./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1211a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2880296f Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1211a.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 848145e4cbba5c96c3717deaa592791944a459a5 ............................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1211a.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 848145e4cbba5c96c3717deaa592791944a459a5 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") --- Real Ultimate output --- This is Ultimate 0.2.0-2880296 [2020-12-02 16:18:52,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 16:18:52,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 16:18:52,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 16:18:52,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 16:18:52,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 16:18:52,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 16:18:52,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 16:18:52,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 16:18:52,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 16:18:52,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 16:18:52,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 16:18:52,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 16:18:52,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 16:18:52,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 16:18:52,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 16:18:52,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 16:18:52,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 16:18:52,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 16:18:52,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 16:18:52,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 16:18:52,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 16:18:52,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 16:18:52,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 16:18:52,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 16:18:52,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 16:18:52,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 16:18:52,361 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 16:18:52,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 16:18:52,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 16:18:52,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 16:18:52,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 16:18:52,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 16:18:52,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 16:18:52,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 16:18:52,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 16:18:52,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 16:18:52,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 16:18:52,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 16:18:52,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 16:18:52,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 16:18:52,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-02 16:18:52,441 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 16:18:52,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 16:18:52,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 16:18:52,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 16:18:52,446 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 16:18:52,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 16:18:52,447 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 16:18:52,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-02 16:18:52,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 16:18:52,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 16:18:52,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 16:18:52,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 16:18:52,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 16:18:52,449 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 16:18:52,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 16:18:52,450 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 16:18:52,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 16:18:52,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 16:18:52,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 16:18:52,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 16:18:52,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 16:18:52,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 16:18:52,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 16:18:52,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 16:18:52,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 16:18:52,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-02 16:18:52,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-02 16:18:52,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 16:18:52,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 16:18:52,453 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 848145e4cbba5c96c3717deaa592791944a459a5 [2020-12-02 16:18:52,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 16:18:52,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 16:18:52,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 16:18:52,944 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 16:18:52,944 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 16:18:52,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1211a.c [2020-12-02 16:18:53,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b90a31bbf/7418b9f29c4b4d9681e247f4f64aa33e/FLAG4efc05446 [2020-12-02 16:18:53,647 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 16:18:53,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1211a.c [2020-12-02 16:18:53,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b90a31bbf/7418b9f29c4b4d9681e247f4f64aa33e/FLAG4efc05446 [2020-12-02 16:18:54,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b90a31bbf/7418b9f29c4b4d9681e247f4f64aa33e [2020-12-02 16:18:54,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 16:18:54,032 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 16:18:54,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 16:18:54,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 16:18:54,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 16:18:54,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:18:54" (1/1) ... [2020-12-02 16:18:54,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@123d1083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:54, skipping insertion in model container [2020-12-02 16:18:54,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:18:54" (1/1) ... [2020-12-02 16:18:54,055 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 16:18:54,088 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 16:18:54,338 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1211a.c[2576,2589] [2020-12-02 16:18:54,347 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:18:54,370 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 16:18:54,424 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1211a.c[2576,2589] [2020-12-02 16:18:54,425 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:18:54,445 INFO L217 MainTranslator]: Completed translation [2020-12-02 16:18:54,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:54 WrapperNode [2020-12-02 16:18:54,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 16:18:54,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 16:18:54,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 16:18:54,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 16:18:54,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:54" (1/1) ... [2020-12-02 16:18:54,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:54" (1/1) ... [2020-12-02 16:18:54,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 16:18:54,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 16:18:54,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 16:18:54,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 16:18:54,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:54" (1/1) ... [2020-12-02 16:18:54,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:54" (1/1) ... [2020-12-02 16:18:54,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:54" (1/1) ... [2020-12-02 16:18:54,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:54" (1/1) ... [2020-12-02 16:18:54,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:54" (1/1) ... [2020-12-02 16:18:54,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:54" (1/1) ... [2020-12-02 16:18:54,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:54" (1/1) ... [2020-12-02 16:18:54,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 16:18:54,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 16:18:54,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 16:18:54,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 16:18:54,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:54" (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 [2020-12-02 16:18:54,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-02 16:18:54,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 16:18:54,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-02 16:18:54,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-02 16:18:54,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-02 16:18:54,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 16:18:54,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 16:18:54,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-12-02 16:18:54,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-02 16:18:54,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-02 16:18:55,359 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 16:18:55,361 INFO L298 CfgBuilder]: Removed 28 assume(true) statements. [2020-12-02 16:18:55,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:18:55 BoogieIcfgContainer [2020-12-02 16:18:55,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 16:18:55,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 16:18:55,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 16:18:55,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 16:18:55,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:18:54" (1/3) ... [2020-12-02 16:18:55,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605c998a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:18:55, skipping insertion in model container [2020-12-02 16:18:55,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:54" (2/3) ... [2020-12-02 16:18:55,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605c998a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:18:55, skipping insertion in model container [2020-12-02 16:18:55,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:18:55" (3/3) ... [2020-12-02 16:18:55,382 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1211a.c [2020-12-02 16:18:55,400 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 16:18:55,405 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 16:18:55,422 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 16:18:55,472 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 16:18:55,473 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 16:18:55,473 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 16:18:55,473 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 16:18:55,473 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 16:18:55,473 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 16:18:55,474 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 16:18:55,474 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 16:18:55,496 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-12-02 16:18:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-02 16:18:55,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:18:55,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:18:55,508 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:18:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:18:55,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1888439402, now seen corresponding path program 1 times [2020-12-02 16:18:55,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 16:18:55,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313304709] [2020-12-02 16:18:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 16:18:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:18:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:18:55,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313304709] [2020-12-02 16:18:55,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:18:55,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 16:18:55,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604992078] [2020-12-02 16:18:55,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 16:18:55,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 16:18:55,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 16:18:55,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 16:18:55,765 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2020-12-02 16:18:55,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:18:55,794 INFO L93 Difference]: Finished difference Result 82 states and 128 transitions. [2020-12-02 16:18:55,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 16:18:55,796 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-12-02 16:18:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:18:55,807 INFO L225 Difference]: With dead ends: 82 [2020-12-02 16:18:55,808 INFO L226 Difference]: Without dead ends: 39 [2020-12-02 16:18:55,811 INFO L677 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 [2020-12-02 16:18:55,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-02 16:18:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-02 16:18:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-02 16:18:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-12-02 16:18:55,854 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 15 [2020-12-02 16:18:55,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:18:55,855 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-12-02 16:18:55,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 16:18:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-12-02 16:18:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-02 16:18:55,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:18:55,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:18:55,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-02 16:18:55,857 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:18:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:18:55,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1291452088, now seen corresponding path program 1 times [2020-12-02 16:18:55,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 16:18:55,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504015718] [2020-12-02 16:18:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 16:18:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:18:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:18:55,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504015718] [2020-12-02 16:18:55,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:18:55,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-02 16:18:55,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326241976] [2020-12-02 16:18:55,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-02 16:18:55,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 16:18:55,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-02 16:18:55,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-02 16:18:55,971 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 3 states. [2020-12-02 16:18:56,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:18:56,008 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-12-02 16:18:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-02 16:18:56,010 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-02 16:18:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:18:56,013 INFO L225 Difference]: With dead ends: 42 [2020-12-02 16:18:56,015 INFO L226 Difference]: Without dead ends: 39 [2020-12-02 16:18:56,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-02 16:18:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-02 16:18:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-02 16:18:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-02 16:18:56,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-02 16:18:56,031 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 18 [2020-12-02 16:18:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:18:56,033 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-02 16:18:56,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-02 16:18:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-02 16:18:56,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-02 16:18:56,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:18:56,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:18:56,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-02 16:18:56,038 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:18:56,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:18:56,039 INFO L82 PathProgramCache]: Analyzing trace with hash -182496670, now seen corresponding path program 1 times [2020-12-02 16:18:56,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 16:18:56,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511475287] [2020-12-02 16:18:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 16:18:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 16:18:56,156 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 16:18:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 16:18:56,252 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 16:18:56,292 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-02 16:18:56,293 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 16:18:56,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-02 16:18:56,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:18:56 BoogieIcfgContainer [2020-12-02 16:18:56,340 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 16:18:56,341 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 16:18:56,341 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 16:18:56,341 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 16:18:56,342 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:18:55" (3/4) ... [2020-12-02 16:18:56,346 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-02 16:18:56,346 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 16:18:56,349 INFO L168 Benchmark]: Toolchain (without parser) took 2317.68 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 24.2 MB in the beginning and 32.7 MB in the end (delta: -8.5 MB). Peak memory consumption was 3.8 MB. Max. memory is 16.1 GB. [2020-12-02 16:18:56,350 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 37.7 MB. Free memory was 20.1 MB in the beginning and 20.0 MB in the end (delta: 44.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:18:56,351 INFO L168 Benchmark]: CACSL2BoogieTranslator took 410.55 ms. Allocated memory is still 46.1 MB. Free memory was 24.1 MB in the beginning and 23.9 MB in the end (delta: 137.3 kB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-12-02 16:18:56,352 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.59 ms. Allocated memory is still 46.1 MB. Free memory was 23.9 MB in the beginning and 21.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 16:18:56,353 INFO L168 Benchmark]: Boogie Preprocessor took 54.94 ms. Allocated memory is still 46.1 MB. Free memory was 21.9 MB in the beginning and 20.1 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:18:56,354 INFO L168 Benchmark]: RCFGBuilder took 804.91 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 20.1 MB in the beginning and 39.1 MB in the end (delta: -19.0 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2020-12-02 16:18:56,355 INFO L168 Benchmark]: TraceAbstraction took 972.36 ms. Allocated memory is still 56.6 MB. Free memory was 38.8 MB in the beginning and 33.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. [2020-12-02 16:18:56,356 INFO L168 Benchmark]: Witness Printer took 5.68 ms. Allocated memory is still 56.6 MB. Free memory was 33.0 MB in the beginning and 32.7 MB in the end (delta: 326.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:18:56,361 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 37.7 MB. Free memory was 20.1 MB in the beginning and 20.0 MB in the end (delta: 44.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 410.55 ms. Allocated memory is still 46.1 MB. Free memory was 24.1 MB in the beginning and 23.9 MB in the end (delta: 137.3 kB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.59 ms. Allocated memory is still 46.1 MB. Free memory was 23.9 MB in the beginning and 21.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.94 ms. Allocated memory is still 46.1 MB. Free memory was 21.9 MB in the beginning and 20.1 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 804.91 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 20.1 MB in the beginning and 39.1 MB in the end (delta: -19.0 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 972.36 ms. Allocated memory is still 56.6 MB. Free memory was 38.8 MB in the beginning and 33.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. * Witness Printer took 5.68 ms. Allocated memory is still 56.6 MB. Free memory was 33.0 MB in the beginning and 32.7 MB in the end (delta: 326.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 112]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryArithmeticFLOAT_SMToperation at line 106, overapproximation of bitwiseAnd at line 95, overapproximation of someBinaryFLOAT_SMTComparisonOperation at line 111. Possible FailurePath: [L14] static const float one_modf = 1.0; VAL [one_modf=1] [L106] float x = 1.0f / 0.0f; [L107] float iptr = __VERIFIER_nondet_float(); [L17] __int32_t i0, j0; [L18] __uint32_t i; VAL [one_modf=1] [L20] ieee_float_shape_type gf_u; [L21] gf_u.value = (x) [L22] EXPR gf_u.word [L22] (i0) = gf_u.word [L24] j0 = ((i0 >> 23) & 0xff) - 0x7f VAL [one_modf=1] [L25] COND TRUE j0 < 23 VAL [one_modf=1] [L26] COND TRUE j0 < 0 VAL [one_modf=1] [L28] ieee_float_shape_type sf_u; [L29] sf_u.word = (i0 & 0x80000000) [L30] EXPR sf_u.value [L30] (*iptr) = sf_u.value [L32] return x; VAL [one_modf=1] [L108] float res = modf_float(x, &iptr); [L111] EXPR \read(iptr) [L89] __int32_t ix; VAL [one_modf=1] [L91] ieee_float_shape_type gf_u; [L92] gf_u.value = (x) [L93] EXPR gf_u.word [L93] (ix) = gf_u.word [L95] ix &= 0x7fffffff [L96] return ((ix) == 0x7f800000L); VAL [one_modf=1] [L111] isinf_float(iptr) && !(res == 0.0f && __signbit_float(res) == 0) [L111] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [one_modf=1] [L111] isinf_float(iptr) && !(res == 0.0f && __signbit_float(res) == 0) VAL [one_modf=1] [L111] COND TRUE isinf_float(iptr) && !(res == 0.0f && __signbit_float(res) == 0) [L112] reach_error() VAL [one_modf=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 89 SDtfs, 0 SDslu, 37 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 31 ConstructedInterpolants, 0 QuantifiedInterpolants, 502 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-2880296 [2020-12-02 16:18:59,203 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-12-02 16:18:59,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 16:18:59,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 16:18:59,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 16:18:59,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 16:18:59,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 16:18:59,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 16:18:59,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 16:18:59,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 16:18:59,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 16:18:59,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 16:18:59,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 16:18:59,354 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-02 16:18:59,393 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 16:18:59,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 16:18:59,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 16:18:59,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 16:18:59,395 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 16:18:59,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 16:18:59,396 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 16:18:59,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 16:18:59,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 16:18:59,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 16:18:59,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 16:18:59,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 16:18:59,397 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-02 16:18:59,397 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-02 16:18:59,397 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 16:18:59,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 16:18:59,398 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 16:18:59,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 16:18:59,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 16:18:59,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 16:18:59,399 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 16:18:59,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 16:18:59,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 16:18:59,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 16:18:59,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 16:18:59,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 16:18:59,400 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-02 16:18:59,400 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-02 16:18:59,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 16:18:59,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 16:18:59,400 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-02 16:18:59,401 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 848145e4cbba5c96c3717deaa592791944a459a5 [2020-12-02 16:18:59,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 16:18:59,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 16:18:59,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 16:18:59,882 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 16:18:59,883 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 16:18:59,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1211a.c [2020-12-02 16:18:59,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ad3feec5/a1e3e39f88354428ba68e22179894242/FLAG67a10f5c3 [2020-12-02 16:19:00,648 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 16:19:00,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1211a.c [2020-12-02 16:19:00,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ad3feec5/a1e3e39f88354428ba68e22179894242/FLAG67a10f5c3 [2020-12-02 16:19:01,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ad3feec5/a1e3e39f88354428ba68e22179894242 [2020-12-02 16:19:01,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 16:19:01,020 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 16:19:01,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 16:19:01,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 16:19:01,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 16:19:01,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:19:01" (1/1) ... [2020-12-02 16:19:01,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f157cce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:19:01, skipping insertion in model container [2020-12-02 16:19:01,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:19:01" (1/1) ... [2020-12-02 16:19:01,044 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 16:19:01,067 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 16:19:01,338 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1211a.c[2576,2589] [2020-12-02 16:19:01,343 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:19:01,367 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 16:19:01,464 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1211a.c[2576,2589] [2020-12-02 16:19:01,468 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:19:01,508 INFO L217 MainTranslator]: Completed translation [2020-12-02 16:19:01,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:19:01 WrapperNode [2020-12-02 16:19:01,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 16:19:01,511 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 16:19:01,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 16:19:01,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 16:19:01,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:19:01" (1/1) ... [2020-12-02 16:19:01,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:19:01" (1/1) ... [2020-12-02 16:19:01,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 16:19:01,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 16:19:01,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 16:19:01,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 16:19:01,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:19:01" (1/1) ... [2020-12-02 16:19:01,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:19:01" (1/1) ... [2020-12-02 16:19:01,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:19:01" (1/1) ... [2020-12-02 16:19:01,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:19:01" (1/1) ... [2020-12-02 16:19:01,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:19:01" (1/1) ... [2020-12-02 16:19:01,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:19:01" (1/1) ... [2020-12-02 16:19:01,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:19:01" (1/1) ... [2020-12-02 16:19:01,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 16:19:01,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 16:19:01,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 16:19:01,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 16:19:01,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:19:01" (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 [2020-12-02 16:19:01,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_DOUBLE [2020-12-02 16:19:01,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE4 [2020-12-02 16:19:01,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-02 16:19:01,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 16:19:01,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2020-12-02 16:19:01,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-02 16:19:01,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 16:19:01,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 16:19:01,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-12-02 16:19:01,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-12-02 16:19:01,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-02 16:19:01,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-02 16:19:03,048 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 16:19:03,048 INFO L298 CfgBuilder]: Removed 28 assume(true) statements. [2020-12-02 16:19:03,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:19:03 BoogieIcfgContainer [2020-12-02 16:19:03,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 16:19:03,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 16:19:03,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 16:19:03,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 16:19:03,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:19:01" (1/3) ... [2020-12-02 16:19:03,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7db0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:19:03, skipping insertion in model container [2020-12-02 16:19:03,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:19:01" (2/3) ... [2020-12-02 16:19:03,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7db0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:19:03, skipping insertion in model container [2020-12-02 16:19:03,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:19:03" (3/3) ... [2020-12-02 16:19:03,060 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1211a.c [2020-12-02 16:19:03,076 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 16:19:03,081 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 16:19:03,095 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 16:19:03,126 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 16:19:03,126 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 16:19:03,126 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 16:19:03,126 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 16:19:03,126 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 16:19:03,126 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 16:19:03,126 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 16:19:03,127 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 16:19:03,143 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-12-02 16:19:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-02 16:19:03,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:19:03,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:19:03,152 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:19:03,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:19:03,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1888439402, now seen corresponding path program 1 times [2020-12-02 16:19:03,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:19:03,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901468881] [2020-12-02 16:19:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-02 16:19:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:19:03,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-02 16:19:03,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:19:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:19:03,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:19:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:19:03,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901468881] [2020-12-02 16:19:03,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:19:03,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-02 16:19:03,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223266882] [2020-12-02 16:19:03,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 16:19:03,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:19:03,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 16:19:03,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 16:19:03,691 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2020-12-02 16:19:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:19:03,715 INFO L93 Difference]: Finished difference Result 82 states and 128 transitions. [2020-12-02 16:19:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 16:19:03,717 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-12-02 16:19:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:19:03,728 INFO L225 Difference]: With dead ends: 82 [2020-12-02 16:19:03,728 INFO L226 Difference]: Without dead ends: 39 [2020-12-02 16:19:03,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 16:19:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-02 16:19:03,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-02 16:19:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-02 16:19:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-12-02 16:19:03,774 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 15 [2020-12-02 16:19:03,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:19:03,774 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-12-02 16:19:03,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 16:19:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-12-02 16:19:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-02 16:19:03,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:19:03,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:19:03,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-02 16:19:03,992 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:19:03,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:19:03,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1291452088, now seen corresponding path program 1 times [2020-12-02 16:19:03,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:19:03,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140383198] [2020-12-02 16:19:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-02 16:19:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:19:04,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-02 16:19:04,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:19:05,678 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-02 16:19:08,491 WARN L197 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-02 16:19:13,483 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-02 16:19:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:19:13,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:19:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:19:16,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140383198] [2020-12-02 16:19:16,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:19:16,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2020-12-02 16:19:16,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220305983] [2020-12-02 16:19:16,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-02 16:19:16,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:19:16,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-02 16:19:16,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-02 16:19:16,538 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2020-12-02 16:19:21,857 WARN L197 SmtUtils]: Spent 940.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-02 16:19:30,697 WARN L197 SmtUtils]: Spent 3.94 s on a formula simplification that was a NOOP. DAG size: 36 [2020-12-02 16:19:41,047 WARN L197 SmtUtils]: Spent 9.05 s on a formula simplification that was a NOOP. DAG size: 46 [2020-12-02 16:19:51,925 WARN L197 SmtUtils]: Spent 3.17 s on a formula simplification that was a NOOP. DAG size: 38 [2020-12-02 16:19:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:19:52,520 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-12-02 16:19:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-02 16:19:52,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-12-02 16:19:52,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:19:52,614 INFO L225 Difference]: With dead ends: 54 [2020-12-02 16:19:52,615 INFO L226 Difference]: Without dead ends: 26 [2020-12-02 16:19:52,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-02 16:19:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-02 16:19:52,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-02 16:19:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-02 16:19:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-02 16:19:52,625 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2020-12-02 16:19:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:19:52,626 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-02 16:19:52,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-02 16:19:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-02 16:19:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-02 16:19:52,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:19:52,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:19:52,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-02 16:19:52,836 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:19:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:19:52,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1647807069, now seen corresponding path program 1 times [2020-12-02 16:19:52,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:19:52,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991282225] [2020-12-02 16:19:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-02 16:19:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:19:53,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-02 16:19:53,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:19:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:19:53,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:19:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:19:53,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991282225] [2020-12-02 16:19:53,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:19:53,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-12-02 16:19:53,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385341872] [2020-12-02 16:19:53,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-02 16:19:53,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:19:53,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-02 16:19:53,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-02 16:19:53,265 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 3 states. [2020-12-02 16:19:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:19:53,330 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-12-02 16:19:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-02 16:19:53,331 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-02 16:19:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:19:53,332 INFO L225 Difference]: With dead ends: 29 [2020-12-02 16:19:53,332 INFO L226 Difference]: Without dead ends: 26 [2020-12-02 16:19:53,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-02 16:19:53,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-02 16:19:53,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-02 16:19:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-02 16:19:53,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-02 16:19:53,340 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 19 [2020-12-02 16:19:53,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:19:53,340 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-02 16:19:53,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-02 16:19:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-02 16:19:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-02 16:19:53,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:19:53,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:19:53,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-02 16:19:53,556 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:19:53,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:19:53,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1322743609, now seen corresponding path program 1 times [2020-12-02 16:19:53,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:19:53,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041726124] [2020-12-02 16:19:53,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-02 16:19:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:19:53,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-02 16:19:53,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:19:54,298 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 16:19:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:19:54,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:19:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:19:55,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041726124] [2020-12-02 16:19:55,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:19:55,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-12-02 16:19:55,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157211122] [2020-12-02 16:19:55,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-02 16:19:55,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:19:55,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-02 16:19:55,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-02 16:19:55,082 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2020-12-02 16:19:55,886 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-12-02 16:19:56,327 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2020-12-02 16:19:56,715 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2020-12-02 16:19:56,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:19:56,824 INFO L93 Difference]: Finished difference Result 30 states and 29 transitions. [2020-12-02 16:19:56,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-02 16:19:56,825 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-02 16:19:56,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:19:56,826 INFO L225 Difference]: With dead ends: 30 [2020-12-02 16:19:56,826 INFO L226 Difference]: Without dead ends: 26 [2020-12-02 16:19:56,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-02 16:19:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-02 16:19:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-02 16:19:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-02 16:19:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 25 transitions. [2020-12-02 16:19:56,841 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 25 transitions. Word has length 21 [2020-12-02 16:19:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:19:56,841 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 25 transitions. [2020-12-02 16:19:56,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-02 16:19:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 25 transitions. [2020-12-02 16:19:56,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-02 16:19:56,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:19:56,842 INFO L422 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, 1, 1, 1] [2020-12-02 16:19:57,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-02 16:19:57,056 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:19:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:19:57,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1202751826, now seen corresponding path program 1 times [2020-12-02 16:19:57,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:19:57,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626470866] [2020-12-02 16:19:57,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-02 16:19:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:19:57,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-02 16:19:57,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:19:58,190 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-02 16:20:03,269 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-02 16:20:07,225 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-02 16:20:15,287 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-02 16:20:23,999 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-02 16:20:34,402 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-02 16:20:46,331 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-02 16:20:46,357 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 16:20:46,359 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-02 16:20:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:20:55,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:21:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:21:43,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626470866] [2020-12-02 16:21:43,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:21:43,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [] total 18 [2020-12-02 16:21:43,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114331242] [2020-12-02 16:21:43,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-02 16:21:43,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:21:43,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-02 16:21:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=258, Unknown=8, NotChecked=0, Total=306 [2020-12-02 16:21:43,305 INFO L87 Difference]: Start difference. First operand 26 states and 25 transitions. Second operand 18 states. [2020-12-02 16:22:12,651 WARN L197 SmtUtils]: Spent 3.45 s on a formula simplification that was a NOOP. DAG size: 34 [2020-12-02 16:22:40,845 WARN L197 SmtUtils]: Spent 2.82 s on a formula simplification that was a NOOP. DAG size: 32 [2020-12-02 16:23:13,461 WARN L197 SmtUtils]: Spent 8.19 s on a formula simplification that was a NOOP. DAG size: 36 [2020-12-02 16:23:55,740 WARN L197 SmtUtils]: Spent 15.35 s on a formula simplification that was a NOOP. DAG size: 40 [2020-12-02 16:24:54,145 WARN L197 SmtUtils]: Spent 16.44 s on a formula simplification that was a NOOP. DAG size: 41 [2020-12-02 16:25:06,622 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-12-02 16:25:06,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-02 16:25:06,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-02 16:25:06,825 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:209) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:226) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:153) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:743) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:206) ... 45 more [2020-12-02 16:25:06,833 INFO L168 Benchmark]: Toolchain (without parser) took 365813.34 ms. Allocated memory was 41.9 MB in the beginning and 62.9 MB in the end (delta: 21.0 MB). Free memory was 20.2 MB in the beginning and 25.6 MB in the end (delta: -5.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 16.1 GB. [2020-12-02 16:25:06,834 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 41.9 MB. Free memory was 26.9 MB in the beginning and 26.9 MB in the end (delta: 27.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:25:06,835 INFO L168 Benchmark]: CACSL2BoogieTranslator took 487.42 ms. Allocated memory was 41.9 MB in the beginning and 52.4 MB in the end (delta: 10.5 MB). Free memory was 19.9 MB in the beginning and 27.0 MB in the end (delta: -7.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-02 16:25:06,836 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.42 ms. Allocated memory is still 52.4 MB. Free memory was 27.0 MB in the beginning and 24.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 16:25:06,837 INFO L168 Benchmark]: Boogie Preprocessor took 123.88 ms. Allocated memory is still 52.4 MB. Free memory was 24.8 MB in the beginning and 34.3 MB in the end (delta: -9.5 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-12-02 16:25:06,838 INFO L168 Benchmark]: RCFGBuilder took 1342.76 ms. Allocated memory is still 52.4 MB. Free memory was 34.3 MB in the beginning and 32.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-02 16:25:06,839 INFO L168 Benchmark]: TraceAbstraction took 363780.09 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 32.3 MB in the beginning and 25.6 MB in the end (delta: 6.7 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2020-12-02 16:25:06,846 INFO L339 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 41.9 MB. Free memory was 26.9 MB in the beginning and 26.9 MB in the end (delta: 27.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 487.42 ms. Allocated memory was 41.9 MB in the beginning and 52.4 MB in the end (delta: 10.5 MB). Free memory was 19.9 MB in the beginning and 27.0 MB in the end (delta: -7.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 71.42 ms. Allocated memory is still 52.4 MB. Free memory was 27.0 MB in the beginning and 24.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 123.88 ms. Allocated memory is still 52.4 MB. Free memory was 24.8 MB in the beginning and 34.3 MB in the end (delta: -9.5 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1342.76 ms. Allocated memory is still 52.4 MB. Free memory was 34.3 MB in the beginning and 32.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 363780.09 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 32.3 MB in the beginning and 25.6 MB in the end (delta: 6.7 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:209) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...