./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc 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 ../sv-benchmarks/c/float-newlib/float_req_bl_1252b.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 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 ../sv-benchmarks/c/float-newlib/float_req_bl_1252b.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 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-10-24 23:27:01,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:27:01,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:27:01,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:27:01,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:27:01,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:27:01,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:27:01,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:27:01,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:27:01,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:27:01,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:27:01,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:27:01,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:27:01,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:27:01,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:27:01,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:27:01,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:27:01,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:27:01,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:27:01,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:27:01,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:27:01,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:27:01,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:27:01,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:27:01,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:27:01,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:27:01,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:27:01,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:27:01,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:27:01,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:27:01,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:27:01,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:27:01,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:27:01,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:27:01,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:27:01,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:27:01,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:27:01,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:27:01,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:27:01,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:27:01,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:27:01,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-24 23:27:01,408 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:27:01,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:27:01,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:27:01,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:27:01,413 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:27:01,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:27:01,413 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:27:01,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 23:27:01,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:27:01,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:27:01,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:27:01,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:27:01,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:27:01,416 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:27:01,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:27:01,416 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:27:01,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:27:01,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:27:01,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:27:01,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:27:01,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:27:01,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:27:01,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:27:01,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:27:01,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:27:01,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 23:27:01,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 23:27:01,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:27:01,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:27:01,419 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 [2020-10-24 23:27:01,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:27:01,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:27:01,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:27:01,863 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:27:01,864 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:27:01,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2020-10-24 23:27:01,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4585c386a/be178a9b43b347b58a4c6e8b06410c8a/FLAG8fab9ebc7 [2020-10-24 23:27:02,626 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:27:02,627 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2020-10-24 23:27:02,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4585c386a/be178a9b43b347b58a4c6e8b06410c8a/FLAG8fab9ebc7 [2020-10-24 23:27:02,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4585c386a/be178a9b43b347b58a4c6e8b06410c8a [2020-10-24 23:27:02,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:27:03,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:27:03,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:03,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:27:03,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:27:03,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:02" (1/1) ... [2020-10-24 23:27:03,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fa3c0e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:03, skipping insertion in model container [2020-10-24 23:27:03,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:02" (1/1) ... [2020-10-24 23:27:03,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:27:03,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:27:03,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:03,298 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:27:03,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:03,345 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:27:03,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:03 WrapperNode [2020-10-24 23:27:03,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:03,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:03,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:27:03,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:27:03,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:03" (1/1) ... [2020-10-24 23:27:03,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:03" (1/1) ... [2020-10-24 23:27:03,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:03,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:27:03,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:27:03,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:27:03,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:03" (1/1) ... [2020-10-24 23:27:03,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:03" (1/1) ... [2020-10-24 23:27:03,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:03" (1/1) ... [2020-10-24 23:27:03,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:03" (1/1) ... [2020-10-24 23:27:03,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:03" (1/1) ... [2020-10-24 23:27:03,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:03" (1/1) ... [2020-10-24 23:27:03,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:03" (1/1) ... [2020-10-24 23:27:03,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:27:03,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:27:03,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:27:03,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:27:03,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:03" (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 [2020-10-24 23:27:03,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 23:27:03,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:27:03,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-24 23:27:03,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:27:03,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:27:03,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 23:27:03,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 23:27:04,063 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:27:04,063 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-24 23:27:04,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:04 BoogieIcfgContainer [2020-10-24 23:27:04,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:27:04,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:27:04,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:27:04,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:27:04,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:27:02" (1/3) ... [2020-10-24 23:27:04,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d0cab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:04, skipping insertion in model container [2020-10-24 23:27:04,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:03" (2/3) ... [2020-10-24 23:27:04,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d0cab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:04, skipping insertion in model container [2020-10-24 23:27:04,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:04" (3/3) ... [2020-10-24 23:27:04,080 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2020-10-24 23:27:04,094 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:27:04,100 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:27:04,120 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:27:04,169 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:27:04,170 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:27:04,170 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:27:04,170 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:27:04,170 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:27:04,171 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:27:04,171 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:27:04,171 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:27:04,193 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-24 23:27:04,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 23:27:04,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:04,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:04,209 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:04,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:04,216 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-24 23:27:04,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:04,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195735114] [2020-10-24 23:27:04,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:04,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195735114] [2020-10-24 23:27:04,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:04,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 23:27:04,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318675152] [2020-10-24 23:27:04,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:27:04,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:04,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:27:04,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:04,462 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-24 23:27:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:04,487 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-24 23:27:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:27:04,489 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-24 23:27:04,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:04,501 INFO L225 Difference]: With dead ends: 63 [2020-10-24 23:27:04,502 INFO L226 Difference]: Without dead ends: 29 [2020-10-24 23:27:04,505 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 [2020-10-24 23:27:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-24 23:27:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-24 23:27:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-24 23:27:04,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-24 23:27:04,547 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-24 23:27:04,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:04,548 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-24 23:27:04,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:27:04,549 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-24 23:27:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-24 23:27:04,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:04,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:04,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 23:27:04,551 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:04,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:04,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-24 23:27:04,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:04,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195670563] [2020-10-24 23:27:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:04,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195670563] [2020-10-24 23:27:04,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:04,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:27:04,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802404604] [2020-10-24 23:27:04,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:04,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:04,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:04,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:04,670 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-10-24 23:27:04,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:04,765 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-24 23:27:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:27:04,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-24 23:27:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:04,767 INFO L225 Difference]: With dead ends: 53 [2020-10-24 23:27:04,768 INFO L226 Difference]: Without dead ends: 44 [2020-10-24 23:27:04,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-24 23:27:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-10-24 23:27:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 23:27:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-24 23:27:04,777 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-24 23:27:04,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:04,778 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-24 23:27:04,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:04,778 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-24 23:27:04,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-24 23:27:04,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:04,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:04,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 23:27:04,780 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:04,781 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-10-24 23:27:04,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:04,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632805291] [2020-10-24 23:27:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:04,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632805291] [2020-10-24 23:27:04,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:04,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:27:04,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361717752] [2020-10-24 23:27:04,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:04,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:04,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:04,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:04,852 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-24 23:27:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:04,954 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-24 23:27:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:27:04,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-24 23:27:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:04,957 INFO L225 Difference]: With dead ends: 55 [2020-10-24 23:27:04,957 INFO L226 Difference]: Without dead ends: 46 [2020-10-24 23:27:04,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:04,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-24 23:27:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-24 23:27:04,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 23:27:04,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-24 23:27:04,965 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-10-24 23:27:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:04,966 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-24 23:27:04,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:04,966 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-24 23:27:04,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-24 23:27:04,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:04,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:04,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 23:27:04,968 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:04,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:04,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-10-24 23:27:04,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:04,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762138528] [2020-10-24 23:27:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:05,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762138528] [2020-10-24 23:27:05,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:05,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:27:05,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889188370] [2020-10-24 23:27:05,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:05,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:05,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:05,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:05,068 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-24 23:27:05,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:05,182 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-10-24 23:27:05,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:27:05,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-24 23:27:05,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:05,185 INFO L225 Difference]: With dead ends: 57 [2020-10-24 23:27:05,185 INFO L226 Difference]: Without dead ends: 48 [2020-10-24 23:27:05,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:05,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-24 23:27:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-10-24 23:27:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 23:27:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-24 23:27:05,192 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-10-24 23:27:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:05,193 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-24 23:27:05,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-24 23:27:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:27:05,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:05,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:05,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 23:27:05,195 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:05,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:05,196 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-10-24 23:27:05,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:05,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073620554] [2020-10-24 23:27:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:05,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073620554] [2020-10-24 23:27:05,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:05,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:27:05,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161264460] [2020-10-24 23:27:05,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:05,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:05,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:05,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:05,244 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-24 23:27:05,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:05,318 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-24 23:27:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:27:05,318 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-24 23:27:05,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:05,319 INFO L225 Difference]: With dead ends: 55 [2020-10-24 23:27:05,319 INFO L226 Difference]: Without dead ends: 46 [2020-10-24 23:27:05,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:05,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-24 23:27:05,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-24 23:27:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 23:27:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-24 23:27:05,326 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-10-24 23:27:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:05,327 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-24 23:27:05,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-24 23:27:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:27:05,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:05,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:05,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 23:27:05,329 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-24 23:27:05,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:05,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964308792] [2020-10-24 23:27:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:27:05,360 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:27:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:27:05,382 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:27:05,408 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 23:27:05,409 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 23:27:05,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 23:27:05,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:27:05 BoogieIcfgContainer [2020-10-24 23:27:05,463 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:27:05,464 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:27:05,465 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:27:05,465 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:27:05,466 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:04" (3/4) ... [2020-10-24 23:27:05,470 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 23:27:05,470 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:27:05,474 INFO L168 Benchmark]: Toolchain (without parser) took 2471.05 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.9 MB in the beginning and 41.1 MB in the end (delta: -9.2 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:05,477 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 54.5 MB. Free memory was 32.4 MB in the beginning and 32.3 MB in the end (delta: 39.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:05,479 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.49 ms. Allocated memory is still 54.5 MB. Free memory was 31.3 MB in the beginning and 34.2 MB in the end (delta: -3.0 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:05,481 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.27 ms. Allocated memory is still 54.5 MB. Free memory was 34.2 MB in the beginning and 32.6 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:05,486 INFO L168 Benchmark]: Boogie Preprocessor took 32.52 ms. Allocated memory is still 54.5 MB. Free memory was 32.4 MB in the beginning and 31.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:05,488 INFO L168 Benchmark]: RCFGBuilder took 629.44 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.9 MB in the beginning and 41.5 MB in the end (delta: -10.6 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:05,490 INFO L168 Benchmark]: TraceAbstraction took 1392.95 ms. Allocated memory is still 67.1 MB. Free memory was 41.0 MB in the beginning and 41.6 MB in the end (delta: -553.6 kB). Peak memory consumption was 957.1 kB. Max. memory is 16.1 GB. [2020-10-24 23:27:05,493 INFO L168 Benchmark]: Witness Printer took 5.75 ms. Allocated memory is still 67.1 MB. Free memory was 41.6 MB in the beginning and 41.1 MB in the end (delta: 447.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:05,506 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 54.5 MB. Free memory was 32.4 MB in the beginning and 32.3 MB in the end (delta: 39.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 336.49 ms. Allocated memory is still 54.5 MB. Free memory was 31.3 MB in the beginning and 34.2 MB in the end (delta: -3.0 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.27 ms. Allocated memory is still 54.5 MB. Free memory was 34.2 MB in the beginning and 32.6 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.52 ms. Allocated memory is still 54.5 MB. Free memory was 32.4 MB in the beginning and 31.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 629.44 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.9 MB in the beginning and 41.5 MB in the end (delta: -10.6 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1392.95 ms. Allocated memory is still 67.1 MB. Free memory was 41.0 MB in the beginning and 41.6 MB in the end (delta: -553.6 kB). Peak memory consumption was 957.1 kB. Max. memory is 16.1 GB. * Witness Printer took 5.75 ms. Allocated memory is still 67.1 MB. Free memory was 41.6 MB in the beginning and 41.1 MB in the end (delta: 447.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 80, overapproximation of someUnaryFLOAToperation at line 76. Possible FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L3] __assert_fail("0", "float_req_bl_1252b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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-a4ecdab [2020-10-24 23:27:08,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:27:08,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:27:08,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:27:08,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:27:08,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:27:08,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:27:08,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:27:08,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:27:08,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:27:08,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:27:08,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:27:08,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:27:08,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:27:08,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:27:08,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:27:08,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:27:08,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:27:08,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:27:08,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:27:08,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:27:08,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:27:08,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:27:08,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:27:08,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:27:08,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:27:08,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:27:08,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:27:08,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:27:08,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:27:08,092 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:27:08,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:27:08,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:27:08,095 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:27:08,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:27:08,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:27:08,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:27:08,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:27:08,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:27:08,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:27:08,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:27:08,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-24 23:27:08,139 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:27:08,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:27:08,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:27:08,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:27:08,143 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:27:08,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:27:08,144 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:27:08,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:27:08,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:27:08,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:27:08,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:27:08,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:27:08,146 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 23:27:08,146 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 23:27:08,146 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:27:08,147 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:27:08,147 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:27:08,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:27:08,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:27:08,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:27:08,148 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:27:08,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:27:08,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:27:08,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:27:08,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:27:08,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:27:08,150 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 23:27:08,150 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 23:27:08,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:27:08,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:27:08,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 23:27:08,152 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 [2020-10-24 23:27:08,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:27:08,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:27:08,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:27:08,613 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:27:08,614 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:27:08,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2020-10-24 23:27:08,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b8e67b4d/a10d94d278e544028b6ff6606a909fa5/FLAG1710b437b [2020-10-24 23:27:09,322 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:27:09,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2020-10-24 23:27:09,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b8e67b4d/a10d94d278e544028b6ff6606a909fa5/FLAG1710b437b [2020-10-24 23:27:09,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b8e67b4d/a10d94d278e544028b6ff6606a909fa5 [2020-10-24 23:27:09,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:27:09,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:27:09,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:09,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:27:09,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:27:09,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:09" (1/1) ... [2020-10-24 23:27:09,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4583e507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:09, skipping insertion in model container [2020-10-24 23:27:09,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:09" (1/1) ... [2020-10-24 23:27:09,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:27:09,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:27:09,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:09,933 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:27:09,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:09,982 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:27:09,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:09 WrapperNode [2020-10-24 23:27:09,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:09,984 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:09,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:27:09,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:27:09,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:09" (1/1) ... [2020-10-24 23:27:10,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:09" (1/1) ... [2020-10-24 23:27:10,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:10,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:27:10,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:27:10,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:27:10,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:09" (1/1) ... [2020-10-24 23:27:10,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:09" (1/1) ... [2020-10-24 23:27:10,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:09" (1/1) ... [2020-10-24 23:27:10,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:09" (1/1) ... [2020-10-24 23:27:10,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:09" (1/1) ... [2020-10-24 23:27:10,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:09" (1/1) ... [2020-10-24 23:27:10,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:09" (1/1) ... [2020-10-24 23:27:10,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:27:10,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:27:10,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:27:10,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:27:10,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:09" (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 [2020-10-24 23:27:10,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 23:27:10,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:27:10,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-24 23:27:10,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:27:10,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:27:10,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-10-24 23:27:10,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 23:27:10,554 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:27:10,554 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-24 23:27:10,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:10 BoogieIcfgContainer [2020-10-24 23:27:10,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:27:10,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:27:10,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:27:10,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:27:10,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:27:09" (1/3) ... [2020-10-24 23:27:10,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@349a66b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:10, skipping insertion in model container [2020-10-24 23:27:10,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:09" (2/3) ... [2020-10-24 23:27:10,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@349a66b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:10, skipping insertion in model container [2020-10-24 23:27:10,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:10" (3/3) ... [2020-10-24 23:27:10,568 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2020-10-24 23:27:10,583 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:27:10,590 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:27:10,609 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:27:10,654 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:27:10,655 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:27:10,655 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:27:10,655 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:27:10,656 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:27:10,656 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:27:10,656 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:27:10,656 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:27:10,676 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-24 23:27:10,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 23:27:10,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:10,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:10,684 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:10,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:10,693 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-24 23:27:10,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:10,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79574415] [2020-10-24 23:27:10,716 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 [2020-10-24 23:27:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:10,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 23:27:10,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:10,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:10,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79574415] [2020-10-24 23:27:10,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:10,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 23:27:10,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814450868] [2020-10-24 23:27:10,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:27:10,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:10,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:27:10,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:10,912 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-24 23:27:10,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:10,933 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-24 23:27:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:27:10,935 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-24 23:27:10,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:10,953 INFO L225 Difference]: With dead ends: 63 [2020-10-24 23:27:10,953 INFO L226 Difference]: Without dead ends: 29 [2020-10-24 23:27:10,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:10,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-24 23:27:11,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-24 23:27:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-24 23:27:11,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-24 23:27:11,019 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-24 23:27:11,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:11,019 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-24 23:27:11,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:27:11,020 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-24 23:27:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-24 23:27:11,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:11,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:11,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 23:27:11,225 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:11,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:11,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-24 23:27:11,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:11,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762685090] [2020-10-24 23:27:11,228 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 [2020-10-24 23:27:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:11,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 23:27:11,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:11,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:11,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762685090] [2020-10-24 23:27:11,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:11,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-24 23:27:11,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844518548] [2020-10-24 23:27:11,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 23:27:11,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:11,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 23:27:11,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 23:27:11,422 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-10-24 23:27:11,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:11,557 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-10-24 23:27:11,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:27:11,558 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-24 23:27:11,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:11,560 INFO L225 Difference]: With dead ends: 68 [2020-10-24 23:27:11,560 INFO L226 Difference]: Without dead ends: 59 [2020-10-24 23:27:11,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-24 23:27:11,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-24 23:27:11,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-10-24 23:27:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 23:27:11,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-24 23:27:11,572 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-24 23:27:11,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:11,573 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-24 23:27:11,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 23:27:11,573 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-24 23:27:11,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:27:11,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:11,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:11,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 23:27:11,788 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:11,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:11,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-24 23:27:11,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:11,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085214108] [2020-10-24 23:27:11,792 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 [2020-10-24 23:27:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:11,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-24 23:27:11,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:11,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:11,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085214108] [2020-10-24 23:27:11,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:11,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-10-24 23:27:11,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354189448] [2020-10-24 23:27:11,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:11,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:11,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:11,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:11,938 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-24 23:27:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:11,994 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-24 23:27:11,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:27:11,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-24 23:27:11,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:11,996 INFO L225 Difference]: With dead ends: 52 [2020-10-24 23:27:11,996 INFO L226 Difference]: Without dead ends: 26 [2020-10-24 23:27:11,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:11,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-24 23:27:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-24 23:27:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-24 23:27:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-24 23:27:12,003 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-10-24 23:27:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:12,003 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-24 23:27:12,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-24 23:27:12,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-24 23:27:12,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:12,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:12,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-24 23:27:12,222 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:12,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:12,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-10-24 23:27:12,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:12,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372383309] [2020-10-24 23:27:12,225 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 [2020-10-24 23:27:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:12,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 23:27:12,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:12,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:12,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372383309] [2020-10-24 23:27:12,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:12,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-24 23:27:12,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384295904] [2020-10-24 23:27:12,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 23:27:12,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:12,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 23:27:12,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 23:27:12,356 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-10-24 23:27:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:12,438 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-24 23:27:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:27:12,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-24 23:27:12,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:12,440 INFO L225 Difference]: With dead ends: 61 [2020-10-24 23:27:12,440 INFO L226 Difference]: Without dead ends: 52 [2020-10-24 23:27:12,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-24 23:27:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-24 23:27:12,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2020-10-24 23:27:12,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-24 23:27:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-24 23:27:12,447 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-10-24 23:27:12,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:12,448 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-24 23:27:12,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 23:27:12,448 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-10-24 23:27:12,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-24 23:27:12,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:12,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:12,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-24 23:27:12,664 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:12,666 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-10-24 23:27:12,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:12,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361828681] [2020-10-24 23:27:12,667 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 [2020-10-24 23:27:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:12,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-24 23:27:12,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:12,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:12,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361828681] [2020-10-24 23:27:12,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:12,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-24 23:27:12,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293963275] [2020-10-24 23:27:12,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:12,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:12,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:12,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:12,830 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-10-24 23:27:12,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:12,845 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-24 23:27:12,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 23:27:12,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-24 23:27:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:12,847 INFO L225 Difference]: With dead ends: 38 [2020-10-24 23:27:12,847 INFO L226 Difference]: Without dead ends: 28 [2020-10-24 23:27:12,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:12,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-24 23:27:12,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-24 23:27:12,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-24 23:27:12,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-24 23:27:12,854 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-10-24 23:27:12,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:12,854 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-24 23:27:12,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-24 23:27:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-24 23:27:12,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:12,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:13,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-24 23:27:13,072 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:13,074 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-10-24 23:27:13,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:13,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108979990] [2020-10-24 23:27:13,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:13,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-24 23:27:13,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:13,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:13,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108979990] [2020-10-24 23:27:13,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:13,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-24 23:27:13,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980991241] [2020-10-24 23:27:13,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 23:27:13,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:13,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 23:27:13,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-24 23:27:13,281 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-10-24 23:27:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:13,404 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-24 23:27:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 23:27:13,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-24 23:27:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:13,406 INFO L225 Difference]: With dead ends: 40 [2020-10-24 23:27:13,406 INFO L226 Difference]: Without dead ends: 37 [2020-10-24 23:27:13,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-24 23:27:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-24 23:27:13,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-10-24 23:27:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-24 23:27:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-24 23:27:13,413 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-10-24 23:27:13,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:13,414 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-24 23:27:13,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 23:27:13,414 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-24 23:27:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-24 23:27:13,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:13,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:13,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-24 23:27:13,633 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:13,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:13,634 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-10-24 23:27:13,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:13,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439282591] [2020-10-24 23:27:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:13,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-24 23:27:13,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:13,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:13,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439282591] [2020-10-24 23:27:13,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:13,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-24 23:27:13,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390415410] [2020-10-24 23:27:13,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 23:27:13,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:13,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 23:27:13,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:13,803 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-10-24 23:27:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:13,870 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-24 23:27:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 23:27:13,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-24 23:27:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:13,872 INFO L225 Difference]: With dead ends: 43 [2020-10-24 23:27:13,872 INFO L226 Difference]: Without dead ends: 23 [2020-10-24 23:27:13,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-24 23:27:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-24 23:27:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-24 23:27:13,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-24 23:27:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-10-24 23:27:13,877 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2020-10-24 23:27:13,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:13,878 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-10-24 23:27:13,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 23:27:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-10-24 23:27:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-24 23:27:13,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:13,879 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] [2020-10-24 23:27:14,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-24 23:27:14,094 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:14,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-10-24 23:27:14,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:14,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061776982] [2020-10-24 23:27:14,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:27:14,245 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:27:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:27:14,379 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:27:14,437 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-24 23:27:14,437 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 23:27:14,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-24 23:27:14,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:27:14 BoogieIcfgContainer [2020-10-24 23:27:14,697 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:27:14,697 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:27:14,698 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:27:14,698 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:27:14,699 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:10" (3/4) ... [2020-10-24 23:27:14,701 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-24 23:27:14,776 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 23:27:14,778 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:27:14,781 INFO L168 Benchmark]: Toolchain (without parser) took 5139.14 ms. Allocated memory was 39.8 MB in the beginning and 67.1 MB in the end (delta: 27.3 MB). Free memory was 15.9 MB in the beginning and 47.9 MB in the end (delta: -32.0 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:14,784 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 39.8 MB. Free memory was 24.9 MB in the beginning and 24.9 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:14,785 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.82 ms. Allocated memory was 39.8 MB in the beginning and 54.5 MB in the end (delta: 14.7 MB). Free memory was 15.3 MB in the beginning and 28.2 MB in the end (delta: -13.0 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:14,787 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.42 ms. Allocated memory is still 54.5 MB. Free memory was 28.2 MB in the beginning and 26.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:14,791 INFO L168 Benchmark]: Boogie Preprocessor took 44.16 ms. Allocated memory is still 54.5 MB. Free memory was 26.3 MB in the beginning and 24.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:14,791 INFO L168 Benchmark]: RCFGBuilder took 473.21 ms. Allocated memory is still 54.5 MB. Free memory was 24.8 MB in the beginning and 32.4 MB in the end (delta: -7.6 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:14,792 INFO L168 Benchmark]: TraceAbstraction took 4138.17 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 32.0 MB in the beginning and 24.7 MB in the end (delta: 7.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:14,793 INFO L168 Benchmark]: Witness Printer took 80.84 ms. Allocated memory is still 67.1 MB. Free memory was 24.7 MB in the beginning and 47.9 MB in the end (delta: -23.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:14,797 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 39.8 MB. Free memory was 24.9 MB in the beginning and 24.9 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 332.82 ms. Allocated memory was 39.8 MB in the beginning and 54.5 MB in the end (delta: 14.7 MB). Free memory was 15.3 MB in the beginning and 28.2 MB in the end (delta: -13.0 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.42 ms. Allocated memory is still 54.5 MB. Free memory was 28.2 MB in the beginning and 26.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.16 ms. Allocated memory is still 54.5 MB. Free memory was 26.3 MB in the beginning and 24.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 473.21 ms. Allocated memory is still 54.5 MB. Free memory was 24.8 MB in the beginning and 32.4 MB in the end (delta: -7.6 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4138.17 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 32.0 MB in the beginning and 24.7 MB in the end (delta: 7.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. * Witness Printer took 80.84 ms. Allocated memory is still 67.1 MB. Free memory was 24.7 MB in the beginning and 47.9 MB in the end (delta: -23.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; [L46] COND FALSE !(__fpclassify_float(x) == 0) [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; [L50] COND FALSE !(__fpclassify_float(y) == 0) [L53] EXPR x > y ? x : y [L53] return x > y ? x : y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L57] __uint32_t w; [L60] ieee_float_shape_type gf_u; [L61] gf_u.value = (x) [L62] EXPR gf_u.word [L62] (w) = gf_u.word [L65] return (w & 0x80000000) != 0; [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L3] __assert_fail("0", "float_req_bl_1252b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.9s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 175 SDslu, 301 SDs, 0 SdLazy, 100 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 7973 SizeOfPredicates, 27 NumberOfNonLiveVariables, 433 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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 proved your program to be incorrect! Received shutdown request...