./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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_1252a.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 7f8d72d06ca136037e1a4f2d3dda81b71758b03c ................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_1252a.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 7f8d72d06ca136037e1a4f2d3dda81b71758b03c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 22:01:20,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:01:20,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:01:20,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:01:20,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:01:20,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:01:20,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:01:20,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:01:20,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:01:20,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:01:20,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:01:20,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:01:20,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:01:20,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:01:20,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:01:20,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:01:20,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:01:20,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:01:20,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:01:20,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:01:20,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:01:20,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:01:20,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:01:20,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:01:20,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:01:20,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:01:20,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:01:20,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:01:20,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:01:20,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:01:20,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:01:20,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:01:20,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:01:20,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:01:20,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:01:20,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:01:20,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:01:20,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:01:20,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:01:20,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:01:20,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:01:20,294 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:01:20,347 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:01:20,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:01:20,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:01:20,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:01:20,362 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:01:20,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:01:20,362 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:01:20,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:01:20,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:01:20,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:01:20,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:01:20,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:01:20,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:01:20,364 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:01:20,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:01:20,365 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:01:20,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:01:20,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:01:20,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:01:20,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:01:20,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:01:20,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:01:20,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:01:20,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:01:20,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:01:20,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:01:20,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:01:20,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:01:20,368 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:01:20,368 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f8d72d06ca136037e1a4f2d3dda81b71758b03c [2020-10-25 22:01:20,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:01:20,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:01:20,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:01:20,818 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:01:20,820 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:01:20,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2020-10-25 22:01:20,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8401b98a6/41d6547cbee14c6d8e3facd08aa10ca5/FLAGf121980f4 [2020-10-25 22:01:21,544 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:01:21,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2020-10-25 22:01:21,555 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8401b98a6/41d6547cbee14c6d8e3facd08aa10ca5/FLAGf121980f4 [2020-10-25 22:01:21,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8401b98a6/41d6547cbee14c6d8e3facd08aa10ca5 [2020-10-25 22:01:21,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:01:21,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:01:21,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:01:21,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:01:21,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:01:22,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:01:21" (1/1) ... [2020-10-25 22:01:22,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54fd0744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:22, skipping insertion in model container [2020-10-25 22:01:22,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:01:21" (1/1) ... [2020-10-25 22:01:22,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:01:22,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:01:22,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:01:22,343 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:01:22,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:01:22,394 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:01:22,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:22 WrapperNode [2020-10-25 22:01:22,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:01:22,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:01:22,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:01:22,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:01:22,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:22" (1/1) ... [2020-10-25 22:01:22,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:22" (1/1) ... [2020-10-25 22:01:22,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:01:22,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:01:22,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:01:22,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:01:22,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:22" (1/1) ... [2020-10-25 22:01:22,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:22" (1/1) ... [2020-10-25 22:01:22,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:22" (1/1) ... [2020-10-25 22:01:22,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:22" (1/1) ... [2020-10-25 22:01:22,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:22" (1/1) ... [2020-10-25 22:01:22,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:22" (1/1) ... [2020-10-25 22:01:22,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:22" (1/1) ... [2020-10-25 22:01:22,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:01:22,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:01:22,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:01:22,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:01:22,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:22" (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 [2020-10-25 22:01:22,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:01:22,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:01:22,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-25 22:01:22,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:01:22,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:01:22,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 22:01:22,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 22:01:23,057 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:01:23,057 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-25 22:01:23,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:23 BoogieIcfgContainer [2020-10-25 22:01:23,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:01:23,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:01:23,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:01:23,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:01:23,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:01:21" (1/3) ... [2020-10-25 22:01:23,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263fc7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:01:23, skipping insertion in model container [2020-10-25 22:01:23,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:22" (2/3) ... [2020-10-25 22:01:23,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263fc7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:01:23, skipping insertion in model container [2020-10-25 22:01:23,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:23" (3/3) ... [2020-10-25 22:01:23,071 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2020-10-25 22:01:23,087 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:01:23,092 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:01:23,106 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:01:23,150 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:01:23,150 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:01:23,150 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:01:23,151 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:01:23,151 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:01:23,152 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:01:23,152 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:01:23,152 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:01:23,171 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-25 22:01:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-25 22:01:23,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:23,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:23,179 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:23,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:23,187 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-25 22:01:23,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:01:23,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430716377] [2020-10-25 22:01:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:01:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:23,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430716377] [2020-10-25 22:01:23,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:23,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 22:01:23,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028660449] [2020-10-25 22:01:23,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:01:23,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:01:23,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:01:23,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:01:23,441 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-25 22:01:23,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:23,467 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-25 22:01:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:01:23,468 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-25 22:01:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:23,480 INFO L225 Difference]: With dead ends: 63 [2020-10-25 22:01:23,480 INFO L226 Difference]: Without dead ends: 29 [2020-10-25 22:01:23,485 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 [2020-10-25 22:01:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-25 22:01:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-25 22:01:23,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-25 22:01:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-25 22:01:23,529 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-25 22:01:23,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:23,530 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-25 22:01:23,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:01:23,530 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-25 22:01:23,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 22:01:23,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:23,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:23,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:01:23,532 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:23,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:23,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-25 22:01:23,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:01:23,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237066909] [2020-10-25 22:01:23,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:01:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:23,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237066909] [2020-10-25 22:01:23,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:23,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 22:01:23,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321837656] [2020-10-25 22:01:23,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:01:23,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:01:23,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:01:23,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:01:23,647 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-10-25 22:01:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:23,724 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-25 22:01:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:01:23,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-25 22:01:23,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:23,726 INFO L225 Difference]: With dead ends: 53 [2020-10-25 22:01:23,726 INFO L226 Difference]: Without dead ends: 44 [2020-10-25 22:01:23,727 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 [2020-10-25 22:01:23,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-25 22:01:23,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-10-25 22:01:23,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-25 22:01:23,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-25 22:01:23,735 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-25 22:01:23,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:23,735 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-25 22:01:23,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:01:23,736 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-25 22:01:23,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-25 22:01:23,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:23,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:23,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:01:23,737 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:23,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:23,738 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-10-25 22:01:23,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:01:23,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564797] [2020-10-25 22:01:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:01:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:23,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564797] [2020-10-25 22:01:23,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:23,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 22:01:23,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426633137] [2020-10-25 22:01:23,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:01:23,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:01:23,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:01:23,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:01:23,839 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-25 22:01:23,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:23,905 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-25 22:01:23,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:01:23,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-25 22:01:23,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:23,907 INFO L225 Difference]: With dead ends: 55 [2020-10-25 22:01:23,907 INFO L226 Difference]: Without dead ends: 46 [2020-10-25 22:01:23,908 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 [2020-10-25 22:01:23,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-25 22:01:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-25 22:01:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-25 22:01:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-25 22:01:23,915 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-10-25 22:01:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:23,915 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-25 22:01:23,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:01:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-25 22:01:23,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-25 22:01:23,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:23,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:23,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 22:01:23,918 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:23,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:23,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-10-25 22:01:23,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:01:23,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671077501] [2020-10-25 22:01:23,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:01:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:24,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671077501] [2020-10-25 22:01:24,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:24,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 22:01:24,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027026176] [2020-10-25 22:01:24,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:01:24,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:01:24,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:01:24,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:01:24,006 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-25 22:01:24,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:24,055 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-10-25 22:01:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:01:24,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-25 22:01:24,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:24,057 INFO L225 Difference]: With dead ends: 57 [2020-10-25 22:01:24,057 INFO L226 Difference]: Without dead ends: 48 [2020-10-25 22:01:24,058 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 [2020-10-25 22:01:24,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-25 22:01:24,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-10-25 22:01:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-25 22:01:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-25 22:01:24,064 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-10-25 22:01:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:24,064 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-25 22:01:24,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:01:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-25 22:01:24,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-25 22:01:24,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:24,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:24,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-25 22:01:24,066 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:24,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:24,067 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-10-25 22:01:24,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:01:24,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240111738] [2020-10-25 22:01:24,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:01:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:24,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240111738] [2020-10-25 22:01:24,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:24,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 22:01:24,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515214840] [2020-10-25 22:01:24,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:01:24,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:01:24,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:01:24,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:01:24,112 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-25 22:01:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:24,174 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-25 22:01:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:01:24,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-25 22:01:24,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:24,176 INFO L225 Difference]: With dead ends: 55 [2020-10-25 22:01:24,176 INFO L226 Difference]: Without dead ends: 46 [2020-10-25 22:01:24,177 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 [2020-10-25 22:01:24,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-25 22:01:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-25 22:01:24,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-25 22:01:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-25 22:01:24,184 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-10-25 22:01:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:24,184 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-25 22:01:24,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:01:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-25 22:01:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-25 22:01:24,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:24,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:24,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-25 22:01:24,191 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:24,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:24,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-25 22:01:24,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:01:24,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800016233] [2020-10-25 22:01:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:01:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:01:24,247 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:01:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:01:24,292 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:01:24,349 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 22:01:24,350 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:01:24,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-25 22:01:24,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:01:24 BoogieIcfgContainer [2020-10-25 22:01:24,384 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:01:24,385 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:01:24,385 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:01:24,385 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:01:24,386 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:23" (3/4) ... [2020-10-25 22:01:24,389 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-25 22:01:24,389 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:01:24,392 INFO L168 Benchmark]: Toolchain (without parser) took 2424.25 ms. Allocated memory was 46.1 MB in the beginning and 69.2 MB in the end (delta: 23.1 MB). Free memory was 23.4 MB in the beginning and 40.9 MB in the end (delta: -17.5 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:24,393 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 46.1 MB. Free memory was 29.1 MB in the beginning and 29.1 MB in the end (delta: 31.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:01:24,394 INFO L168 Benchmark]: CACSL2BoogieTranslator took 417.74 ms. Allocated memory is still 46.1 MB. Free memory was 22.8 MB in the beginning and 21.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:24,395 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.99 ms. Allocated memory is still 46.1 MB. Free memory was 21.7 MB in the beginning and 19.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:24,396 INFO L168 Benchmark]: Boogie Preprocessor took 41.52 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 19.9 MB in the beginning and 40.9 MB in the end (delta: -20.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:24,397 INFO L168 Benchmark]: RCFGBuilder took 573.07 ms. Allocated memory is still 56.6 MB. Free memory was 40.7 MB in the beginning and 35.0 MB in the end (delta: 5.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:24,398 INFO L168 Benchmark]: TraceAbstraction took 1321.24 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 34.7 MB in the beginning and 41.3 MB in the end (delta: -6.6 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:24,399 INFO L168 Benchmark]: Witness Printer took 4.98 ms. Allocated memory is still 69.2 MB. Free memory was 41.3 MB in the beginning and 40.9 MB in the end (delta: 428.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:01:24,405 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 46.1 MB. Free memory was 29.1 MB in the beginning and 29.1 MB in the end (delta: 31.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 417.74 ms. Allocated memory is still 46.1 MB. Free memory was 22.8 MB in the beginning and 21.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.99 ms. Allocated memory is still 46.1 MB. Free memory was 21.7 MB in the beginning and 19.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.52 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 19.9 MB in the beginning and 40.9 MB in the end (delta: -20.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * RCFGBuilder took 573.07 ms. Allocated memory is still 56.6 MB. Free memory was 40.7 MB in the beginning and 35.0 MB in the end (delta: 5.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1321.24 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 34.7 MB in the beginning and 41.3 MB in the end (delta: -6.6 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.98 ms. Allocated memory is still 69.2 MB. Free memory was 41.3 MB in the beginning and 40.9 MB in the end (delta: 428.4 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 74. Possible FailurePath: [L74] float x = -0.0f; [L75] float y = 0.0f; [L22] __uint32_t w; [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (w) = gf_u.word [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; [L45] COND TRUE __fpclassify_float(x) == 0 [L46] 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_1252a.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: 0.3s, 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, 0.1s 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 0.2.0-5485861 [2020-10-25 22:01:26,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:01:26,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:01:26,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:01:26,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:01:27,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:01:27,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:01:27,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:01:27,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:01:27,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:01:27,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:01:27,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:01:27,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:01:27,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:01:27,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:01:27,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:01:27,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:01:27,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:01:27,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:01:27,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:01:27,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:01:27,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:01:27,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:01:27,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:01:27,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:01:27,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:01:27,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:01:27,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:01:27,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:01:27,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:01:27,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:01:27,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:01:27,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:01:27,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:01:27,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:01:27,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:01:27,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:01:27,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:01:27,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:01:27,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:01:27,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:01:27,097 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-25 22:01:27,155 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:01:27,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:01:27,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:01:27,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:01:27,160 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:01:27,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:01:27,160 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:01:27,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:01:27,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:01:27,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:01:27,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:01:27,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:01:27,163 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-25 22:01:27,163 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-25 22:01:27,164 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:01:27,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:01:27,164 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:01:27,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:01:27,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:01:27,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:01:27,166 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:01:27,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:01:27,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:01:27,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:01:27,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:01:27,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:01:27,167 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-25 22:01:27,167 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-25 22:01:27,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:01:27,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:01:27,168 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-25 22:01:27,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f8d72d06ca136037e1a4f2d3dda81b71758b03c [2020-10-25 22:01:27,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:01:27,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:01:27,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:01:27,662 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:01:27,663 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:01:27,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2020-10-25 22:01:27,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54da2a6c3/c356783abab74ebf84cf27c17108aaf3/FLAG7f1d08be3 [2020-10-25 22:01:28,446 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:01:28,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2020-10-25 22:01:28,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54da2a6c3/c356783abab74ebf84cf27c17108aaf3/FLAG7f1d08be3 [2020-10-25 22:01:28,778 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54da2a6c3/c356783abab74ebf84cf27c17108aaf3 [2020-10-25 22:01:28,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:01:28,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:01:28,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:01:28,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:01:28,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:01:28,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:01:28" (1/1) ... [2020-10-25 22:01:28,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a0f800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:28, skipping insertion in model container [2020-10-25 22:01:28,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:01:28" (1/1) ... [2020-10-25 22:01:28,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:01:28,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:01:29,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:01:29,112 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:01:29,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:01:29,163 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:01:29,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:29 WrapperNode [2020-10-25 22:01:29,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:01:29,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:01:29,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:01:29,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:01:29,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:29" (1/1) ... [2020-10-25 22:01:29,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:29" (1/1) ... [2020-10-25 22:01:29,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:01:29,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:01:29,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:01:29,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:01:29,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:29" (1/1) ... [2020-10-25 22:01:29,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:29" (1/1) ... [2020-10-25 22:01:29,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:29" (1/1) ... [2020-10-25 22:01:29,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:29" (1/1) ... [2020-10-25 22:01:29,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:29" (1/1) ... [2020-10-25 22:01:29,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:29" (1/1) ... [2020-10-25 22:01:29,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:29" (1/1) ... [2020-10-25 22:01:29,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:01:29,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:01:29,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:01:29,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:01:29,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:29" (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 [2020-10-25 22:01:29,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-25 22:01:29,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:01:29,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-25 22:01:29,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:01:29,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:01:29,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-10-25 22:01:29,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 22:01:29,936 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:01:29,937 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-25 22:01:29,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:29 BoogieIcfgContainer [2020-10-25 22:01:29,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:01:29,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:01:29,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:01:29,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:01:29,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:01:28" (1/3) ... [2020-10-25 22:01:29,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bd0c23d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:01:29, skipping insertion in model container [2020-10-25 22:01:29,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:29" (2/3) ... [2020-10-25 22:01:29,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bd0c23d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:01:29, skipping insertion in model container [2020-10-25 22:01:29,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:29" (3/3) ... [2020-10-25 22:01:29,951 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2020-10-25 22:01:29,966 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:01:29,972 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:01:29,992 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:01:30,037 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:01:30,039 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:01:30,039 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:01:30,039 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:01:30,039 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:01:30,039 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:01:30,040 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:01:30,040 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:01:30,057 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-25 22:01:30,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-25 22:01:30,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:30,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:30,066 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:30,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:30,074 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-25 22:01:30,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:30,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107556872] [2020-10-25 22:01:30,092 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 [2020-10-25 22:01:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:30,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-25 22:01:30,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:30,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:30,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107556872] [2020-10-25 22:01:30,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:30,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-25 22:01:30,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527644357] [2020-10-25 22:01:30,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:01:30,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:01:30,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:01:30,315 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-25 22:01:30,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:30,338 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-25 22:01:30,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:01:30,339 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-25 22:01:30,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:30,351 INFO L225 Difference]: With dead ends: 63 [2020-10-25 22:01:30,351 INFO L226 Difference]: Without dead ends: 29 [2020-10-25 22:01:30,355 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 [2020-10-25 22:01:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-25 22:01:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-25 22:01:30,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-25 22:01:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-25 22:01:30,396 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-25 22:01:30,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:30,396 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-25 22:01:30,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:01:30,397 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-25 22:01:30,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 22:01:30,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:30,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:30,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-25 22:01:30,615 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:30,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:30,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-25 22:01:30,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:30,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293039263] [2020-10-25 22:01:30,619 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 [2020-10-25 22:01:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:30,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 22:01:30,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:30,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:30,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293039263] [2020-10-25 22:01:30,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:30,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-25 22:01:30,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448616019] [2020-10-25 22:01:30,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:01:30,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:30,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:01:30,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:01:30,795 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-10-25 22:01:30,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:30,901 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-10-25 22:01:30,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 22:01:30,902 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-25 22:01:30,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:30,904 INFO L225 Difference]: With dead ends: 68 [2020-10-25 22:01:30,904 INFO L226 Difference]: Without dead ends: 59 [2020-10-25 22:01:30,905 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 [2020-10-25 22:01:30,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-25 22:01:30,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-10-25 22:01:30,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-25 22:01:30,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-25 22:01:30,916 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-25 22:01:30,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:30,917 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-25 22:01:30,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:01:30,917 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-25 22:01:30,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-25 22:01:30,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:30,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:31,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-25 22:01:31,132 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:31,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:31,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-25 22:01:31,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:31,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242923809] [2020-10-25 22:01:31,135 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 [2020-10-25 22:01:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:31,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-25 22:01:31,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:31,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:31,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242923809] [2020-10-25 22:01:31,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:31,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-10-25 22:01:31,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992672526] [2020-10-25 22:01:31,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:01:31,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:31,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:01:31,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:01:31,289 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-25 22:01:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:31,356 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-25 22:01:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:01:31,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-25 22:01:31,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:31,358 INFO L225 Difference]: With dead ends: 52 [2020-10-25 22:01:31,358 INFO L226 Difference]: Without dead ends: 26 [2020-10-25 22:01:31,359 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 [2020-10-25 22:01:31,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-25 22:01:31,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-25 22:01:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-25 22:01:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-25 22:01:31,364 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-10-25 22:01:31,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:31,365 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-25 22:01:31,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:01:31,365 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-25 22:01:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-25 22:01:31,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:31,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:31,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-25 22:01:31,580 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:31,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-10-25 22:01:31,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:31,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247621991] [2020-10-25 22:01:31,583 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 [2020-10-25 22:01:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:31,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 22:01:31,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:31,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:31,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247621991] [2020-10-25 22:01:31,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:31,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-25 22:01:31,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968498885] [2020-10-25 22:01:31,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:01:31,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:31,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:01:31,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:01:31,718 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-10-25 22:01:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:31,797 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-25 22:01:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 22:01:31,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-25 22:01:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:31,799 INFO L225 Difference]: With dead ends: 61 [2020-10-25 22:01:31,799 INFO L226 Difference]: Without dead ends: 52 [2020-10-25 22:01:31,800 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 [2020-10-25 22:01:31,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-25 22:01:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2020-10-25 22:01:31,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 22:01:31,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-25 22:01:31,807 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-10-25 22:01:31,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:31,807 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-25 22:01:31,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:01:31,808 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-10-25 22:01:31,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 22:01:31,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:31,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:32,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-25 22:01:32,028 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:32,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:32,029 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-10-25 22:01:32,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:32,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732967202] [2020-10-25 22:01:32,030 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 [2020-10-25 22:01:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:32,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 22:01:32,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:32,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:32,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:32,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732967202] [2020-10-25 22:01:32,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:32,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-25 22:01:32,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406284357] [2020-10-25 22:01:32,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:01:32,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:32,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:01:32,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:01:32,280 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-10-25 22:01:32,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:32,293 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-25 22:01:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:01:32,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-25 22:01:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:32,295 INFO L225 Difference]: With dead ends: 38 [2020-10-25 22:01:32,295 INFO L226 Difference]: Without dead ends: 28 [2020-10-25 22:01:32,296 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 [2020-10-25 22:01:32,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-25 22:01:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-25 22:01:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 22:01:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-25 22:01:32,302 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-10-25 22:01:32,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:32,303 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-25 22:01:32,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:01:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-25 22:01:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 22:01:32,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:32,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:32,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-25 22:01:32,524 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:32,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:32,525 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-10-25 22:01:32,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:32,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323499534] [2020-10-25 22:01:32,527 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 [2020-10-25 22:01:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:32,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-25 22:01:32,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:32,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:32,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323499534] [2020-10-25 22:01:32,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:32,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-25 22:01:32,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986275854] [2020-10-25 22:01:32,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 22:01:32,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:32,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 22:01:32,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:01:32,762 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-10-25 22:01:32,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:32,907 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-25 22:01:32,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 22:01:32,908 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-25 22:01:32,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:32,909 INFO L225 Difference]: With dead ends: 40 [2020-10-25 22:01:32,910 INFO L226 Difference]: Without dead ends: 37 [2020-10-25 22:01:32,910 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 [2020-10-25 22:01:32,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-25 22:01:32,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-10-25 22:01:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-25 22:01:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-25 22:01:32,917 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-10-25 22:01:32,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:32,917 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-25 22:01:32,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 22:01:32,918 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-25 22:01:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 22:01:32,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:32,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:33,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-25 22:01:33,139 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:33,141 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-10-25 22:01:33,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:33,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238100295] [2020-10-25 22:01:33,142 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 [2020-10-25 22:01:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:33,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-25 22:01:33,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:33,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:33,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238100295] [2020-10-25 22:01:33,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:33,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-25 22:01:33,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830385927] [2020-10-25 22:01:33,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 22:01:33,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:33,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 22:01:33,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-25 22:01:33,317 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-10-25 22:01:33,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:33,383 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-25 22:01:33,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:01:33,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-25 22:01:33,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:33,391 INFO L225 Difference]: With dead ends: 43 [2020-10-25 22:01:33,391 INFO L226 Difference]: Without dead ends: 23 [2020-10-25 22:01:33,392 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 [2020-10-25 22:01:33,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-25 22:01:33,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-25 22:01:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-25 22:01:33,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-10-25 22:01:33,400 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2020-10-25 22:01:33,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:33,401 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-10-25 22:01:33,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 22:01:33,402 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-10-25 22:01:33,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-25 22:01:33,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:33,403 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] [2020-10-25 22:01:33,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-25 22:01:33,617 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:33,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-10-25 22:01:33,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:33,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625451172] [2020-10-25 22:01:33,620 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 [2020-10-25 22:01:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:33,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-25 22:01:33,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:33,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:01:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:33,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:34,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625451172] [2020-10-25 22:01:34,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:34,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2020-10-25 22:01:34,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653175535] [2020-10-25 22:01:34,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-25 22:01:34,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:34,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-25 22:01:34,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-25 22:01:34,146 INFO L87 Difference]: Start difference. First operand 23 states and 22 transitions. Second operand 16 states. [2020-10-25 22:01:34,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:34,402 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2020-10-25 22:01:34,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 22:01:34,403 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-10-25 22:01:34,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:34,404 INFO L225 Difference]: With dead ends: 23 [2020-10-25 22:01:34,404 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 22:01:34,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2020-10-25 22:01:34,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 22:01:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 22:01:34,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 22:01:34,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 22:01:34,406 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-10-25 22:01:34,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:34,406 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 22:01:34,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-25 22:01:34,407 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 22:01:34,407 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 22:01:34,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-25 22:01:34,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 22:01:34,854 INFO L277 CegarLoopResult]: At program point L85(lines 67 86) the Hoare annotation is: true [2020-10-25 22:01:34,854 INFO L274 CegarLoopResult]: For program point L52(line 52) no Hoare annotation was computed. [2020-10-25 22:01:34,854 INFO L274 CegarLoopResult]: For program point L52-2(line 52) no Hoare annotation was computed. [2020-10-25 22:01:34,854 INFO L270 CegarLoopResult]: At program point L52-3(lines 44 53) the Hoare annotation is: (and (= (_ +zero 8 24) |ULTIMATE.start_fmax_float_#res|) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2020-10-25 22:01:34,855 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-25 22:01:34,855 INFO L274 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-10-25 22:01:34,855 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 22:01:34,855 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 22:01:34,855 INFO L274 CegarLoopResult]: For program point L45(lines 45 47) no Hoare annotation was computed. [2020-10-25 22:01:34,855 INFO L274 CegarLoopResult]: For program point L38(lines 38 41) no Hoare annotation was computed. [2020-10-25 22:01:34,855 INFO L274 CegarLoopResult]: For program point L38-1(lines 38 41) no Hoare annotation was computed. [2020-10-25 22:01:34,855 INFO L274 CegarLoopResult]: For program point L80(line 80) no Hoare annotation was computed. [2020-10-25 22:01:34,855 INFO L274 CegarLoopResult]: For program point L80-2(lines 80 83) no Hoare annotation was computed. [2020-10-25 22:01:34,856 INFO L270 CegarLoopResult]: At program point L64(lines 55 65) the Hoare annotation is: (and |ULTIMATE.start_main_#t~short16| (= (_ +zero 8 24) ULTIMATE.start_main_~res~0) (= (_ +zero 8 24) |ULTIMATE.start_fmax_float_#res|) (= (_ +zero 8 24) (fp ((_ extract 31 31) ULTIMATE.start___signbit_float_~w~1) ((_ extract 30 23) ULTIMATE.start___signbit_float_~w~1) ((_ extract 22 0) ULTIMATE.start___signbit_float_~w~1))) (= (_ +zero 8 24) ULTIMATE.start___signbit_float_~x) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= |ULTIMATE.start___signbit_float_#res| (_ bv0 32)) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2020-10-25 22:01:34,856 INFO L274 CegarLoopResult]: For program point L32(lines 32 41) no Hoare annotation was computed. [2020-10-25 22:01:34,856 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 22:01:34,856 INFO L274 CegarLoopResult]: For program point L32-1(lines 32 41) no Hoare annotation was computed. [2020-10-25 22:01:34,856 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-25 22:01:34,856 INFO L274 CegarLoopResult]: For program point L24-1(lines 24 28) no Hoare annotation was computed. [2020-10-25 22:01:34,856 INFO L270 CegarLoopResult]: At program point L24-2(lines 24 28) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= ULTIMATE.start___fpclassify_float_~x .cse0) (= ULTIMATE.start_fmax_float_~x .cse0) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)))) [2020-10-25 22:01:34,857 INFO L274 CegarLoopResult]: For program point L24-3(lines 21 42) no Hoare annotation was computed. [2020-10-25 22:01:34,857 INFO L274 CegarLoopResult]: For program point L24-5(lines 24 28) no Hoare annotation was computed. [2020-10-25 22:01:34,857 INFO L270 CegarLoopResult]: At program point L24-6(lines 24 28) the Hoare annotation is: (and (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2020-10-25 22:01:34,857 INFO L274 CegarLoopResult]: For program point L24-7(lines 21 42) no Hoare annotation was computed. [2020-10-25 22:01:34,857 INFO L274 CegarLoopResult]: For program point L49(lines 49 51) no Hoare annotation was computed. [2020-10-25 22:01:34,857 INFO L270 CegarLoopResult]: At program point L41(lines 21 42) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) .cse0) (= ULTIMATE.start___fpclassify_float_~x .cse0) (= (_ bv2 32) |ULTIMATE.start___fpclassify_float_#res|) (= ULTIMATE.start_fmax_float_~x .cse0) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)))) [2020-10-25 22:01:34,858 INFO L270 CegarLoopResult]: At program point L41-1(lines 21 42) the Hoare annotation is: (and (not (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|)) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2020-10-25 22:01:34,858 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 22:01:34,858 INFO L274 CegarLoopResult]: For program point L58-1(lines 58 62) no Hoare annotation was computed. [2020-10-25 22:01:34,858 INFO L270 CegarLoopResult]: At program point L58-2(lines 58 62) the Hoare annotation is: (and |ULTIMATE.start_main_#t~short16| (= (_ +zero 8 24) ULTIMATE.start_main_~res~0) (= (_ +zero 8 24) |ULTIMATE.start_fmax_float_#res|) (= (_ +zero 8 24) ULTIMATE.start___signbit_float_~x) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2020-10-25 22:01:34,858 INFO L274 CegarLoopResult]: For program point L58-3(lines 58 62) no Hoare annotation was computed. [2020-10-25 22:01:34,858 INFO L274 CegarLoopResult]: For program point L35(lines 35 41) no Hoare annotation was computed. [2020-10-25 22:01:34,858 INFO L274 CegarLoopResult]: For program point L35-1(lines 35 41) no Hoare annotation was computed. [2020-10-25 22:01:34,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:01:34 BoogieIcfgContainer [2020-10-25 22:01:34,881 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:01:34,881 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:01:34,881 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:01:34,882 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:01:34,882 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:29" (3/4) ... [2020-10-25 22:01:34,885 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 22:01:34,903 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-10-25 22:01:34,904 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-25 22:01:34,904 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-25 22:01:34,904 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 22:01:34,938 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && 2bv32 == \result) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() [2020-10-25 22:01:34,939 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((~Pluszero~LONGDOUBLE() == \result && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() [2020-10-25 22:01:34,939 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && ~Pluszero~LONGDOUBLE() == res) && ~Pluszero~LONGDOUBLE() == \result) && ~Pluszero~LONGDOUBLE() == x) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() [2020-10-25 22:01:34,940 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((!(0bv32 == \result) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() [2020-10-25 22:01:34,940 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && ~Pluszero~LONGDOUBLE() == res) && ~Pluszero~LONGDOUBLE() == \result) && ~Pluszero~LONGDOUBLE() == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && ~Pluszero~LONGDOUBLE() == x) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && \result == 0bv32) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() [2020-10-25 22:01:34,978 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:01:34,979 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:01:34,984 INFO L168 Benchmark]: Toolchain (without parser) took 6197.18 ms. Allocated memory was 46.1 MB in the beginning and 69.2 MB in the end (delta: 23.1 MB). Free memory was 24.0 MB in the beginning and 49.4 MB in the end (delta: -25.4 MB). Peak memory consumption was 31.6 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:34,985 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 46.1 MB. Free memory is still 31.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:01:34,988 INFO L168 Benchmark]: CACSL2BoogieTranslator took 374.46 ms. Allocated memory is still 46.1 MB. Free memory was 23.3 MB in the beginning and 23.8 MB in the end (delta: -499.8 kB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:34,989 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.47 ms. Allocated memory is still 46.1 MB. Free memory was 23.8 MB in the beginning and 22.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:01:34,989 INFO L168 Benchmark]: Boogie Preprocessor took 38.76 ms. Allocated memory is still 46.1 MB. Free memory was 21.9 MB in the beginning and 20.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:34,990 INFO L168 Benchmark]: RCFGBuilder took 683.92 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 20.4 MB in the beginning and 34.3 MB in the end (delta: -13.9 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:34,990 INFO L168 Benchmark]: TraceAbstraction took 4938.97 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 33.8 MB in the beginning and 18.9 MB in the end (delta: 14.9 MB). Peak memory consumption was 26.3 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:34,990 INFO L168 Benchmark]: Witness Printer took 97.41 ms. Allocated memory is still 69.2 MB. Free memory was 18.9 MB in the beginning and 49.4 MB in the end (delta: -30.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:34,993 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 46.1 MB. Free memory is still 31.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 374.46 ms. Allocated memory is still 46.1 MB. Free memory was 23.3 MB in the beginning and 23.8 MB in the end (delta: -499.8 kB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.47 ms. Allocated memory is still 46.1 MB. Free memory was 23.8 MB in the beginning and 22.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.76 ms. Allocated memory is still 46.1 MB. Free memory was 21.9 MB in the beginning and 20.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 683.92 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 20.4 MB in the beginning and 34.3 MB in the end (delta: -13.9 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4938.97 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 33.8 MB in the beginning and 18.9 MB in the end (delta: 14.9 MB). Peak memory consumption was 26.3 MB. Max. memory is 16.1 GB. * Witness Printer took 97.41 ms. Allocated memory is still 69.2 MB. Free memory was 18.9 MB in the beginning and 49.4 MB in the end (delta: -30.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 67]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 55]: Loop Invariant Derived loop invariant: ((((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && ~Pluszero~LONGDOUBLE() == res) && ~Pluszero~LONGDOUBLE() == \result) && ~Pluszero~LONGDOUBLE() == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && ~Pluszero~LONGDOUBLE() == x) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && \result == 0bv32) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (((~Pluszero~LONGDOUBLE() == \result && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (~Pluszero~LONGDOUBLE() == x && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((!(0bv32 == \result) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: ((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && ~Pluszero~LONGDOUBLE() == res) && ~Pluszero~LONGDOUBLE() == \result) && ~Pluszero~LONGDOUBLE() == x) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && 2bv32 == \result) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.5s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 204 SDslu, 399 SDs, 0 SdLazy, 150 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 197 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s 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, 8 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 16 NumberOfFragments, 168 HoareAnnotationTreeSize, 8 FomulaSimplifications, 44 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 240 ConstructedInterpolants, 15 QuantifiedInterpolants, 14682 SizeOfPredicates, 38 NumberOfNonLiveVariables, 519 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 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 correct! Received shutdown request...