./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-cdfpl/square_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ee8e70e7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-cdfpl/square_2.i -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 e4a477de7e338b2b004255d636f7482e0c252b22 ............................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-cdfpl/square_2.i -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 e4a477de7e338b2b004255d636f7482e0c252b22 .................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-ee8e70e [2020-10-24 14:02:21,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 14:02:21,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 14:02:21,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 14:02:21,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 14:02:21,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 14:02:21,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 14:02:21,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 14:02:21,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 14:02:21,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 14:02:21,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 14:02:21,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 14:02:21,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:02:21,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:02:21,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:02:21,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:02:21,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:02:21,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:02:21,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:02:21,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:02:21,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:02:21,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:02:21,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:02:21,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:02:21,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:02:21,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:02:21,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:02:21,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:02:21,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:02:21,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:02:21,389 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:02:21,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:02:21,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:02:21,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:02:21,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:02:21,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:02:21,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:02:21,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:02:21,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:02:21,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:02:21,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:02:21,402 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-24 14:02:21,462 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:02:21,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:02:21,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:02:21,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:02:21,467 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:02:21,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:02:21,468 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:02:21,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 14:02:21,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:02:21,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:02:21,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:02:21,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:02:21,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:02:21,471 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:02:21,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:02:21,472 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:02:21,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:02:21,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:02:21,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:02:21,474 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:02:21,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:02:21,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:02:21,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:02:21,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:02:21,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:02:21,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 14:02:21,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 14:02:21,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:02:21,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:02:21,477 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a477de7e338b2b004255d636f7482e0c252b22 [2020-10-24 14:02:21,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:02:22,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:02:22,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:02:22,016 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:02:22,018 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:02:22,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_2.i [2020-10-24 14:02:22,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76485429a/11aacde7f93b4583abe67e8d7cd6e540/FLAG5b87de8d4 [2020-10-24 14:02:22,836 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:02:22,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_2.i [2020-10-24 14:02:22,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76485429a/11aacde7f93b4583abe67e8d7cd6e540/FLAG5b87de8d4 [2020-10-24 14:02:23,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76485429a/11aacde7f93b4583abe67e8d7cd6e540 [2020-10-24 14:02:23,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:02:23,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:02:23,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:02:23,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:02:23,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:02:23,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:02:23" (1/1) ... [2020-10-24 14:02:23,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@da1beef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:23, skipping insertion in model container [2020-10-24 14:02:23,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:02:23" (1/1) ... [2020-10-24 14:02:23,233 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:02:23,253 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:02:23,488 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:02:23,500 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:02:23,522 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:02:23,540 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:02:23,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:23 WrapperNode [2020-10-24 14:02:23,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:02:23,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:02:23,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:02:23,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:02:23,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:23" (1/1) ... [2020-10-24 14:02:23,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:23" (1/1) ... [2020-10-24 14:02:23,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:02:23,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:02:23,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:02:23,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:02:23,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:23" (1/1) ... [2020-10-24 14:02:23,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:23" (1/1) ... [2020-10-24 14:02:23,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:23" (1/1) ... [2020-10-24 14:02:23,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:23" (1/1) ... [2020-10-24 14:02:23,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:23" (1/1) ... [2020-10-24 14:02:23,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:23" (1/1) ... [2020-10-24 14:02:23,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:23" (1/1) ... [2020-10-24 14:02:23,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:02:23,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:02:23,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:02:23,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:02:23,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:02:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 14:02:23,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:02:23,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:02:23,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:02:23,996 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:02:23,996 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-24 14:02:23,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:02:23 BoogieIcfgContainer [2020-10-24 14:02:23,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:02:24,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:02:24,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:02:24,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:02:24,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:02:23" (1/3) ... [2020-10-24 14:02:24,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3265385f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:02:24, skipping insertion in model container [2020-10-24 14:02:24,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:23" (2/3) ... [2020-10-24 14:02:24,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3265385f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:02:24, skipping insertion in model container [2020-10-24 14:02:24,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:02:23" (3/3) ... [2020-10-24 14:02:24,018 INFO L111 eAbstractionObserver]: Analyzing ICFG square_2.i [2020-10-24 14:02:24,050 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:02:24,061 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 14:02:24,097 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 14:02:24,155 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:02:24,156 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:02:24,156 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:02:24,156 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:02:24,156 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:02:24,157 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:02:24,158 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:02:24,158 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:02:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-24 14:02:24,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-24 14:02:24,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:02:24,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:02:24,187 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:02:24,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:02:24,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1804966438, now seen corresponding path program 1 times [2020-10-24 14:02:24,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:02:24,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378554886] [2020-10-24 14:02:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:02:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:02:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:02:24,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378554886] [2020-10-24 14:02:24,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:02:24,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 14:02:24,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859329638] [2020-10-24 14:02:24,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 14:02:24,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:02:24,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 14:02:24,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:02:24,432 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-24 14:02:24,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:02:24,451 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-24 14:02:24,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 14:02:24,453 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-10-24 14:02:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:02:24,463 INFO L225 Difference]: With dead ends: 21 [2020-10-24 14:02:24,464 INFO L226 Difference]: Without dead ends: 8 [2020-10-24 14:02:24,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:02:24,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-24 14:02:24,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-24 14:02:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-24 14:02:24,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-10-24 14:02:24,506 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-10-24 14:02:24,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:02:24,507 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-10-24 14:02:24,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 14:02:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-10-24 14:02:24,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-24 14:02:24,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:02:24,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:02:24,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 14:02:24,510 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:02:24,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:02:24,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1806813480, now seen corresponding path program 1 times [2020-10-24 14:02:24,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:02:24,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601669528] [2020-10-24 14:02:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:02:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:02:24,533 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:02:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:02:24,558 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:02:24,591 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 14:02:24,592 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 14:02:24,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 14:02:24,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:02:24 BoogieIcfgContainer [2020-10-24 14:02:24,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:02:24,621 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:02:24,621 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:02:24,622 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:02:24,622 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:02:23" (3/4) ... [2020-10-24 14:02:24,626 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 14:02:24,627 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:02:24,630 INFO L168 Benchmark]: Toolchain (without parser) took 1449.15 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.2 MB in the beginning and 28.2 MB in the end (delta: -7.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2020-10-24 14:02:24,631 INFO L168 Benchmark]: CDTParser took 1.13 ms. Allocated memory is still 35.7 MB. Free memory was 21.7 MB in the beginning and 21.6 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:02:24,632 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.22 ms. Allocated memory is still 44.0 MB. Free memory was 20.6 MB in the beginning and 20.2 MB in the end (delta: 404.8 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-24 14:02:24,633 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.21 ms. Allocated memory is still 44.0 MB. Free memory was 20.2 MB in the beginning and 29.0 MB in the end (delta: -8.8 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. [2020-10-24 14:02:24,634 INFO L168 Benchmark]: Boogie Preprocessor took 24.23 ms. Allocated memory is still 44.0 MB. Free memory was 29.0 MB in the beginning and 28.1 MB in the end (delta: 940.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:02:24,635 INFO L168 Benchmark]: RCFGBuilder took 381.94 ms. Allocated memory is still 44.0 MB. Free memory was 27.9 MB in the beginning and 27.5 MB in the end (delta: 389.9 kB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2020-10-24 14:02:24,637 INFO L168 Benchmark]: TraceAbstraction took 619.86 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 27.2 MB in the beginning and 28.5 MB in the end (delta: -1.3 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2020-10-24 14:02:24,637 INFO L168 Benchmark]: Witness Printer took 6.00 ms. Allocated memory is still 54.5 MB. Free memory was 28.5 MB in the beginning and 28.2 MB in the end (delta: 291.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:02:24,643 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.13 ms. Allocated memory is still 35.7 MB. Free memory was 21.7 MB in the beginning and 21.6 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 350.22 ms. Allocated memory is still 44.0 MB. Free memory was 20.6 MB in the beginning and 20.2 MB in the end (delta: 404.8 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.21 ms. Allocated memory is still 44.0 MB. Free memory was 20.2 MB in the beginning and 29.0 MB in the end (delta: -8.8 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.23 ms. Allocated memory is still 44.0 MB. Free memory was 29.0 MB in the beginning and 28.1 MB in the end (delta: 940.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 381.94 ms. Allocated memory is still 44.0 MB. Free memory was 27.9 MB in the beginning and 27.5 MB in the end (delta: 389.9 kB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 619.86 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 27.2 MB in the beginning and 28.5 MB in the end (delta: -1.3 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. * Witness Printer took 6.00 ms. Allocated memory is still 54.5 MB. Free memory was 28.5 MB in the beginning and 28.2 MB in the end (delta: 291.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryArithmeticFLOAT_SMToperation at line 26, overapproximation of someBinaryFLOAT_SMTComparisonOperation at line 28. Possible FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.398f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_2.c", 7, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 36 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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-ee8e70e [2020-10-24 14:02:27,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 14:02:27,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 14:02:27,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 14:02:27,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 14:02:27,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 14:02:27,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 14:02:27,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 14:02:27,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 14:02:27,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 14:02:27,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 14:02:27,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 14:02:27,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:02:27,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:02:27,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:02:27,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:02:27,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:02:27,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:02:27,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:02:27,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:02:27,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:02:27,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:02:27,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:02:27,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:02:27,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:02:27,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:02:27,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:02:27,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:02:27,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:02:27,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:02:27,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:02:27,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:02:27,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:02:27,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:02:27,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:02:27,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:02:27,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:02:27,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:02:27,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:02:27,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:02:27,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:02:27,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-24 14:02:27,394 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:02:27,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:02:27,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:02:27,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:02:27,397 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:02:27,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:02:27,397 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:02:27,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:02:27,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:02:27,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:02:27,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:02:27,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:02:27,399 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 14:02:27,399 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 14:02:27,399 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:02:27,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:02:27,400 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:02:27,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:02:27,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:02:27,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:02:27,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:02:27,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:02:27,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:02:27,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:02:27,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:02:27,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:02:27,403 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 14:02:27,403 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 14:02:27,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:02:27,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:02:27,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 14:02:27,404 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a477de7e338b2b004255d636f7482e0c252b22 [2020-10-24 14:02:27,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:02:27,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:02:27,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:02:27,884 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:02:27,885 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:02:27,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_2.i [2020-10-24 14:02:27,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/287d22eeb/711db98791844eb3a514c8ce8d4992c1/FLAG6ca837969 [2020-10-24 14:02:28,575 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:02:28,576 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_2.i [2020-10-24 14:02:28,584 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/287d22eeb/711db98791844eb3a514c8ce8d4992c1/FLAG6ca837969 [2020-10-24 14:02:28,969 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/287d22eeb/711db98791844eb3a514c8ce8d4992c1 [2020-10-24 14:02:28,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:02:28,985 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:02:28,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:02:28,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:02:28,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:02:28,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:02:28" (1/1) ... [2020-10-24 14:02:29,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dd483ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:28, skipping insertion in model container [2020-10-24 14:02:29,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:02:28" (1/1) ... [2020-10-24 14:02:29,050 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:02:29,093 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:02:29,315 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:02:29,341 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:02:29,369 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:02:29,389 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:02:29,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:29 WrapperNode [2020-10-24 14:02:29,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:02:29,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:02:29,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:02:29,400 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:02:29,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:29" (1/1) ... [2020-10-24 14:02:29,423 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:29" (1/1) ... [2020-10-24 14:02:29,457 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:02:29,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:02:29,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:02:29,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:02:29,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:29" (1/1) ... [2020-10-24 14:02:29,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:29" (1/1) ... [2020-10-24 14:02:29,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:29" (1/1) ... [2020-10-24 14:02:29,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:29" (1/1) ... [2020-10-24 14:02:29,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:29" (1/1) ... [2020-10-24 14:02:29,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:29" (1/1) ... [2020-10-24 14:02:29,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:29" (1/1) ... [2020-10-24 14:02:29,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:02:29,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:02:29,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:02:29,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:02:29,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:02:29,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 14:02:29,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:02:29,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:02:29,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:02:29,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-10-24 14:02:32,007 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:02:32,007 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-24 14:02:32,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:02:32 BoogieIcfgContainer [2020-10-24 14:02:32,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:02:32,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:02:32,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:02:32,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:02:32,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:02:28" (1/3) ... [2020-10-24 14:02:32,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba25b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:02:32, skipping insertion in model container [2020-10-24 14:02:32,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:29" (2/3) ... [2020-10-24 14:02:32,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba25b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:02:32, skipping insertion in model container [2020-10-24 14:02:32,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:02:32" (3/3) ... [2020-10-24 14:02:32,019 INFO L111 eAbstractionObserver]: Analyzing ICFG square_2.i [2020-10-24 14:02:32,031 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:02:32,036 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 14:02:32,049 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 14:02:32,079 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:02:32,080 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:02:32,080 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:02:32,080 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:02:32,081 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:02:32,081 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:02:32,081 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:02:32,081 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:02:32,096 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-10-24 14:02:32,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 14:02:32,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:02:32,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:02:32,104 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:02:32,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:02:32,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1236260206, now seen corresponding path program 1 times [2020-10-24 14:02:32,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:02:32,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787462788] [2020-10-24 14:02:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-24 14:02:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:02:33,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 14:02:33,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:02:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:02:33,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 14:02:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:02:33,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787462788] [2020-10-24 14:02:33,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:02:33,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 14:02:33,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030420514] [2020-10-24 14:02:33,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 14:02:33,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 14:02:33,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 14:02:33,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:02:33,181 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-10-24 14:02:33,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:02:33,197 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-10-24 14:02:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 14:02:33,199 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-24 14:02:33,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:02:33,227 INFO L225 Difference]: With dead ends: 25 [2020-10-24 14:02:33,227 INFO L226 Difference]: Without dead ends: 11 [2020-10-24 14:02:33,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:02:33,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-10-24 14:02:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-24 14:02:33,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-24 14:02:33,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-10-24 14:02:33,279 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2020-10-24 14:02:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:02:33,280 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-24 14:02:33,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 14:02:33,280 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-10-24 14:02:33,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 14:02:33,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:02:33,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:02:33,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 14:02:33,497 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:02:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:02:33,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1179001904, now seen corresponding path program 1 times [2020-10-24 14:02:33,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:02:33,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272955784] [2020-10-24 14:02:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-24 14:04:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:04:00,765 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:04:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:04:49,007 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:04:49,207 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-24 14:04:49,208 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 14:04:49,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 14:04:49,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:04:49 BoogieIcfgContainer [2020-10-24 14:04:49,443 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:04:49,444 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:04:49,444 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:04:49,444 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:04:49,445 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:02:32" (3/4) ... [2020-10-24 14:04:49,447 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-24 14:04:49,492 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 14:04:49,493 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:04:49,496 INFO L168 Benchmark]: Toolchain (without parser) took 140515.70 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 25.5 MB in the beginning and 26.0 MB in the end (delta: -498.1 kB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. [2020-10-24 14:04:49,497 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 48.2 MB. Free memory is still 26.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:04:49,498 INFO L168 Benchmark]: CACSL2BoogieTranslator took 410.60 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 24.9 MB in the beginning and 47.7 MB in the end (delta: -22.8 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2020-10-24 14:04:49,498 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.03 ms. Allocated memory is still 62.9 MB. Free memory was 47.7 MB in the beginning and 45.9 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:04:49,499 INFO L168 Benchmark]: Boogie Preprocessor took 59.25 ms. Allocated memory is still 62.9 MB. Free memory was 45.9 MB in the beginning and 44.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:04:49,500 INFO L168 Benchmark]: RCFGBuilder took 2488.16 ms. Allocated memory is still 62.9 MB. Free memory was 44.5 MB in the beginning and 44.0 MB in the end (delta: 515.4 kB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. [2020-10-24 14:04:49,501 INFO L168 Benchmark]: TraceAbstraction took 137431.96 ms. Allocated memory is still 62.9 MB. Free memory was 43.7 MB in the beginning and 27.7 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.5 MB. Max. memory is 16.1 GB. [2020-10-24 14:04:49,502 INFO L168 Benchmark]: Witness Printer took 49.46 ms. Allocated memory is still 62.9 MB. Free memory was 27.7 MB in the beginning and 26.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:04:49,506 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 48.2 MB. Free memory is still 26.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 410.60 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 24.9 MB in the beginning and 47.7 MB in the end (delta: -22.8 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.03 ms. Allocated memory is still 62.9 MB. Free memory was 47.7 MB in the beginning and 45.9 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.25 ms. Allocated memory is still 62.9 MB. Free memory was 45.9 MB in the beginning and 44.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2488.16 ms. Allocated memory is still 62.9 MB. Free memory was 44.5 MB in the beginning and 44.0 MB in the end (delta: 515.4 kB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 137431.96 ms. Allocated memory is still 62.9 MB. Free memory was 43.7 MB in the beginning and 27.7 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.5 MB. Max. memory is 16.1 GB. * Witness Printer took 49.46 ms. Allocated memory is still 62.9 MB. Free memory was 27.7 MB in the beginning and 26.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L21] EXPR 0.0f [L21] IN >= 0.0f && IN < 1.0f [L21] EXPR 1.0f [L21] IN >= 0.0f && IN < 1.0f [L15] COND FALSE !(!cond) [L23] float x = IN; [L26] EXPR 1.0f [L26] EXPR 0.5f [L26] EXPR 0.5f*x [L26] EXPR 1.0f + 0.5f*x [L26] EXPR 0.125f [L26] EXPR 0.125f*x [L26] EXPR 0.125f*x*x [L26] EXPR 1.0f + 0.5f*x - 0.125f*x*x [L26] EXPR 0.0625f [L26] EXPR 0.0625f*x [L26] EXPR 0.0625f*x*x [L26] EXPR 0.0625f*x*x*x [L26] EXPR 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x [L26] EXPR 0.0390625f [L26] EXPR 0.0390625f*x [L26] EXPR 0.0390625f*x*x [L26] EXPR 0.0390625f*x*x*x [L26] EXPR 0.0390625f*x*x*x*x [L26] EXPR 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] EXPR 0.0f [L28] EXPR result >= 0.0f && result < 1.398f [L28] EXPR 1.398f [L28] EXPR result >= 0.0f && result < 1.398f [L28] COND TRUE !(result >= 0.0f && result < 1.398f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_2.c", 7, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 137.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 88.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 162 SizeOfPredicates, 0 NumberOfNonLiveVariables, 55 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...