./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i -s /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d363a30f559764c47bcb73d637f2d7196a1b97b ......................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i -s /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d363a30f559764c47bcb73d637f2d7196a1b97b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 21:22:57,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 21:22:57,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 21:22:57,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 21:22:57,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 21:22:57,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 21:22:57,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 21:22:57,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 21:22:57,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 21:22:57,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 21:22:57,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 21:22:57,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 21:22:57,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 21:22:57,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 21:22:57,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 21:22:57,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 21:22:57,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 21:22:57,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 21:22:57,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 21:22:57,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 21:22:57,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 21:22:57,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 21:22:57,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 21:22:57,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 21:22:57,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 21:22:57,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 21:22:57,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 21:22:57,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 21:22:57,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 21:22:57,129 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 21:22:57,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 21:22:57,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 21:22:57,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 21:22:57,131 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 21:22:57,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 21:22:57,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 21:22:57,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 21:22:57,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 21:22:57,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 21:22:57,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 21:22:57,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 21:22:57,137 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 21:22:57,163 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 21:22:57,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 21:22:57,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 21:22:57,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 21:22:57,176 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 21:22:57,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 21:22:57,176 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 21:22:57,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 21:22:57,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 21:22:57,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 21:22:57,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 21:22:57,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 21:22:57,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 21:22:57,178 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 21:22:57,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 21:22:57,179 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 21:22:57,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 21:22:57,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 21:22:57,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 21:22:57,181 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 21:22:57,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 21:22:57,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 21:22:57,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 21:22:57,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 21:22:57,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 21:22:57,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 21:22:57,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 21:22:57,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 21:22:57,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d363a30f559764c47bcb73d637f2d7196a1b97b [2019-11-15 21:22:57,211 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 21:22:57,221 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 21:22:57,225 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 21:22:57,226 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 21:22:57,227 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 21:22:57,227 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2019-11-15 21:22:57,282 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/data/effbded5c/86c8e3eeafe841d9a0fff73d115898e3/FLAG84a6a1fcf [2019-11-15 21:22:57,622 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 21:22:57,622 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2019-11-15 21:22:57,628 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/data/effbded5c/86c8e3eeafe841d9a0fff73d115898e3/FLAG84a6a1fcf [2019-11-15 21:22:58,023 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/data/effbded5c/86c8e3eeafe841d9a0fff73d115898e3 [2019-11-15 21:22:58,026 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 21:22:58,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 21:22:58,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 21:22:58,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 21:22:58,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 21:22:58,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:22:58" (1/1) ... [2019-11-15 21:22:58,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29c2a5de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:58, skipping insertion in model container [2019-11-15 21:22:58,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:22:58" (1/1) ... [2019-11-15 21:22:58,044 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 21:22:58,058 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 21:22:58,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:22:58,189 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 21:22:58,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:22:58,277 INFO L192 MainTranslator]: Completed translation [2019-11-15 21:22:58,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:58 WrapperNode [2019-11-15 21:22:58,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 21:22:58,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 21:22:58,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 21:22:58,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 21:22:58,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:58" (1/1) ... [2019-11-15 21:22:58,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:58" (1/1) ... [2019-11-15 21:22:58,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 21:22:58,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 21:22:58,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 21:22:58,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 21:22:58,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:58" (1/1) ... [2019-11-15 21:22:58,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:58" (1/1) ... [2019-11-15 21:22:58,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:58" (1/1) ... [2019-11-15 21:22:58,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:58" (1/1) ... [2019-11-15 21:22:58,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:58" (1/1) ... [2019-11-15 21:22:58,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:58" (1/1) ... [2019-11-15 21:22:58,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:58" (1/1) ... [2019-11-15 21:22:58,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 21:22:58,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 21:22:58,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 21:22:58,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 21:22:58,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 21:22:58,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 21:22:58,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 21:22:58,547 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 21:22:58,548 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-15 21:22:58,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:22:58 BoogieIcfgContainer [2019-11-15 21:22:58,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 21:22:58,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 21:22:58,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 21:22:58,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 21:22:58,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 09:22:58" (1/3) ... [2019-11-15 21:22:58,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@606252f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:22:58, skipping insertion in model container [2019-11-15 21:22:58,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:22:58" (2/3) ... [2019-11-15 21:22:58,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@606252f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:22:58, skipping insertion in model container [2019-11-15 21:22:58,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:22:58" (3/3) ... [2019-11-15 21:22:58,561 INFO L109 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i [2019-11-15 21:22:58,570 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 21:22:58,579 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 21:22:58,589 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 21:22:58,614 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 21:22:58,615 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 21:22:58,615 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 21:22:58,615 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 21:22:58,616 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 21:22:58,616 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 21:22:58,616 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 21:22:58,616 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 21:22:58,629 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-15 21:22:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-15 21:22:58,636 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:22:58,637 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-15 21:22:58,638 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:22:58,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:22:58,644 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-11-15 21:22:58,653 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:22:58,654 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138670639] [2019-11-15 21:22:58,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:58,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:22:58,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:22:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:22:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:22:58,766 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:22:58,767 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 21:22:58,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 09:22:58 BoogieIcfgContainer [2019-11-15 21:22:58,785 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 21:22:58,785 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 21:22:58,785 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 21:22:58,785 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 21:22:58,786 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:22:58" (3/4) ... [2019-11-15 21:22:58,789 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-15 21:22:58,790 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 21:22:58,793 INFO L168 Benchmark]: Toolchain (without parser) took 763.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -155.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:22:58,794 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:22:58,795 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-15 21:22:58,796 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.90 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:22:58,797 INFO L168 Benchmark]: Boogie Preprocessor took 19.34 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:22:58,798 INFO L168 Benchmark]: RCFGBuilder took 223.01 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: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2019-11-15 21:22:58,799 INFO L168 Benchmark]: TraceAbstraction took 232.71 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. [2019-11-15 21:22:58,799 INFO L168 Benchmark]: Witness Printer took 4.77 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:22:58,807 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 247.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.90 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.34 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 223.01 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: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 232.71 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. * Witness Printer took 4.77 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 2]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 18, overapproximation of someBinaryArithmeticDOUBLEoperation at line 10. Possible FailurePath: [L9] double x = 1.0; [L10] double x1 = x/1.6; [L12] COND FALSE !(x1 != x) [L2] COND TRUE !(cond) [L2] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-11-15 21:23:00,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 21:23:00,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 21:23:00,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 21:23:00,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 21:23:00,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 21:23:00,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 21:23:00,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 21:23:00,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 21:23:00,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 21:23:00,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 21:23:00,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 21:23:00,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 21:23:00,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 21:23:00,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 21:23:00,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 21:23:00,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 21:23:00,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 21:23:00,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 21:23:00,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 21:23:00,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 21:23:00,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 21:23:00,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 21:23:00,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 21:23:00,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 21:23:00,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 21:23:00,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 21:23:00,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 21:23:00,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 21:23:00,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 21:23:00,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 21:23:00,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 21:23:00,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 21:23:00,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 21:23:00,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 21:23:00,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 21:23:00,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 21:23:00,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 21:23:00,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 21:23:00,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 21:23:00,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 21:23:00,972 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-15 21:23:00,986 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 21:23:00,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 21:23:00,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 21:23:00,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 21:23:00,987 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 21:23:00,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 21:23:00,988 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 21:23:00,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 21:23:00,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 21:23:00,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 21:23:00,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 21:23:00,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 21:23:00,989 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-15 21:23:00,989 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-15 21:23:00,990 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 21:23:00,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 21:23:00,990 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 21:23:00,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 21:23:00,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 21:23:00,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 21:23:00,991 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 21:23:00,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 21:23:00,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 21:23:00,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 21:23:00,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 21:23:00,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 21:23:00,992 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-15 21:23:00,993 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-15 21:23:00,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 21:23:00,993 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-15 21:23:00,993 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d363a30f559764c47bcb73d637f2d7196a1b97b [2019-11-15 21:23:01,022 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 21:23:01,033 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 21:23:01,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 21:23:01,037 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 21:23:01,037 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 21:23:01,038 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2019-11-15 21:23:01,088 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/data/a0452cc73/39997774f37046e7810c7080bad471e5/FLAG4497eecc7 [2019-11-15 21:23:01,486 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 21:23:01,486 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2019-11-15 21:23:01,491 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/data/a0452cc73/39997774f37046e7810c7080bad471e5/FLAG4497eecc7 [2019-11-15 21:23:01,510 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/data/a0452cc73/39997774f37046e7810c7080bad471e5 [2019-11-15 21:23:01,514 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 21:23:01,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 21:23:01,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 21:23:01,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 21:23:01,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 21:23:01,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:23:01" (1/1) ... [2019-11-15 21:23:01,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ff586f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:23:01, skipping insertion in model container [2019-11-15 21:23:01,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:23:01" (1/1) ... [2019-11-15 21:23:01,532 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 21:23:01,549 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 21:23:01,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:23:01,732 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 21:23:01,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:23:01,761 INFO L192 MainTranslator]: Completed translation [2019-11-15 21:23:01,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:23:01 WrapperNode [2019-11-15 21:23:01,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 21:23:01,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 21:23:01,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 21:23:01,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 21:23:01,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:23:01" (1/1) ... [2019-11-15 21:23:01,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:23:01" (1/1) ... [2019-11-15 21:23:01,855 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 21:23:01,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 21:23:01,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 21:23:01,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 21:23:01,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:23:01" (1/1) ... [2019-11-15 21:23:01,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:23:01" (1/1) ... [2019-11-15 21:23:01,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:23:01" (1/1) ... [2019-11-15 21:23:01,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:23:01" (1/1) ... [2019-11-15 21:23:01,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:23:01" (1/1) ... [2019-11-15 21:23:01,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:23:01" (1/1) ... [2019-11-15 21:23:01,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:23:01" (1/1) ... [2019-11-15 21:23:01,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 21:23:01,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 21:23:01,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 21:23:01,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 21:23:01,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:23:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 21:23:01,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 21:23:01,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 21:23:03,659 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 21:23:03,660 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-15 21:23:03,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:23:03 BoogieIcfgContainer [2019-11-15 21:23:03,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 21:23:03,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 21:23:03,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 21:23:03,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 21:23:03,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 09:23:01" (1/3) ... [2019-11-15 21:23:03,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65bd1390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:23:03, skipping insertion in model container [2019-11-15 21:23:03,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:23:01" (2/3) ... [2019-11-15 21:23:03,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65bd1390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:23:03, skipping insertion in model container [2019-11-15 21:23:03,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:23:03" (3/3) ... [2019-11-15 21:23:03,670 INFO L109 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i [2019-11-15 21:23:03,678 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 21:23:03,686 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 21:23:03,696 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 21:23:03,714 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 21:23:03,715 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 21:23:03,715 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 21:23:03,715 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 21:23:03,715 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 21:23:03,716 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 21:23:03,716 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 21:23:03,716 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 21:23:03,727 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-15 21:23:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-15 21:23:03,731 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:23:03,732 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-15 21:23:03,733 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:23:03,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:23:03,738 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-11-15 21:23:03,747 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 21:23:03,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315011200] [2019-11-15 21:23:03,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-11-15 21:23:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:23:04,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 21:23:04,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:23:06,911 WARN L191 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 11 [2019-11-15 21:23:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:23:06,918 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 21:23:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:23:09,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315011200] [2019-11-15 21:23:09,188 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:23:09,188 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-15 21:23:09,189 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921446260] [2019-11-15 21:23:09,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 21:23:09,193 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 21:23:09,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 21:23:09,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=5, Unknown=1, NotChecked=0, Total=12 [2019-11-15 21:23:09,208 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2019-11-15 21:23:16,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:23:16,812 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2019-11-15 21:23:16,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 21:23:16,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-15 21:23:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:23:16,820 INFO L225 Difference]: With dead ends: 19 [2019-11-15 21:23:16,821 INFO L226 Difference]: Without dead ends: 7 [2019-11-15 21:23:16,823 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6, Invalid=5, Unknown=1, NotChecked=0, Total=12 [2019-11-15 21:23:16,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-15 21:23:16,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-15 21:23:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-15 21:23:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-15 21:23:16,849 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-11-15 21:23:16,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:23:16,850 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-15 21:23:16,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 21:23:16,850 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-15 21:23:16,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-15 21:23:16,851 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:23:16,851 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-15 21:23:17,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-11-15 21:23:17,067 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:23:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:23:17,067 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2019-11-15 21:23:17,068 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 21:23:17,068 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209358351] [2019-11-15 21:23:17,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-11-15 21:23:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:23:17,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 21:23:17,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:23:22,427 WARN L191 SmtUtils]: Spent 4.76 s on a formula simplification that was a NOOP. DAG size: 12 [2019-11-15 21:23:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:23:22,430 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 21:23:35,807 WARN L191 SmtUtils]: Spent 2.97 s on a formula simplification that was a NOOP. DAG size: 7 [2019-11-15 21:23:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:23:35,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209358351] [2019-11-15 21:23:35,809 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:23:35,809 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2019-11-15 21:23:35,809 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729323908] [2019-11-15 21:23:35,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 21:23:35,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 21:23:35,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 21:23:35,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2019-11-15 21:23:35,812 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2019-11-15 21:23:50,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:23:50,370 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-11-15 21:23:50,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 21:23:50,371 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-11-15 21:23:50,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:23:50,372 INFO L225 Difference]: With dead ends: 13 [2019-11-15 21:23:50,372 INFO L226 Difference]: Without dead ends: 9 [2019-11-15 21:23:50,373 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=17, Invalid=21, Unknown=4, NotChecked=0, Total=42 [2019-11-15 21:23:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-15 21:23:50,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-15 21:23:50,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-15 21:23:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-15 21:23:50,376 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-11-15 21:23:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:23:50,376 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-15 21:23:50,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 21:23:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-15 21:23:50,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-15 21:23:50,377 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:23:50,377 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2019-11-15 21:23:50,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-11-15 21:23:50,578 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:23:50,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:23:50,579 INFO L82 PathProgramCache]: Analyzing trace with hash 516237138, now seen corresponding path program 2 times [2019-11-15 21:23:50,579 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 21:23:50,580 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225597461] [2019-11-15 21:23:50,580 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-11-15 21:23:51,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 21:23:51,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:23:51,661 WARN L254 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-15 21:23:51,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:24:00,855 WARN L191 SmtUtils]: Spent 2.92 s on a formula simplification that was a NOOP. DAG size: 14 [2019-11-15 21:24:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:24:00,859 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 21:24:39,920 WARN L191 SmtUtils]: Spent 9.69 s on a formula simplification that was a NOOP. DAG size: 11 [2019-11-15 21:24:42,403 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from false [2019-11-15 21:24:44,880 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from true [2019-11-15 21:24:47,596 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))))) is different from false [2019-11-15 21:24:50,301 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))))) is different from true [2019-11-15 21:24:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 5 not checked. [2019-11-15 21:24:50,303 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225597461] [2019-11-15 21:24:50,303 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:24:50,303 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2019-11-15 21:24:50,303 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303236363] [2019-11-15 21:24:50,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 21:24:50,304 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 21:24:50,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 21:24:50,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=57, Unknown=14, NotChecked=34, Total=132 [2019-11-15 21:24:50,305 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 12 states. [2019-11-15 21:24:53,011 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (.cse2 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (and (or (not (fp.eq c_ULTIMATE.start_main_~x1~0 c_ULTIMATE.start_main_~x~0)) (fp.eq c_ULTIMATE.start_main_~x~0 .cse0)) (let ((.cse1 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse2) .cse2))) (or (not (fp.eq (fp.div roundNearestTiesToEven .cse1 .cse2) .cse1)) (fp.eq .cse1 .cse0))) (= (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse2) c_ULTIMATE.start_main_~x1~0))) is different from true [2019-11-15 21:24:55,493 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0))) (.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (and (let ((.cse0 (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse2))) (or (fp.eq .cse0 .cse1) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse2) .cse0)))) (= (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse2) .cse2) c_ULTIMATE.start_main_~x1~0) (or (not (fp.eq c_ULTIMATE.start_main_~x1~0 c_ULTIMATE.start_main_~x~0)) (fp.eq c_ULTIMATE.start_main_~x~0 .cse1)))) is different from true [2019-11-15 21:25:08,780 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (and (or (not (fp.eq (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0))) c_ULTIMATE.start_main_~x1~0)) (fp.eq c_ULTIMATE.start_main_~x1~0 .cse0)) (fp.eq c_ULTIMATE.start_main_~x~0 .cse0))) is different from true [2019-11-15 21:25:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:25:13,498 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-11-15 21:25:13,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 21:25:13,500 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2019-11-15 21:25:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:25:13,500 INFO L225 Difference]: With dead ends: 17 [2019-11-15 21:25:13,500 INFO L226 Difference]: Without dead ends: 11 [2019-11-15 21:25:13,501 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.2s TimeCoverageRelationStatistics Valid=33, Invalid=60, Unknown=17, NotChecked=100, Total=210 [2019-11-15 21:25:13,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-15 21:25:13,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-15 21:25:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-15 21:25:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-15 21:25:13,504 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2019-11-15 21:25:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:25:13,505 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-15 21:25:13,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 21:25:13,505 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-15 21:25:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 21:25:13,505 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:25:13,505 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1] [2019-11-15 21:25:13,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-11-15 21:25:13,714 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:25:13,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:25:13,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2059024878, now seen corresponding path program 3 times [2019-11-15 21:25:13,715 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 21:25:13,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795252999] [2019-11-15 21:25:13,715 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-11-15 21:25:15,346 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-15 21:25:15,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:25:15,465 WARN L254 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-15 21:25:15,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:25:27,335 WARN L191 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 16 [2019-11-15 21:25:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:25:27,339 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 21:26:03,875 WARN L191 SmtUtils]: Spent 9.03 s on a formula simplification that was a NOOP. DAG size: 11 [2019-11-15 21:26:06,379 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from false [2019-11-15 21:26:08,871 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from true [2019-11-15 21:26:11,629 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))))) is different from false [2019-11-15 21:26:14,376 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))))) is different from true [2019-11-15 21:26:17,315 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))))) is different from false [2019-11-15 21:26:20,284 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))))) is different from true [2019-11-15 21:26:23,634 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))))) is different from false [2019-11-15 21:26:26,837 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))))) is different from true [2019-11-15 21:26:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 14 not checked. [2019-11-15 21:26:26,839 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795252999] [2019-11-15 21:26:26,839 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:26:26,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2019-11-15 21:26:26,840 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117883088] [2019-11-15 21:26:26,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-15 21:26:26,840 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 21:26:26,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-15 21:26:26,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=100, Unknown=11, NotChecked=92, Total=240 [2019-11-15 21:26:26,842 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 16 states. [2019-11-15 21:26:30,159 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (and (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2))) (or (not (fp.eq c_ULTIMATE.start_main_~x1~0 c_ULTIMATE.start_main_~x~0)) (fp.eq c_ULTIMATE.start_main_~x~0 .cse2)) (= (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse1) c_ULTIMATE.start_main_~x1~0))) is different from true [2019-11-15 21:26:33,176 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (and (= (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse0) .cse0) c_ULTIMATE.start_main_~x1~0) (or (not (fp.eq c_ULTIMATE.start_main_~x1~0 c_ULTIMATE.start_main_~x~0)) (fp.eq c_ULTIMATE.start_main_~x~0 .cse1)) (let ((.cse2 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse0) .cse0) .cse0))) (or (not (fp.eq (fp.div roundNearestTiesToEven .cse2 .cse0) .cse2)) (fp.eq .cse2 .cse1))))) is different from true [2019-11-15 21:26:35,917 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (and (= (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse0) .cse0) .cse0) c_ULTIMATE.start_main_~x1~0) (let ((.cse1 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse0) .cse0))) (or (not (fp.eq (fp.div roundNearestTiesToEven .cse1 .cse0) .cse1)) (fp.eq .cse1 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))))))) is different from true [2019-11-15 21:26:38,417 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (and (let ((.cse0 (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (not (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) (= c_ULTIMATE.start_main_~x1~0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse1) .cse1) .cse1) .cse1)))) is different from true [2019-11-15 21:26:51,206 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (and (or (not (fp.eq (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0))) c_ULTIMATE.start_main_~x1~0)) (fp.eq c_ULTIMATE.start_main_~x1~0 .cse0)) (fp.eq c_ULTIMATE.start_main_~x~0 .cse0))) is different from false [2019-11-15 21:26:59,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:26:59,877 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-11-15 21:26:59,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 21:26:59,878 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 10 [2019-11-15 21:26:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:26:59,878 INFO L225 Difference]: With dead ends: 19 [2019-11-15 21:26:59,878 INFO L226 Difference]: Without dead ends: 13 [2019-11-15 21:26:59,879 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.0s TimeCoverageRelationStatistics Valid=47, Invalid=105, Unknown=16, NotChecked=252, Total=420 [2019-11-15 21:26:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-15 21:26:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-15 21:26:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-15 21:26:59,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-15 21:26:59,884 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2019-11-15 21:26:59,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:26:59,885 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-15 21:26:59,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-15 21:26:59,885 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-15 21:26:59,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-15 21:26:59,886 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:26:59,886 INFO L380 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1] [2019-11-15 21:27:00,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-11-15 21:27:00,092 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:27:00,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:27:00,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1310307538, now seen corresponding path program 4 times [2019-11-15 21:27:00,093 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 21:27:00,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207352562] [2019-11-15 21:27:00,094 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03884262-5952-4054-99f7-6eba7991063c/bin/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 [2019-11-15 21:27:01,991 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 21:27:01,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:27:02,155 WARN L254 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-15 21:27:02,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:27:20,494 WARN L191 SmtUtils]: Spent 3.31 s on a formula simplification that was a NOOP. DAG size: 18 [2019-11-15 21:27:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:27:20,497 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 21:27:47,795 WARN L191 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 7 [2019-11-15 21:27:50,280 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from false [2019-11-15 21:27:52,759 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from true [2019-11-15 21:27:55,474 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from false [2019-11-15 21:27:58,195 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from true [2019-11-15 21:28:01,163 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from false [2019-11-15 21:28:04,142 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from true [2019-11-15 21:28:07,335 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from false [2019-11-15 21:28:10,612 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from true [2019-11-15 21:28:14,665 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from false [2019-11-15 21:28:18,618 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from true [2019-11-15 21:28:23,255 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0)))) is different from false [2019-11-15 21:28:25,995 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-11-15 21:28:26,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-11-15 21:28:26,196 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:153) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:140) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:851) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:580) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:418) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:335) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.checkFeasibility(TraceAbstractionRefinementEngine.java:244) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) 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:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 42 more [2019-11-15 21:28:26,200 INFO L168 Benchmark]: Toolchain (without parser) took 324684.94 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 952.3 MB in the beginning and 946.8 MB in the end (delta: 5.5 MB). Peak memory consumption was 125.0 MB. Max. memory is 11.5 GB. [2019-11-15 21:28:26,201 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:28:26,202 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.98 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 940.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-15 21:28:26,202 INFO L168 Benchmark]: Boogie Procedure Inliner took 91.27 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -174.8 MB). Peak memory consumption was 12.0 MB. Max. memory is 11.5 GB. [2019-11-15 21:28:26,203 INFO L168 Benchmark]: Boogie Preprocessor took 20.93 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-15 21:28:26,203 INFO L168 Benchmark]: RCFGBuilder took 1784.25 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-11-15 21:28:26,204 INFO L168 Benchmark]: TraceAbstraction took 322537.30 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 946.8 MB in the end (delta: 140.7 MB). Peak memory consumption was 140.7 MB. Max. memory is 11.5 GB. [2019-11-15 21:28:26,207 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 243.98 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 940.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 91.27 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -174.8 MB). Peak memory consumption was 12.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.93 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 1784.25 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 322537.30 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 946.8 MB in the end (delta: 140.7 MB). Peak memory consumption was 140.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...