./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/float-newlib/float_req_bl_1252b_false-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2e94e6aa Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/float-newlib/float_req_bl_1252b_false-unreach-call.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 c8e4dbe5a9ab518912f1108432d43f490ec977d7 .................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/float-newlib/float_req_bl_1252b_false-unreach-call.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 c8e4dbe5a9ab518912f1108432d43f490ec977d7 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-2e94e6a [2018-12-31 04:07:26,866 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 04:07:26,868 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 04:07:26,886 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 04:07:26,887 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 04:07:26,888 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 04:07:26,889 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 04:07:26,891 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 04:07:26,893 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 04:07:26,895 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 04:07:26,896 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 04:07:26,896 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 04:07:26,897 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 04:07:26,898 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 04:07:26,900 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 04:07:26,901 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 04:07:26,902 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 04:07:26,904 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 04:07:26,907 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 04:07:26,909 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 04:07:26,910 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 04:07:26,912 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 04:07:26,914 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 04:07:26,915 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 04:07:26,915 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 04:07:26,916 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 04:07:26,918 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 04:07:26,919 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 04:07:26,920 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 04:07:26,921 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 04:07:26,922 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 04:07:26,922 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 04:07:26,923 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 04:07:26,923 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 04:07:26,924 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 04:07:26,926 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 04:07:26,926 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 04:07:26,942 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 04:07:26,942 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 04:07:26,943 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 04:07:26,943 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 04:07:26,943 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 04:07:26,944 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 04:07:26,944 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 04:07:26,945 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 04:07:26,945 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 04:07:26,945 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 04:07:26,945 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 04:07:26,945 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 04:07:26,945 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 04:07:26,946 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 04:07:26,946 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 04:07:26,946 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 04:07:26,946 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 04:07:26,946 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 04:07:26,948 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 04:07:26,948 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 04:07:26,948 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 04:07:26,949 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 04:07:26,949 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 04:07:26,949 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 04:07:26,949 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 04:07:26,949 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 04:07:26,950 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 04:07:26,951 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 04:07:26,951 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> c8e4dbe5a9ab518912f1108432d43f490ec977d7 [2018-12-31 04:07:26,997 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 04:07:27,011 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 04:07:27,016 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 04:07:27,017 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 04:07:27,018 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 04:07:27,019 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/float-newlib/float_req_bl_1252b_false-unreach-call.c [2018-12-31 04:07:27,081 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e635abc2/d8b37bde6ecf40a4afd2e44985fb8fd6/FLAGf7a75c993 [2018-12-31 04:07:27,571 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 04:07:27,572 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/float-newlib/float_req_bl_1252b_false-unreach-call.c [2018-12-31 04:07:27,578 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e635abc2/d8b37bde6ecf40a4afd2e44985fb8fd6/FLAGf7a75c993 [2018-12-31 04:07:27,898 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e635abc2/d8b37bde6ecf40a4afd2e44985fb8fd6 [2018-12-31 04:07:27,901 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 04:07:27,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 04:07:27,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 04:07:27,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 04:07:27,908 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 04:07:27,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 04:07:27" (1/1) ... [2018-12-31 04:07:27,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a490510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:27, skipping insertion in model container [2018-12-31 04:07:27,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 04:07:27" (1/1) ... [2018-12-31 04:07:27,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 04:07:27,947 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 04:07:28,172 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 04:07:28,178 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 04:07:28,211 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 04:07:28,242 INFO L195 MainTranslator]: Completed translation [2018-12-31 04:07:28,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:28 WrapperNode [2018-12-31 04:07:28,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 04:07:28,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 04:07:28,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 04:07:28,245 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 04:07:28,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:28" (1/1) ... [2018-12-31 04:07:28,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:28" (1/1) ... [2018-12-31 04:07:28,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 04:07:28,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 04:07:28,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 04:07:28,303 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 04:07:28,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:28" (1/1) ... [2018-12-31 04:07:28,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:28" (1/1) ... [2018-12-31 04:07:28,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:28" (1/1) ... [2018-12-31 04:07:28,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:28" (1/1) ... [2018-12-31 04:07:28,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:28" (1/1) ... [2018-12-31 04:07:28,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:28" (1/1) ... [2018-12-31 04:07:28,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:28" (1/1) ... [2018-12-31 04:07:28,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 04:07:28,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 04:07:28,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 04:07:28,406 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 04:07:28,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 04:07:28,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2018-12-31 04:07:28,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2018-12-31 04:07:28,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 04:07:28,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 04:07:28,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-31 04:07:28,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-31 04:07:29,058 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 04:07:29,059 INFO L280 CfgBuilder]: Removed 18 assue(true) statements. [2018-12-31 04:07:29,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 04:07:29 BoogieIcfgContainer [2018-12-31 04:07:29,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 04:07:29,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 04:07:29,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 04:07:29,065 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 04:07:29,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 04:07:27" (1/3) ... [2018-12-31 04:07:29,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69cb3cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 04:07:29, skipping insertion in model container [2018-12-31 04:07:29,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:28" (2/3) ... [2018-12-31 04:07:29,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69cb3cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 04:07:29, skipping insertion in model container [2018-12-31 04:07:29,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 04:07:29" (3/3) ... [2018-12-31 04:07:29,069 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b_false-unreach-call.c [2018-12-31 04:07:29,080 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 04:07:29,089 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 04:07:29,108 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 04:07:29,147 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 04:07:29,148 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 04:07:29,148 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 04:07:29,148 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 04:07:29,149 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 04:07:29,149 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 04:07:29,149 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 04:07:29,150 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 04:07:29,150 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 04:07:29,166 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2018-12-31 04:07:29,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-31 04:07:29,172 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 04:07:29,173 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 04:07:29,175 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 04:07:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 04:07:29,181 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2018-12-31 04:07:29,183 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 04:07:29,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 04:07:29,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 04:07:29,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 04:07:29,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 04:07:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 04:07:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 04:07:29,311 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 04:07:29,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-31 04:07:29,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-31 04:07:29,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-31 04:07:29,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-31 04:07:29,334 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2018-12-31 04:07:29,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 04:07:29,354 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2018-12-31 04:07:29,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-31 04:07:29,355 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-31 04:07:29,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 04:07:29,366 INFO L225 Difference]: With dead ends: 62 [2018-12-31 04:07:29,367 INFO L226 Difference]: Without dead ends: 29 [2018-12-31 04:07:29,371 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-31 04:07:29,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-31 04:07:29,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-31 04:07:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-31 04:07:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2018-12-31 04:07:29,414 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2018-12-31 04:07:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 04:07:29,416 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2018-12-31 04:07:29,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-31 04:07:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2018-12-31 04:07:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-31 04:07:29,417 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 04:07:29,417 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 04:07:29,417 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 04:07:29,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 04:07:29,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2018-12-31 04:07:29,418 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 04:07:29,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 04:07:29,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 04:07:29,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 04:07:29,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 04:07:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 04:07:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 04:07:29,609 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 04:07:29,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-31 04:07:29,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-31 04:07:29,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-31 04:07:29,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-31 04:07:29,612 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2018-12-31 04:07:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 04:07:29,857 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2018-12-31 04:07:29,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-31 04:07:29,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-12-31 04:07:29,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 04:07:29,859 INFO L225 Difference]: With dead ends: 53 [2018-12-31 04:07:29,859 INFO L226 Difference]: Without dead ends: 44 [2018-12-31 04:07:29,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-31 04:07:29,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-31 04:07:29,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2018-12-31 04:07:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-31 04:07:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2018-12-31 04:07:29,869 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2018-12-31 04:07:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 04:07:29,869 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2018-12-31 04:07:29,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-31 04:07:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2018-12-31 04:07:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-31 04:07:29,871 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 04:07:29,871 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 04:07:29,872 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 04:07:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 04:07:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2018-12-31 04:07:29,873 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 04:07:29,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 04:07:29,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 04:07:29,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 04:07:29,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 04:07:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 04:07:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 04:07:29,965 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 04:07:29,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-31 04:07:29,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-31 04:07:29,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-31 04:07:29,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-31 04:07:29,967 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2018-12-31 04:07:30,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 04:07:30,118 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2018-12-31 04:07:30,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-31 04:07:30,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-12-31 04:07:30,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 04:07:30,122 INFO L225 Difference]: With dead ends: 55 [2018-12-31 04:07:30,122 INFO L226 Difference]: Without dead ends: 46 [2018-12-31 04:07:30,123 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-31 04:07:30,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-31 04:07:30,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2018-12-31 04:07:30,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-31 04:07:30,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2018-12-31 04:07:30,130 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2018-12-31 04:07:30,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 04:07:30,130 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2018-12-31 04:07:30,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-31 04:07:30,130 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2018-12-31 04:07:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-31 04:07:30,132 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 04:07:30,132 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 04:07:30,133 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 04:07:30,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 04:07:30,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2018-12-31 04:07:30,134 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 04:07:30,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 04:07:30,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 04:07:30,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 04:07:30,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 04:07:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 04:07:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 04:07:30,204 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-31 04:07:30,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 04:07:30 BoogieIcfgContainer [2018-12-31 04:07:30,235 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 04:07:30,236 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 04:07:30,236 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 04:07:30,236 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 04:07:30,237 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 04:07:29" (3/4) ... [2018-12-31 04:07:30,242 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-31 04:07:30,242 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 04:07:30,243 INFO L168 Benchmark]: Toolchain (without parser) took 2341.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 948.7 MB in the beginning and 1.1 GB in the end (delta: -104.3 MB). Peak memory consumption was 28.4 MB. Max. memory is 11.5 GB. [2018-12-31 04:07:30,246 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 04:07:30,246 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.49 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 937.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 04:07:30,247 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.72 ms. Allocated memory is still 1.0 GB. Free memory was 937.9 MB in the beginning and 932.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-31 04:07:30,248 INFO L168 Benchmark]: Boogie Preprocessor took 102.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -195.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 11.5 GB. [2018-12-31 04:07:30,249 INFO L168 Benchmark]: RCFGBuilder took 654.28 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: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 11.5 GB. [2018-12-31 04:07:30,251 INFO L168 Benchmark]: TraceAbstraction took 1174.53 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: 40.5 MB). Peak memory consumption was 40.5 MB. Max. memory is 11.5 GB. [2018-12-31 04:07:30,252 INFO L168 Benchmark]: Witness Printer took 6.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2018-12-31 04:07:30,258 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 339.49 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 937.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 58.72 ms. Allocated memory is still 1.0 GB. Free memory was 937.9 MB in the beginning and 932.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 102.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -195.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 654.28 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: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1174.53 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: 40.5 MB). Peak memory consumption was 40.5 MB. Max. memory is 11.5 GB. * Witness Printer took 6.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 79]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 78, overapproximation of someUnaryFLOAToperation at line 74. Possible FailurePath: [L73] float x = 0.0f; [L74] float y = -0.0f; [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L31-L32] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L34-L35] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L37] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L40] return 0; [L44] COND TRUE __fpclassify_float(x) == 0 [L45] return y; [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. UNSAFE Result, 1.0s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 135 SDtfs, 32 SDslu, 140 SDs, 0 SdLazy, 30 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 28 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 442 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-2e94e6a [2018-12-31 04:07:32,700 INFO L170 SettingsManager]: Resetting all preferences to default values... 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[2018-12-31 04:07:32,738 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 04:07:32,738 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 04:07:32,739 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 04:07:32,740 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 04:07:32,741 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 04:07:32,741 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 04:07:32,743 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 04:07:32,743 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 04:07:32,743 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 04:07:32,744 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 04:07:32,744 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 04:07:32,745 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 04:07:32,746 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 04:07:32,746 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-12-31 04:07:32,764 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 04:07:32,764 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 04:07:32,769 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 04:07:32,769 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 04:07:32,770 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 04:07:32,770 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 04:07:32,770 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 04:07:32,770 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 04:07:32,770 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 04:07:32,770 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 04:07:32,771 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 04:07:32,771 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 04:07:32,771 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-31 04:07:32,771 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-31 04:07:32,771 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 04:07:32,771 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 04:07:32,774 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 04:07:32,774 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 04:07:32,774 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 04:07:32,774 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 04:07:32,775 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 04:07:32,775 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 04:07:32,775 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 04:07:32,775 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 04:07:32,775 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 04:07:32,776 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 04:07:32,776 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-12-31 04:07:32,776 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 04:07:32,776 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-31 04:07:32,776 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-31 04:07:32,776 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> c8e4dbe5a9ab518912f1108432d43f490ec977d7 [2018-12-31 04:07:32,849 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 04:07:32,870 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 04:07:32,875 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 04:07:32,878 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 04:07:32,879 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 04:07:32,879 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/float-newlib/float_req_bl_1252b_false-unreach-call.c [2018-12-31 04:07:32,955 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74bae7f15/e89d9d956c3e4a14b5422079052291b6/FLAGc46c75081 [2018-12-31 04:07:33,410 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 04:07:33,411 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/float-newlib/float_req_bl_1252b_false-unreach-call.c [2018-12-31 04:07:33,419 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74bae7f15/e89d9d956c3e4a14b5422079052291b6/FLAGc46c75081 [2018-12-31 04:07:33,723 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74bae7f15/e89d9d956c3e4a14b5422079052291b6 [2018-12-31 04:07:33,727 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 04:07:33,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 04:07:33,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 04:07:33,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 04:07:33,734 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 04:07:33,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 04:07:33" (1/1) ... [2018-12-31 04:07:33,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55dc8670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:33, skipping insertion in model container [2018-12-31 04:07:33,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 04:07:33" (1/1) ... [2018-12-31 04:07:33,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 04:07:33,775 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 04:07:34,049 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 04:07:34,056 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 04:07:34,092 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 04:07:34,131 INFO L195 MainTranslator]: Completed translation [2018-12-31 04:07:34,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:34 WrapperNode [2018-12-31 04:07:34,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 04:07:34,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 04:07:34,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 04:07:34,133 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 04:07:34,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:34" (1/1) ... [2018-12-31 04:07:34,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:34" (1/1) ... [2018-12-31 04:07:34,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 04:07:34,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 04:07:34,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 04:07:34,215 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 04:07:34,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:34" (1/1) ... [2018-12-31 04:07:34,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:34" (1/1) ... [2018-12-31 04:07:34,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:34" (1/1) ... [2018-12-31 04:07:34,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:34" (1/1) ... [2018-12-31 04:07:34,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:34" (1/1) ... [2018-12-31 04:07:34,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:34" (1/1) ... [2018-12-31 04:07:34,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:34" (1/1) ... [2018-12-31 04:07:34,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 04:07:34,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 04:07:34,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 04:07:34,411 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 04:07:34,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 04:07:34,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2018-12-31 04:07:34,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-12-31 04:07:34,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 04:07:34,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 04:07:34,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2018-12-31 04:07:34,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-31 04:07:34,691 WARN L317 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 04:07:34,895 WARN L317 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 04:07:35,050 WARN L317 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 04:07:35,107 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 04:07:35,107 INFO L280 CfgBuilder]: Removed 18 assue(true) statements. [2018-12-31 04:07:35,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 04:07:35 BoogieIcfgContainer [2018-12-31 04:07:35,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 04:07:35,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 04:07:35,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 04:07:35,113 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 04:07:35,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 04:07:33" (1/3) ... [2018-12-31 04:07:35,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787cc293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 04:07:35, skipping insertion in model container [2018-12-31 04:07:35,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 04:07:34" (2/3) ... [2018-12-31 04:07:35,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787cc293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 04:07:35, skipping insertion in model container [2018-12-31 04:07:35,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 04:07:35" (3/3) ... [2018-12-31 04:07:35,117 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b_false-unreach-call.c [2018-12-31 04:07:35,129 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 04:07:35,140 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 04:07:35,160 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 04:07:35,195 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 04:07:35,197 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 04:07:35,197 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 04:07:35,197 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 04:07:35,197 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 04:07:35,197 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 04:07:35,197 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 04:07:35,198 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 04:07:35,198 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 04:07:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2018-12-31 04:07:35,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-31 04:07:35,224 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 04:07:35,225 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 04:07:35,227 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 04:07:35,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 04:07:35,234 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2018-12-31 04:07:35,239 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-31 04:07:35,240 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-12-31 04:07:35,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-12-31 04:07:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 04:07:35,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 04:07:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 04:07:35,326 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-31 04:07:35,345 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 04:07:35,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-31 04:07:35,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-31 04:07:35,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-31 04:07:35,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-31 04:07:35,367 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2018-12-31 04:07:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 04:07:35,387 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2018-12-31 04:07:35,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-31 04:07:35,389 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-31 04:07:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 04:07:35,400 INFO L225 Difference]: With dead ends: 62 [2018-12-31 04:07:35,401 INFO L226 Difference]: Without dead ends: 29 [2018-12-31 04:07:35,404 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-31 04:07:35,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-31 04:07:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-31 04:07:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-31 04:07:35,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2018-12-31 04:07:35,443 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2018-12-31 04:07:35,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 04:07:35,444 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2018-12-31 04:07:35,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-31 04:07:35,444 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2018-12-31 04:07:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-31 04:07:35,445 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 04:07:35,445 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 04:07:35,445 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 04:07:35,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 04:07:35,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2018-12-31 04:07:35,446 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-31 04:07:35,446 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-12-31 04:07:35,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 04:07:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 04:07:35,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 04:07:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 04:07:35,563 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-31 04:07:35,579 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 04:07:35,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-31 04:07:35,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-31 04:07:35,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-31 04:07:35,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-31 04:07:35,582 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2018-12-31 04:07:35,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 04:07:35,767 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2018-12-31 04:07:35,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-31 04:07:35,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-12-31 04:07:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 04:07:35,770 INFO L225 Difference]: With dead ends: 53 [2018-12-31 04:07:35,771 INFO L226 Difference]: Without dead ends: 44 [2018-12-31 04:07:35,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-31 04:07:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-31 04:07:35,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2018-12-31 04:07:35,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-31 04:07:35,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2018-12-31 04:07:35,785 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2018-12-31 04:07:35,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 04:07:35,785 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2018-12-31 04:07:35,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-31 04:07:35,786 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2018-12-31 04:07:35,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-31 04:07:35,786 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 04:07:35,787 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 04:07:35,791 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 04:07:35,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 04:07:35,791 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2018-12-31 04:07:35,792 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-31 04:07:35,792 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-12-31 04:07:35,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 04:07:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 04:07:35,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 04:07:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 04:07:35,995 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-31 04:07:36,006 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 04:07:36,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-31 04:07:36,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-31 04:07:36,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-31 04:07:36,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-31 04:07:36,008 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2018-12-31 04:07:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 04:07:36,111 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2018-12-31 04:07:36,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-31 04:07:36,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-12-31 04:07:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 04:07:36,113 INFO L225 Difference]: With dead ends: 50 [2018-12-31 04:07:36,113 INFO L226 Difference]: Without dead ends: 26 [2018-12-31 04:07:36,114 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-31 04:07:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-31 04:07:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-31 04:07:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-31 04:07:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2018-12-31 04:07:36,119 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 12 [2018-12-31 04:07:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 04:07:36,119 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2018-12-31 04:07:36,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-31 04:07:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2018-12-31 04:07:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-31 04:07:36,120 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 04:07:36,121 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 04:07:36,121 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 04:07:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 04:07:36,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2018-12-31 04:07:36,122 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-31 04:07:36,122 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-12-31 04:07:36,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 04:07:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 04:07:36,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 04:07:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 04:07:36,217 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-31 04:07:36,228 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 04:07:36,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-31 04:07:36,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-31 04:07:36,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-31 04:07:36,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-31 04:07:36,230 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2018-12-31 04:07:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 04:07:36,408 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2018-12-31 04:07:36,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-31 04:07:36,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-12-31 04:07:36,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 04:07:36,412 INFO L225 Difference]: With dead ends: 48 [2018-12-31 04:07:36,412 INFO L226 Difference]: Without dead ends: 39 [2018-12-31 04:07:36,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-31 04:07:36,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-31 04:07:36,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-12-31 04:07:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-31 04:07:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2018-12-31 04:07:36,428 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2018-12-31 04:07:36,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 04:07:36,429 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2018-12-31 04:07:36,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-31 04:07:36,429 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2018-12-31 04:07:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-31 04:07:36,430 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 04:07:36,430 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 04:07:36,430 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 04:07:36,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 04:07:36,432 INFO L82 PathProgramCache]: Analyzing trace with hash 874935118, now seen corresponding path program 1 times [2018-12-31 04:07:36,432 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-31 04:07:36,432 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-12-31 04:07:36,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2018-12-31 04:07:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 04:07:36,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 04:07:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 04:07:36,680 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-31 04:07:36,690 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 04:07:36,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 04:07:36,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 04:07:36,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 04:07:36,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 04:07:36,692 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2018-12-31 04:07:36,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 04:07:36,803 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2018-12-31 04:07:36,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 04:07:36,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-12-31 04:07:36,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 04:07:36,806 INFO L225 Difference]: With dead ends: 39 [2018-12-31 04:07:36,806 INFO L226 Difference]: Without dead ends: 23 [2018-12-31 04:07:36,807 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-12-31 04:07:36,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-31 04:07:36,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-31 04:07:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-31 04:07:36,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-12-31 04:07:36,814 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2018-12-31 04:07:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 04:07:36,814 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-12-31 04:07:36,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 04:07:36,815 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-12-31 04:07:36,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-31 04:07:36,815 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 04:07:36,816 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 04:07:36,816 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 04:07:36,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 04:07:36,816 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2018-12-31 04:07:36,817 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-31 04:07:36,817 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-12-31 04:07:36,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 04:07:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 04:07:36,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 04:07:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 04:07:36,912 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-31 04:07:36,922 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 04:07:36,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-31 04:07:36,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-31 04:07:36,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-31 04:07:36,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-31 04:07:36,923 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 3 states. [2018-12-31 04:07:36,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 04:07:36,942 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-12-31 04:07:36,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-31 04:07:36,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2018-12-31 04:07:36,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 04:07:36,944 INFO L225 Difference]: With dead ends: 33 [2018-12-31 04:07:36,945 INFO L226 Difference]: Without dead ends: 23 [2018-12-31 04:07:36,945 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-31 04:07:36,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-31 04:07:36,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-31 04:07:36,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-31 04:07:36,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-12-31 04:07:36,951 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-12-31 04:07:36,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 04:07:36,951 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-12-31 04:07:36,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-31 04:07:36,951 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-12-31 04:07:36,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-31 04:07:36,952 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 04:07:36,952 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 04:07:36,952 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 04:07:36,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 04:07:36,953 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2018-12-31 04:07:36,953 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-31 04:07:36,953 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2018-12-31 04:07:36,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 04:07:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 04:07:37,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 04:07:37,361 WARN L181 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 1 [2018-12-31 04:07:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 04:07:37,363 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-31 04:07:37,378 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 04:07:37,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-31 04:07:37,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 04:07:37,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 04:07:37,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-31 04:07:37,380 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2018-12-31 04:07:37,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 04:07:37,584 INFO L93 Difference]: Finished difference Result 26 states and 25 transitions. [2018-12-31 04:07:37,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 04:07:37,585 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-12-31 04:07:37,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 04:07:37,586 INFO L225 Difference]: With dead ends: 26 [2018-12-31 04:07:37,586 INFO L226 Difference]: Without dead ends: 23 [2018-12-31 04:07:37,587 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-12-31 04:07:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-31 04:07:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-31 04:07:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-31 04:07:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2018-12-31 04:07:37,592 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 18 [2018-12-31 04:07:37,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 04:07:37,592 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2018-12-31 04:07:37,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 04:07:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2018-12-31 04:07:37,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-31 04:07:37,593 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 04:07:37,593 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 04:07:37,593 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 04:07:37,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 04:07:37,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2018-12-31 04:07:37,594 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-31 04:07:37,594 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2018-12-31 04:07:37,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 04:07:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 04:07:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 04:07:37,859 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-31 04:07:37,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 04:07:37 BoogieIcfgContainer [2018-12-31 04:07:37,936 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 04:07:37,937 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 04:07:37,937 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 04:07:37,937 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 04:07:37,939 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 04:07:35" (3/4) ... [2018-12-31 04:07:37,943 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-31 04:07:38,019 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 04:07:38,020 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 04:07:38,021 INFO L168 Benchmark]: Toolchain (without parser) took 4293.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 946.0 MB in the beginning and 950.6 MB in the end (delta: -4.6 MB). Peak memory consumption was 123.8 MB. Max. memory is 11.5 GB. [2018-12-31 04:07:38,022 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 04:07:38,023 INFO L168 Benchmark]: CACSL2BoogieTranslator took 402.44 ms. Allocated memory is still 1.0 GB. Free memory was 946.0 MB in the beginning and 935.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 04:07:38,024 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.45 ms. Allocated memory is still 1.0 GB. Free memory was 935.3 MB in the beginning and 929.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-31 04:07:38,025 INFO L168 Benchmark]: Boogie Preprocessor took 195.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 929.9 MB in the beginning and 1.1 GB in the end (delta: -184.1 MB). Peak memory consumption was 13.8 MB. Max. memory is 11.5 GB. [2018-12-31 04:07:38,026 INFO L168 Benchmark]: RCFGBuilder took 697.48 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: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. [2018-12-31 04:07:38,027 INFO L168 Benchmark]: TraceAbstraction took 2827.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 950.6 MB in the end (delta: 144.6 MB). Peak memory consumption was 144.6 MB. Max. memory is 11.5 GB. [2018-12-31 04:07:38,028 INFO L168 Benchmark]: Witness Printer took 83.08 ms. Allocated memory is still 1.2 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 04:07:38,033 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 402.44 ms. Allocated memory is still 1.0 GB. Free memory was 946.0 MB in the beginning and 935.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 81.45 ms. Allocated memory is still 1.0 GB. Free memory was 935.3 MB in the beginning and 929.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 195.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 929.9 MB in the beginning and 1.1 GB in the end (delta: -184.1 MB). Peak memory consumption was 13.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 697.48 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: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2827.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 950.6 MB in the end (delta: 144.6 MB). Peak memory consumption was 144.6 MB. Max. memory is 11.5 GB. * Witness Printer took 83.08 ms. Allocated memory is still 1.2 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 79]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L73] float x = 0.0f; [L74] float y = -0.0f; [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND TRUE w == 0x00000000 || w == 0x80000000 [L30] return 2; [L44] COND FALSE !(__fpclassify_float(x) == 0) [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND TRUE w == 0x00000000 || w == 0x80000000 [L30] return 2; [L48] COND FALSE !(__fpclassify_float(y) == 0) [L51] EXPR x > y ? x : y [L51] return x > y ? x : y; [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L55] __uint32_t w; [L58] ieee_float_shape_type gf_u; [L59] gf_u.value = (x) [L60] EXPR gf_u.word [L60] (w) = gf_u.word [L63] return (w & 0x80000000) != 0; [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. UNSAFE Result, 2.7s OverallTime, 8 OverallIterations, 1 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 214 SDtfs, 118 SDslu, 217 SDs, 0 SdLazy, 82 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 4287 SizeOfPredicates, 25 NumberOfNonLiveVariables, 304 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...