./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-cdfpl/square_1.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_1.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 eb1826e8952b1eb941e064a85d9720fcb947ea7c ............................................................................................................................................................................................................................................................................ 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_1.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 eb1826e8952b1eb941e064a85d9720fcb947ea7c .................................................................................................................................................................................................................................................................................................................... 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 14:02:14,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 14:02:14,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 14:02:14,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 14:02:14,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 14:02:14,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 14:02:14,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 14:02:14,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 14:02:14,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 14:02:14,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 14:02:14,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 14:02:14,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 14:02:14,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:02:14,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:02:14,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:02:14,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:02:14,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:02:14,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:02:14,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:02:14,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:02:14,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:02:14,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:02:14,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:02:14,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:02:14,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:02:14,202 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:02:14,202 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:02:14,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:02:14,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:02:14,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:02:14,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:02:14,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:02:14,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:02:14,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:02:14,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:02:14,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:02:14,226 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:02:14,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:02:14,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:02:14,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:02:14,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:02:14,230 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 14:02:14,259 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:02:14,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:02:14,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:02:14,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:02:14,262 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:02:14,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:02:14,263 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:02:14,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 14:02:14,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:02:14,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:02:14,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:02:14,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:02:14,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:02:14,266 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:02:14,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:02:14,267 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:02:14,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:02:14,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:02:14,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:02:14,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:02:14,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:02:14,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:02:14,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:02:14,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:02:14,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:02:14,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 14:02:14,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 14:02:14,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:02:14,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:02:14,271 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1826e8952b1eb941e064a85d9720fcb947ea7c [2020-10-24 14:02:14,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:02:14,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:02:14,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:02:14,703 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:02:14,704 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:02:14,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_1.i [2020-10-24 14:02:14,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d45b1b32/ea7941778a4d47e791e014f1319faabc/FLAG1b915970d [2020-10-24 14:02:15,531 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:02:15,532 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_1.i [2020-10-24 14:02:15,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d45b1b32/ea7941778a4d47e791e014f1319faabc/FLAG1b915970d [2020-10-24 14:02:15,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d45b1b32/ea7941778a4d47e791e014f1319faabc [2020-10-24 14:02:15,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:02:15,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:02:15,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:02:15,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:02:15,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:02:15,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:02:15" (1/1) ... [2020-10-24 14:02:15,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c4be28f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:15, skipping insertion in model container [2020-10-24 14:02:15,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:02:15" (1/1) ... [2020-10-24 14:02:15,907 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:02:15,931 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:02:16,183 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:02:16,195 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:02:16,215 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:02:16,235 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:02:16,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:16 WrapperNode [2020-10-24 14:02:16,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:02:16,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:02:16,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:02:16,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:02:16,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:16" (1/1) ... [2020-10-24 14:02:16,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:16" (1/1) ... [2020-10-24 14:02:16,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:02:16,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:02:16,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:02:16,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:02:16,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:16" (1/1) ... [2020-10-24 14:02:16,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:16" (1/1) ... [2020-10-24 14:02:16,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:16" (1/1) ... [2020-10-24 14:02:16,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:16" (1/1) ... [2020-10-24 14:02:16,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:16" (1/1) ... [2020-10-24 14:02:16,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:16" (1/1) ... [2020-10-24 14:02:16,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:16" (1/1) ... [2020-10-24 14:02:16,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:02:16,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:02:16,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:02:16,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:02:16,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:16" (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 14:02:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 14:02:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:02:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:02:16,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:02:16,598 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:02:16,599 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-24 14:02:16,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:02:16 BoogieIcfgContainer [2020-10-24 14:02:16,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:02:16,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:02:16,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:02:16,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:02:16,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:02:15" (1/3) ... [2020-10-24 14:02:16,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17969c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:02:16, skipping insertion in model container [2020-10-24 14:02:16,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:16" (2/3) ... [2020-10-24 14:02:16,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17969c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:02:16, skipping insertion in model container [2020-10-24 14:02:16,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:02:16" (3/3) ... [2020-10-24 14:02:16,614 INFO L111 eAbstractionObserver]: Analyzing ICFG square_1.i [2020-10-24 14:02:16,629 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:02:16,636 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 14:02:16,652 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 14:02:16,686 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:02:16,686 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:02:16,687 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:02:16,687 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:02:16,687 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:02:16,687 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:02:16,688 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:02:16,688 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:02:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-24 14:02:16,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-24 14:02:16,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:02:16,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:02:16,719 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:02:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:02:16,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1804966438, now seen corresponding path program 1 times [2020-10-24 14:02:16,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:02:16,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297188977] [2020-10-24 14:02:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:02:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:02:16,915 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 14:02:16,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297188977] [2020-10-24 14:02:16,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:02:16,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 14:02:16,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242708946] [2020-10-24 14:02:16,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 14:02:16,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:02:16,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 14:02:16,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:02:16,948 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-24 14:02:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:02:16,968 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-24 14:02:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 14:02:16,970 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-10-24 14:02:16,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:02:16,981 INFO L225 Difference]: With dead ends: 21 [2020-10-24 14:02:16,982 INFO L226 Difference]: Without dead ends: 8 [2020-10-24 14:02:16,988 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 14:02:17,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-24 14:02:17,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-24 14:02:17,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-24 14:02:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-10-24 14:02:17,037 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-10-24 14:02:17,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:02:17,038 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-10-24 14:02:17,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 14:02:17,039 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-10-24 14:02:17,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-24 14:02:17,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:02:17,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:02:17,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 14:02:17,042 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:02:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:02:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1806813480, now seen corresponding path program 1 times [2020-10-24 14:02:17,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:02:17,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325873464] [2020-10-24 14:02:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:02:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:02:17,106 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:02:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:02:17,166 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:02:17,204 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 14:02:17,205 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 14:02:17,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 14:02:17,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:02:17 BoogieIcfgContainer [2020-10-24 14:02:17,244 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:02:17,245 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:02:17,245 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:02:17,246 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:02:17,247 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:02:16" (3/4) ... [2020-10-24 14:02:17,251 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 14:02:17,252 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:02:17,257 INFO L168 Benchmark]: Toolchain (without parser) took 1379.86 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 23.9 MB in the beginning and 28.7 MB in the end (delta: -4.8 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-10-24 14:02:17,259 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 46.1 MB. Free memory was 26.9 MB in the beginning and 26.9 MB in the end (delta: 32.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:02:17,260 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.63 ms. Allocated memory is still 46.1 MB. Free memory was 23.3 MB in the beginning and 25.0 MB in the end (delta: -1.7 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-24 14:02:17,262 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.71 ms. Allocated memory is still 46.1 MB. Free memory was 24.9 MB in the beginning and 23.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-24 14:02:17,263 INFO L168 Benchmark]: Boogie Preprocessor took 24.12 ms. Allocated memory is still 46.1 MB. Free memory was 23.6 MB in the beginning and 22.6 MB in the end (delta: 988.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:02:17,265 INFO L168 Benchmark]: RCFGBuilder took 293.22 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 22.5 MB in the beginning and 34.3 MB in the end (delta: -11.8 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-24 14:02:17,267 INFO L168 Benchmark]: TraceAbstraction took 639.65 ms. Allocated memory is still 56.6 MB. Free memory was 33.9 MB in the beginning and 29.2 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. [2020-10-24 14:02:17,270 INFO L168 Benchmark]: Witness Printer took 6.66 ms. Allocated memory is still 56.6 MB. Free memory was 29.0 MB in the beginning and 28.7 MB in the end (delta: 287.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:02:17,287 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 46.1 MB. Free memory was 26.9 MB in the beginning and 26.9 MB in the end (delta: 32.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 351.63 ms. Allocated memory is still 46.1 MB. Free memory was 23.3 MB in the beginning and 25.0 MB in the end (delta: -1.7 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.71 ms. Allocated memory is still 46.1 MB. Free memory was 24.9 MB in the beginning and 23.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.12 ms. Allocated memory is still 46.1 MB. Free memory was 23.6 MB in the beginning and 22.6 MB in the end (delta: 988.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 293.22 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 22.5 MB in the beginning and 34.3 MB in the end (delta: -11.8 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 639.65 ms. Allocated memory is still 56.6 MB. Free memory was 33.9 MB in the beginning and 29.2 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. * Witness Printer took 6.66 ms. Allocated memory is still 56.6 MB. Free memory was 29.0 MB in the beginning and 28.7 MB in the end (delta: 287.8 kB). Peak memory consumption was 2.1 MB. 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 < 1.39f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_1.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: 0.5s, 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 14:02:20,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 14:02:20,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 14:02:20,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 14:02:20,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 14:02:20,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 14:02:20,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 14:02:20,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 14:02:20,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 14:02:20,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 14:02:20,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 14:02:20,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 14:02:20,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:02:20,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:02:20,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:02:20,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:02:20,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:02:20,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:02:20,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:02:20,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:02:20,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:02:20,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:02:20,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:02:20,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:02:20,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:02:20,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:02:20,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:02:20,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:02:20,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:02:20,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:02:20,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:02:20,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:02:20,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:02:20,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:02:20,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:02:20,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:02:20,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:02:20,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:02:20,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:02:20,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:02:20,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:02:20,182 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 14:02:20,236 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:02:20,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:02:20,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:02:20,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:02:20,242 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:02:20,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:02:20,242 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:02:20,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:02:20,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:02:20,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:02:20,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:02:20,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:02:20,245 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 14:02:20,245 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 14:02:20,246 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:02:20,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:02:20,246 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:02:20,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:02:20,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:02:20,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:02:20,247 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:02:20,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:02:20,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:02:20,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:02:20,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:02:20,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:02:20,249 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 14:02:20,249 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 14:02:20,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:02:20,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:02:20,250 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 14:02:20,250 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1826e8952b1eb941e064a85d9720fcb947ea7c [2020-10-24 14:02:20,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:02:20,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:02:20,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:02:20,700 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:02:20,701 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:02:20,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_1.i [2020-10-24 14:02:20,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/015f87895/8438aaaa4e2547a8af9c431e38bd11c1/FLAG8373311da [2020-10-24 14:02:21,498 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:02:21,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_1.i [2020-10-24 14:02:21,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/015f87895/8438aaaa4e2547a8af9c431e38bd11c1/FLAG8373311da [2020-10-24 14:02:21,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/015f87895/8438aaaa4e2547a8af9c431e38bd11c1 [2020-10-24 14:02:21,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:02:21,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:02:21,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:02:21,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:02:21,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:02:21,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:02:21" (1/1) ... [2020-10-24 14:02:21,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@712c15ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:21, skipping insertion in model container [2020-10-24 14:02:21,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:02:21" (1/1) ... [2020-10-24 14:02:21,921 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:02:21,964 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:02:22,264 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:02:22,293 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:02:22,335 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:02:22,365 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:02:22,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:22 WrapperNode [2020-10-24 14:02:22,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:02:22,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:02:22,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:02:22,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:02:22,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:22" (1/1) ... [2020-10-24 14:02:22,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:22" (1/1) ... [2020-10-24 14:02:22,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:02:22,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:02:22,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:02:22,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:02:22,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:22" (1/1) ... [2020-10-24 14:02:22,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:22" (1/1) ... [2020-10-24 14:02:22,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:22" (1/1) ... [2020-10-24 14:02:22,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:22" (1/1) ... [2020-10-24 14:02:22,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:22" (1/1) ... [2020-10-24 14:02:22,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:22" (1/1) ... [2020-10-24 14:02:22,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:22" (1/1) ... [2020-10-24 14:02:22,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:02:22,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:02:22,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:02:22,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:02:22,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:22" (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 14:02:22,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 14:02:22,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:02:22,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:02:22,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:02:22,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-10-24 14:02:25,000 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:02:25,000 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-24 14:02:25,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:02:25 BoogieIcfgContainer [2020-10-24 14:02:25,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:02:25,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:02:25,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:02:25,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:02:25,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:02:21" (1/3) ... [2020-10-24 14:02:25,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41753615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:02:25, skipping insertion in model container [2020-10-24 14:02:25,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:02:22" (2/3) ... [2020-10-24 14:02:25,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41753615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:02:25, skipping insertion in model container [2020-10-24 14:02:25,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:02:25" (3/3) ... [2020-10-24 14:02:25,013 INFO L111 eAbstractionObserver]: Analyzing ICFG square_1.i [2020-10-24 14:02:25,026 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:02:25,032 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 14:02:25,046 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 14:02:25,075 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:02:25,075 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:02:25,075 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:02:25,076 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:02:25,076 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:02:25,076 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:02:25,076 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:02:25,077 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:02:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-10-24 14:02:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 14:02:25,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:02:25,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:02:25,099 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:02:25,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:02:25,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1236260206, now seen corresponding path program 1 times [2020-10-24 14:02:25,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:02:25,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623484304] [2020-10-24 14:02:25,122 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 14:02:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:02:26,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 14:02:26,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:02:26,044 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 14:02:26,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 14:02:26,049 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 14:02:26,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623484304] [2020-10-24 14:02:26,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:02:26,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 14:02:26,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116609593] [2020-10-24 14:02:26,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 14:02:26,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 14:02:26,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 14:02:26,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:02:26,078 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-10-24 14:02:26,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:02:26,096 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-10-24 14:02:26,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 14:02:26,098 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-24 14:02:26,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:02:26,108 INFO L225 Difference]: With dead ends: 25 [2020-10-24 14:02:26,108 INFO L226 Difference]: Without dead ends: 11 [2020-10-24 14:02:26,111 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 14:02:26,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-10-24 14:02:26,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-24 14:02:26,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-24 14:02:26,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-10-24 14:02:26,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2020-10-24 14:02:26,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:02:26,149 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-24 14:02:26,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 14:02:26,149 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-10-24 14:02:26,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 14:02:26,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:02:26,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:02:26,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 14:02:26,364 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:02:26,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:02:26,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1179001904, now seen corresponding path program 1 times [2020-10-24 14:02:26,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:02:26,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118492658] [2020-10-24 14:02:26,368 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 14:02:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:02:40,200 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:03:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:03:06,634 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:03:06,806 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-24 14:03:06,806 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 14:03:07,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 14:03:07,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:03:07 BoogieIcfgContainer [2020-10-24 14:03:07,042 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:03:07,042 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:03:07,043 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:03:07,043 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:03:07,044 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:02:25" (3/4) ... [2020-10-24 14:03:07,046 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-24 14:03:07,100 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 14:03:07,101 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:03:07,104 INFO L168 Benchmark]: Toolchain (without parser) took 45243.08 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 20.0 MB in the beginning and 33.0 MB in the end (delta: -13.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2020-10-24 14:03:07,105 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 41.9 MB. Free memory was 29.3 MB in the beginning and 29.3 MB in the end (delta: 39.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:03:07,106 INFO L168 Benchmark]: CACSL2BoogieTranslator took 505.25 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 19.4 MB in the beginning and 35.7 MB in the end (delta: -16.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-10-24 14:03:07,107 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.28 ms. Allocated memory is still 50.3 MB. Free memory was 35.7 MB in the beginning and 33.9 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:03:07,108 INFO L168 Benchmark]: Boogie Preprocessor took 43.45 ms. Allocated memory is still 50.3 MB. Free memory was 33.9 MB in the beginning and 32.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:03:07,108 INFO L168 Benchmark]: RCFGBuilder took 2495.16 ms. Allocated memory is still 50.3 MB. Free memory was 32.4 MB in the beginning and 26.1 MB in the end (delta: 6.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2020-10-24 14:03:07,109 INFO L168 Benchmark]: TraceAbstraction took 42037.17 ms. Allocated memory is still 50.3 MB. Free memory was 25.5 MB in the beginning and 20.0 MB in the end (delta: 5.6 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-10-24 14:03:07,110 INFO L168 Benchmark]: Witness Printer took 58.50 ms. Allocated memory is still 50.3 MB. Free memory was 20.0 MB in the beginning and 33.0 MB in the end (delta: -13.0 MB). Peak memory consumption was 3.9 MB. Max. memory is 16.1 GB. [2020-10-24 14:03:07,115 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 41.9 MB. Free memory was 29.3 MB in the beginning and 29.3 MB in the end (delta: 39.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 505.25 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 19.4 MB in the beginning and 35.7 MB in the end (delta: -16.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 86.28 ms. Allocated memory is still 50.3 MB. Free memory was 35.7 MB in the beginning and 33.9 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.45 ms. Allocated memory is still 50.3 MB. Free memory was 33.9 MB in the beginning and 32.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 2495.16 ms. Allocated memory is still 50.3 MB. Free memory was 32.4 MB in the beginning and 26.1 MB in the end (delta: 6.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 42037.17 ms. Allocated memory is still 50.3 MB. Free memory was 25.5 MB in the beginning and 20.0 MB in the end (delta: 5.6 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Witness Printer took 58.50 ms. Allocated memory is still 50.3 MB. Free memory was 20.0 MB in the beginning and 33.0 MB in the end (delta: -13.0 MB). Peak memory consumption was 3.9 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 < 1.39f [L28] EXPR 1.39f [L28] EXPR result >= 0.0f && result < 1.39f [L28] COND TRUE !(result >= 0.0f && result < 1.39f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_1.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: 41.9s, 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, 14.4s 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...