240ac00c3aee4/FLAGcbde5fe2c [2018-11-10 12:40:14,268 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 12:40:14,268 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i [2018-11-10 12:40:14,272 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/data/282488f07/f94e3eaa280f45b69e3240ac00c3aee4/FLAGcbde5fe2c [2018-11-10 12:40:14,284 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/data/282488f07/f94e3eaa280f45b69e3240ac00c3aee4 [2018-11-10 12:40:14,286 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 12:40:14,287 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 12:40:14,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 12:40:14,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 12:40:14,291 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 12:40:14,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:40:14" (1/1) ... [2018-11-10 12:40:14,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ac897aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:14, skipping insertion in model container [2018-11-10 12:40:14,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:40:14" (1/1) ... [2018-11-10 12:40:14,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 12:40:14,310 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 12:40:14,399 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:40:14,402 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 12:40:14,410 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:40:14,418 INFO L193 MainTranslator]: Completed translation [2018-11-10 12:40:14,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:14 WrapperNode [2018-11-10 12:40:14,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 12:40:14,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 12:40:14,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 12:40:14,419 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 12:40:14,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:14" (1/1) ... [2018-11-10 12:40:14,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:14" (1/1) ... [2018-11-10 12:40:14,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:14" (1/1) ... [2018-11-10 12:40:14,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:14" (1/1) ... [2018-11-10 12:40:14,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:14" (1/1) ... [2018-11-10 12:40:14,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:14" (1/1) ... [2018-11-10 12:40:14,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:14" (1/1) ... [2018-11-10 12:40:14,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 12:40:14,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 12:40:14,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 12:40:14,438 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 12:40:14,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 12:40:14,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 12:40:14,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 12:40:14,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 12:40:14,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 12:40:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 12:40:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 12:40:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 12:40:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 12:40:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 12:40:14,615 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 12:40:14,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:40:14 BoogieIcfgContainer [2018-11-10 12:40:14,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 12:40:14,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 12:40:14,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 12:40:14,618 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 12:40:14,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 12:40:14" (1/3) ... [2018-11-10 12:40:14,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb93e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:40:14, skipping insertion in model container [2018-11-10 12:40:14,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:14" (2/3) ... [2018-11-10 12:40:14,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb93e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:40:14, skipping insertion in model container [2018-11-10 12:40:14,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:40:14" (3/3) ... [2018-11-10 12:40:14,620 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_true-unreach-call.i [2018-11-10 12:40:14,628 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 12:40:14,634 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 12:40:14,649 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 12:40:14,676 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 12:40:14,677 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 12:40:14,677 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 12:40:14,677 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 12:40:14,677 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 12:40:14,677 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 12:40:14,677 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 12:40:14,677 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 12:40:14,677 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 12:40:14,692 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-10 12:40:14,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 12:40:14,697 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:14,697 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:14,699 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:14,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:14,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-11-10 12:40:14,706 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:14,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:14,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:14,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:40:14,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:40:14,787 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 12:40:14,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 12:40:14,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 12:40:14,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 12:40:14,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 12:40:14,800 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-10 12:40:14,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:14,816 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-10 12:40:14,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 12:40:14,817 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-10 12:40:14,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:14,823 INFO L225 Difference]: With dead ends: 31 [2018-11-10 12:40:14,823 INFO L226 Difference]: Without dead ends: 12 [2018-11-10 12:40:14,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 12:40:14,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-10 12:40:14,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-10 12:40:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-10 12:40:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-10 12:40:14,848 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-10 12:40:14,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:14,849 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-10 12:40:14,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 12:40:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-10 12:40:14,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 12:40:14,849 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:14,849 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:14,849 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:14,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:14,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-11-10 12:40:14,850 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:40:14,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:40:14,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:14,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:40:14,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:40:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:40:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:40:14,876 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 12:40:14,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 12:40:14 BoogieIcfgContainer [2018-11-10 12:40:14,889 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 12:40:14,889 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 12:40:14,889 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 12:40:14,889 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 12:40:14,889 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:40:14" (3/4) ... [2018-11-10 12:40:14,892 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-10 12:40:14,892 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 12:40:14,892 INFO L168 Benchmark]: Toolchain (without parser) took 606.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 960.3 MB in the beginning and 1.1 GB in the end (delta: -151.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:40:14,894 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:40:14,894 INFO L168 Benchmark]: CACSL2BoogieTranslator took 131.27 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 12:40:14,895 INFO L168 Benchmark]: Boogie Preprocessor took 18.42 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:40:14,895 INFO L168 Benchmark]: RCFGBuilder took 177.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -189.6 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2018-11-10 12:40:14,896 INFO L168 Benchmark]: TraceAbstraction took 272.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. [2018-11-10 12:40:14,896 INFO L168 Benchmark]: Witness Printer took 3.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-10 12:40:14,899 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 131.27 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.42 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 177.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -189.6 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 272.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. * Witness Printer took 3.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 2]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 12, overapproximation of someBinaryArithmeticDOUBLEoperation at line 10. Possible FailurePath: [L9] double x = 1.0; [L10] double x1 = x/2.5; VAL [x=1] [L12] COND FALSE !(x1 != x) VAL [x=1] [L18] CALL __VERIFIER_assert(x == 0) VAL [\old(cond)=0] [L2] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L2] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 0.2s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-1dbac8b [2018-11-10 12:40:16,338 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 12:40:16,339 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 12:40:16,348 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 12:40:16,348 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 12:40:16,349 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 12:40:16,350 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 12:40:16,351 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 12:40:16,352 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 12:40:16,353 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 12:40:16,353 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 12:40:16,353 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 12:40:16,354 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 12:40:16,355 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 12:40:16,356 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 12:40:16,356 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 12:40:16,357 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 12:40:16,358 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 12:40:16,359 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 12:40:16,360 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 12:40:16,361 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 12:40:16,362 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 12:40:16,364 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 12:40:16,364 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 12:40:16,364 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 12:40:16,365 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 12:40:16,365 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 12:40:16,366 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 12:40:16,367 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 12:40:16,367 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 12:40:16,368 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 12:40:16,368 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 12:40:16,368 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 12:40:16,368 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 12:40:16,369 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 12:40:16,369 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 12:40:16,369 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-11-10 12:40:16,380 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 12:40:16,380 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 12:40:16,381 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 12:40:16,381 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 12:40:16,381 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 12:40:16,382 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 12:40:16,382 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 12:40:16,382 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 12:40:16,382 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 12:40:16,382 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 12:40:16,382 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 12:40:16,382 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 12:40:16,382 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 12:40:16,383 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 12:40:16,383 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-10 12:40:16,383 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-10 12:40:16,383 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 12:40:16,383 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 12:40:16,383 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 12:40:16,383 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 12:40:16,384 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 12:40:16,384 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 12:40:16,384 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 12:40:16,384 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 12:40:16,384 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 12:40:16,384 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 12:40:16,384 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 12:40:16,385 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-11-10 12:40:16,385 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 12:40:16,385 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-10 12:40:16,385 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-10 12:40:16,385 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8571d6e044ba86c3b82c24f6ff451bf497f2aedf [2018-11-10 12:40:16,416 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 12:40:16,425 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 12:40:16,427 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 12:40:16,428 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 12:40:16,429 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 12:40:16,429 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i [2018-11-10 12:40:16,470 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/data/c05ef39d2/970358fd5a5544b2b984c6b808f8dda4/FLAG70538a321 [2018-11-10 12:40:16,863 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 12:40:16,863 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i [2018-11-10 12:40:16,867 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/data/c05ef39d2/970358fd5a5544b2b984c6b808f8dda4/FLAG70538a321 [2018-11-10 12:40:16,876 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/data/c05ef39d2/970358fd5a5544b2b984c6b808f8dda4 [2018-11-10 12:40:16,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 12:40:16,879 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 12:40:16,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 12:40:16,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 12:40:16,882 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 12:40:16,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:40:16" (1/1) ... [2018-11-10 12:40:16,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ea5632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:16, skipping insertion in model container [2018-11-10 12:40:16,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:40:16" (1/1) ... [2018-11-10 12:40:16,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 12:40:16,904 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 12:40:17,015 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:40:17,020 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 12:40:17,030 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:40:17,038 INFO L193 MainTranslator]: Completed translation [2018-11-10 12:40:17,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:17 WrapperNode [2018-11-10 12:40:17,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 12:40:17,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 12:40:17,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 12:40:17,040 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 12:40:17,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:17" (1/1) ... [2018-11-10 12:40:17,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:17" (1/1) ... [2018-11-10 12:40:17,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:17" (1/1) ... [2018-11-10 12:40:17,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:17" (1/1) ... [2018-11-10 12:40:17,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:17" (1/1) ... [2018-11-10 12:40:17,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:17" (1/1) ... [2018-11-10 12:40:17,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:17" (1/1) ... [2018-11-10 12:40:17,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 12:40:17,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 12:40:17,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 12:40:17,060 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 12:40:17,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 12:40:17,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 12:40:17,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 12:40:17,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 12:40:17,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 12:40:17,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 12:40:17,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 12:40:17,099 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 12:40:17,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 12:40:17,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 12:40:17,899 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 12:40:17,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:40:17 BoogieIcfgContainer [2018-11-10 12:40:17,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 12:40:17,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 12:40:17,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 12:40:17,903 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 12:40:17,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 12:40:16" (1/3) ... [2018-11-10 12:40:17,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb38f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:40:17, skipping insertion in model container [2018-11-10 12:40:17,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:40:17" (2/3) ... [2018-11-10 12:40:17,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb38f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:40:17, skipping insertion in model container [2018-11-10 12:40:17,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:40:17" (3/3) ... [2018-11-10 12:40:17,906 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_true-unreach-call.i [2018-11-10 12:40:17,914 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 12:40:17,920 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 12:40:17,931 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 12:40:17,949 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 12:40:17,949 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 12:40:17,949 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 12:40:17,949 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 12:40:17,949 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 12:40:17,949 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 12:40:17,949 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 12:40:17,950 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 12:40:17,950 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 12:40:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-10 12:40:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 12:40:17,963 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:17,964 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:17,966 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:17,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:17,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-11-10 12:40:17,974 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 12:40:17,975 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-11-10 12:40:17,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:40:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:18,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:40:18,155 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 12:40:18,165 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 12:40:18,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 12:40:18,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 12:40:18,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 12:40:18,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 12:40:18,180 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-10 12:40:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:18,198 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-10 12:40:18,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 12:40:18,200 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-10 12:40:18,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:18,206 INFO L225 Difference]: With dead ends: 31 [2018-11-10 12:40:18,207 INFO L226 Difference]: Without dead ends: 12 [2018-11-10 12:40:18,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 12:40:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-10 12:40:18,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-10 12:40:18,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-10 12:40:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-10 12:40:18,232 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-10 12:40:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:18,232 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-10 12:40:18,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 12:40:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-10 12:40:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 12:40:18,232 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:18,233 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:18,233 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:18,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:18,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-11-10 12:40:18,233 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 12:40:18,234 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-11-10 12:40:18,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:40:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:18,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:20,971 WARN L179 SmtUtils]: Spent 2.56 s on a formula simplification that was a NOOP. DAG size: 11 [2018-11-10 12:40:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:40:20,979 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 12:40:20,987 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 12:40:20,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 12:40:20,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 12:40:20,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 12:40:20,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 12:40:20,989 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-11-10 12:40:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:22,116 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-10 12:40:22,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 12:40:22,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-10 12:40:22,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:22,714 INFO L225 Difference]: With dead ends: 19 [2018-11-10 12:40:22,714 INFO L226 Difference]: Without dead ends: 14 [2018-11-10 12:40:22,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 12:40:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-10 12:40:22,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-10 12:40:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-10 12:40:22,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-10 12:40:22,718 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-11-10 12:40:22,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:22,718 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-10 12:40:22,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 12:40:22,718 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-10 12:40:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 12:40:22,719 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:22,719 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:22,719 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:22,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:22,720 INFO L82 PathProgramCache]: Analyzing trace with hash -661808769, now seen corresponding path program 1 times [2018-11-10 12:40:22,720 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 12:40:22,720 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-11-10 12:40:22,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:40:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:40:23,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:28,202 WARN L179 SmtUtils]: Spent 4.36 s on a formula simplification that was a NOOP. DAG size: 12 [2018-11-10 12:40:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:40:28,206 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 12:40:39,031 WARN L179 SmtUtils]: Spent 2.68 s on a formula simplification that was a NOOP. DAG size: 7 [2018-11-10 12:40:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:40:39,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:40:39,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-11-10 12:40:39,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 12:40:39,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 12:40:39,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=16, Unknown=2, NotChecked=0, Total=30 [2018-11-10 12:40:39,054 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-11-10 12:40:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:40:48,554 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-11-10 12:40:48,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 12:40:48,925 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-11-10 12:40:48,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:40:48,926 INFO L225 Difference]: With dead ends: 23 [2018-11-10 12:40:48,926 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 12:40:48,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=17, Invalid=23, Unknown=2, NotChecked=0, Total=42 [2018-11-10 12:40:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 12:40:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 12:40:48,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 12:40:48,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-10 12:40:48,930 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 13 [2018-11-10 12:40:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:40:48,930 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-10 12:40:48,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 12:40:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-10 12:40:48,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-10 12:40:48,931 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:40:48,931 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:40:48,931 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:40:48,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:40:48,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2058417419, now seen corresponding path program 2 times [2018-11-10 12:40:48,931 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 12:40:48,931 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-11-10 12:40:48,935 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 12:40:49,494 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 12:40:49,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:40:49,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:40:56,720 WARN L179 SmtUtils]: Spent 2.62 s on a formula simplification that was a NOOP. DAG size: 14 [2018-11-10 12:40:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:40:56,725 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 12:41:06,559 WARN L854 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x1~0)) (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32)))) is different from true [2018-11-10 12:41:08,949 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from false [2018-11-10 12:41:11,325 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from true [2018-11-10 12:41:13,883 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))) is different from false [2018-11-10 12:41:16,439 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))) is different from true [2018-11-10 12:41:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2018-11-10 12:41:16,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:41:16,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2018-11-10 12:41:16,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 12:41:16,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 12:41:16,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=71, Unknown=6, NotChecked=54, Total=156 [2018-11-10 12:41:16,476 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 13 states. [2018-11-10 12:41:19,072 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (_ bv0 32))) (.cse0 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (and (= c_main_~x1~0 (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0)) (or (fp.eq c_main_~x~0 .cse1) (not (fp.eq c_main_~x1~0 c_main_~x~0))) (let ((.cse2 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse0) .cse0))) (or (not (fp.eq (fp.div RNE .cse2 .cse0) .cse2)) (fp.eq .cse2 .cse1))))) is different from true [2018-11-10 12:41:21,467 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (and (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1)))) is different from true [2018-11-10 12:41:23,673 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (and (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0) .cse0)) (or (not (fp.eq (fp.div RNE c_main_~x1~0 .cse0) c_main_~x1~0)) (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32)))))) is different from true [2018-11-10 12:41:36,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:41:36,932 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-11-10 12:41:36,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 12:41:36,932 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2018-11-10 12:41:36,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:41:36,933 INFO L225 Difference]: With dead ends: 30 [2018-11-10 12:41:36,933 INFO L226 Difference]: Without dead ends: 22 [2018-11-10 12:41:36,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=35, Invalid=90, Unknown=9, NotChecked=138, Total=272 [2018-11-10 12:41:36,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-10 12:41:36,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-10 12:41:36,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-10 12:41:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-11-10 12:41:36,938 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 17 [2018-11-10 12:41:36,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:41:36,939 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-11-10 12:41:36,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 12:41:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-11-10 12:41:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-10 12:41:36,940 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:41:36,940 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:41:36,940 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:41:36,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:41:36,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1566812823, now seen corresponding path program 3 times [2018-11-10 12:41:36,940 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 12:41:36,940 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2018-11-10 12:41:36,943 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-10 12:41:37,571 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 12:41:37,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:41:37,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:41:41,238 WARN L179 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 7 [2018-11-10 12:41:43,633 WARN L832 $PredicateComparison]: unable to prove that (and (exists ((v_main_~x~0_13 (_ FloatingPoint 11 53))) (and (= c_main_~x~0 (fp.div RNE v_main_~x~0_13 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (not (fp.eq c_main_~x~0 v_main_~x~0_13)))) (= c_main_~x1~0 (fp.div RNE c_main_~x~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))))) is different from false [2018-11-10 12:41:45,832 WARN L854 $PredicateComparison]: unable to prove that (and (exists ((v_main_~x~0_13 (_ FloatingPoint 11 53))) (and (= c_main_~x~0 (fp.div RNE v_main_~x~0_13 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (not (fp.eq c_main_~x~0 v_main_~x~0_13)))) (= c_main_~x1~0 (fp.div RNE c_main_~x~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))))) is different from true [2018-11-10 12:41:48,223 WARN L832 $PredicateComparison]: unable to prove that (and (exists ((v_main_~x~0_13 (_ FloatingPoint 11 53))) (and (= c_main_~x~0 (fp.div RNE v_main_~x~0_13 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (not (fp.eq c_main_~x~0 v_main_~x~0_13)))) (fp.eq (fp.div RNE c_main_~x~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x~0)) is different from false [2018-11-10 12:41:50,417 WARN L854 $PredicateComparison]: unable to prove that (and (exists ((v_main_~x~0_13 (_ FloatingPoint 11 53))) (and (= c_main_~x~0 (fp.div RNE v_main_~x~0_13 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (not (fp.eq c_main_~x~0 v_main_~x~0_13)))) (fp.eq (fp.div RNE c_main_~x~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x~0)) is different from true [2018-11-10 12:42:03,466 WARN L832 $PredicateComparison]: unable to prove that (or (and (exists ((v_prenex_2 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_prenex_2 .cse1))) (and (not (fp.eq .cse0 v_prenex_2)) (fp.eq (fp.div RNE .cse0 .cse1) .cse0) (not (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))))) (= |c___VERIFIER_assert_#in~cond| (_ bv0 32))) (and (= (bvadd |c___VERIFIER_assert_#in~cond| (_ bv4294967295 32)) (_ bv0 32)) (exists ((v_main_~x~0_13 (_ FloatingPoint 11 53))) (let ((.cse3 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse2 (fp.div RNE v_main_~x~0_13 .cse3))) (and (not (fp.eq .cse2 v_main_~x~0_13)) (fp.eq (fp.div RNE .cse2 .cse3) .cse2) (fp.eq .cse2 ((_ to_fp 11 53) RNE (_ bv0 32))))))))) is different from false [2018-11-10 12:42:15,760 WARN L832 $PredicateComparison]: unable to prove that (or (and (= (_ bv0 32) c___VERIFIER_assert_~cond) (exists ((v_prenex_2 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_prenex_2 .cse1))) (and (not (fp.eq .cse0 v_prenex_2)) (fp.eq (fp.div RNE .cse0 .cse1) .cse0) (not (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))))))))) (and (exists ((v_main_~x~0_13 (_ FloatingPoint 11 53))) (let ((.cse3 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse2 (fp.div RNE v_main_~x~0_13 .cse3))) (and (not (fp.eq .cse2 v_main_~x~0_13)) (fp.eq (fp.div RNE .cse2 .cse3) .cse2) (fp.eq .cse2 ((_ to_fp 11 53) RNE (_ bv0 32))))))) (= (bvadd c___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)))) is different from false [2018-11-10 12:42:22,945 WARN L832 $PredicateComparison]: unable to prove that (exists ((v_prenex_2 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_prenex_2 .cse1))) (and (not (fp.eq .cse0 v_prenex_2)) (fp.eq (fp.div RNE .cse0 .cse1) .cse0) (not (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))))) is different from false [2018-11-10 12:42:25,286 WARN L854 $PredicateComparison]: unable to prove that (exists ((v_prenex_2 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_prenex_2 .cse1))) (and (not (fp.eq .cse0 v_prenex_2)) (fp.eq (fp.div RNE .cse0 .cse1) .cse0) (not (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))))) is different from true [2018-11-10 12:42:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2018-11-10 12:42:25,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 12:42:39,557 WARN L832 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~x1~0 c_main_~x~0) (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x1~0)) (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32)))) is different from false [2018-11-10 12:42:41,758 WARN L854 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~x1~0 c_main_~x~0) (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x1~0)) (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32)))) is different from true [2018-11-10 12:42:48,890 WARN L832 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_15 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_main_~x~0_15 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 v_main_~x~0_15))))) is different from false [2018-11-10 12:42:51,271 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_15 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_main_~x~0_15 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 v_main_~x~0_15))))) is different from true [2018-11-10 12:43:39,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:43:39,292 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_71086f14-b30d-41d4-82bc-1d9930dbb91a/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:43:39,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 12:44:33,462 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-10 12:44:33,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-11-10 12:44:34,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-10 12:44:34,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-11-10 12:44:34,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 12:44:34,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 12:44:34,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=29, Unknown=15, NotChecked=112, Total=182 [2018-11-10 12:44:34,652 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2018-11-10 12:44:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:44:37,146 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-10 12:44:37,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 12:44:37,538 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-11-10 12:44:37,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:44:37,539 INFO L225 Difference]: With dead ends: 22 [2018-11-10 12:44:37,539 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 12:44:37,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=26, Invalid=29, Unknown=15, NotChecked=112, Total=182 [2018-11-10 12:44:37,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 12:44:37,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 12:44:37,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 12:44:37,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 12:44:37,540 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-11-10 12:44:37,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:44:37,540 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 12:44:37,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 12:44:37,541 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 12:44:37,541 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 12:44:37,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 12:45:00,718 WARN L179 SmtUtils]: Spent 23.13 s on a formula simplification that was a NOOP. DAG size: 18 [2018-11-10 12:45:02,433 WARN L179 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 44 DAG size of output: 1 [2018-11-10 12:46:06,016 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:191) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:150) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplifyWithStatistics(SmtUtils.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeCFGHoareAnnotation(BasicCegarLoop.java:982) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 31 more [2018-11-10 12:46:06,018 INFO L168 Benchmark]: Toolchain (without parser) took 349139.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 954.6 MB in the beginning and 988.7 MB in the end (delta: -34.1 MB). Peak memory consumption was 114.8 MB. Max. memory is 11.5 GB. [2018-11-10 12:46:06,019 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:46:06,019 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.48 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 12:46:06,019 INFO L168 Benchmark]: Boogie Preprocessor took 20.36 ms. Allocated memory is still 1.0 GB. Free memory is still 943.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:46:06,020 INFO L168 Benchmark]: RCFGBuilder took 839.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 943.8 MB in the beginning and 1.1 GB in the end (delta: -179.8 MB). Peak memory consumption was 27.2 MB. Max. memory is 11.5 GB. [2018-11-10 12:46:06,020 INFO L168 Benchmark]: TraceAbstraction took 348116.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 988.7 MB in the end (delta: 134.9 MB). Peak memory consumption was 134.9 MB. Max. memory is 11.5 GB. [2018-11-10 12:46:06,024 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 159.48 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.36 ms. Allocated memory is still 1.0 GB. Free memory is still 943.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 839.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 943.8 MB in the beginning and 1.1 GB in the end (delta: -179.8 MB). Peak memory consumption was 27.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 348116.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 988.7 MB in the end (delta: 134.9 MB). Peak memory consumption was 134.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...